{"title":"Heater valves \u0026 duo valves","description":"\u003cp\u003eTested genuine heater valves and duo valves for classic Mercedes – W124, W126, R129 \u0026amp; co. The duo valve is the most common cause when the heating doesn't get warm or heats constantly. All valves are tested before shipping. Guide: \u003ca href=\"\/en\/blogs\/mercedes-tacho-reparatur\/mercedes-duoventil-heizungsventil-defekt\"\u003eHeating not getting warm? Check \u0026amp; replace the duo valve\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"bmw-heizungsventil-wasserventil-behr-9094402409-e24-e32-e34-duoventil-bosch","title":"BMW Heater Valve Water Valve Behr 9094402409 E24 E32 E34 Duo Valve Bosch","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eDual water valve (duo valve) of the automatic climate control for BMW E24, E32 \u0026amp; E34, Behr no. 9094402409.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eTwo Bosch solenoid valves  ·  For models with automatic climate control  ·  \u003cstrong style=\"color:#c69a3a;\"\u003eBehr 90 944 02 409\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003eCondition of this part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eUsed part with signs of use. The function has not been tested, it is sold in its current condition – see the product photos for details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFunction and location\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThis dual water valve (heater control valve) is part of the automatic climate control. Two electrically controlled Bosch solenoid valves inside it regulate the coolant flow to the heater's heat exchanger.\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eThe valve is installed in the engine bay, on the bulkhead.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eHow can you tell if a heater valve is faulty?\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 16px;padding-left:20px;\"\u003e\n\u003cli\u003eThe heater can no longer be regulated properly – stays cold or heats continuously\u003c\/li\u003e\n\u003cli\u003eInterior temperature no longer responds to the automatic climate control, or fluctuates uncontrollably\u003c\/li\u003e\n\u003cli\u003eValve noticeably sticks in one position (jams open or closed)\u003c\/li\u003e\n\u003cli\u003eCoolant loss or visible leak directly at the valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCompatible vehicles\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eFits the following BMW models with automatic climate control and dual water valve:\u003c\/p\u003e\n\u003cul style=\"margin:0 0 16px;padding-left:20px;\"\u003e\n\u003cli\u003e6 Series E24 (1977–1989)\u003c\/li\u003e\n\u003cli\u003e7 Series E32 (1986–1994)\u003c\/li\u003e\n\u003cli\u003e5 Series E34 (1987–1993)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:0 0 16px;\"\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e Behr 90 944 02 409 (9094402409), BMW 1 147 412 029 (corresponds to BMW 64 11 1 374 304), Bosch solenoid valves, 12 V.\u003c\/p\u003e\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003ePlease compare the numbers: Behr 90 944 02 409, BMW 1 147 412 029 (= 64 11 1 374 304), Bosch, 12 V. Be sure to compare the valve and connector layout 1:1 with your old part. This is the dual\/duo valve (two solenoid valves) of the automatic climate control.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:700;\"\u003eDoes not fit:\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003eThe single valve without automatic climate control (e.g. E28)\u003c\/li\u003e\n\u003cli\u003eThe different valves of the E31, E36 and E38 model series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 16px;\"\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eWhat kind of valve is this?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eA dual water valve (duo valve) of the automatic climate control with two electrically controlled Bosch solenoid valves that regulate the coolant flow to the heat exchanger.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eWhat condition is the valve in?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eIt is a used part with signs of use. The function has not been tested, it is sold in its current condition.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eDoes the valve also fit without automatic climate control, or for E31\/E36\/E38?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. This duo valve is designed for models with automatic climate control and differs from the single valve (e.g. E28) as well as from the different valves of the E31, E36 and E38 model series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/weitere-marken\"\u003eOther makes\u003c\/a\u003e, \u003ca href=\"\/en\/collections\/heizungsventile\"\u003eHeater valves \u0026amp; duo valves\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":54850911174985,"sku":"60716","price":89.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_981d14b6-f0ee-461c-9b24-d2eb2311e13c.jpg?v=1787303890"},{"product_id":"mercedes-w126-heizung-heizungsventil-duoventil-wasserpumpe-0008303884-a000830378","title":"Mercedes W126 heating heater valve duo valve water pump 0008303884 A000830378","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eHeater valve (duo valve) for Mercedes-Benz W126 and W107, part numbers A0008303784 \/ 0008303884.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eFunction tested  ·  Fits W126 and W107  ·  \u003cstrong style=\"color:#c69a3a;\"\u003eFree shipping within Germany\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 16px;\"\u003e\n\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #e3e5e9;border-radius:999px;padding:5px 12px;margin:0 6px 6px 0;font-size:14px;\"\u003e✓ Function tested\u003c\/span\u003e\n\u003c\/p\u003e\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003eCondition of this part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eUsed part, function tested and working. Age-related signs of storage and use are possible – please also refer to the product photos for the external condition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCompatible vehicles\u003c\/h3\u003e\n\u003cp\u003eFits the Mercedes-Benz model series W126 and W107.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e A0008303784, 0008303884.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eWhat's included in the scope of delivery?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe scope of delivery corresponds to the product photos. As this is a used part, please also check the external condition using the photos.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eHow can I be sure the valve fits my vehicle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe safest way is via our free vehicle check: send us the VIN (chassis number) and model year, and we'll match it against part numbers A0008303784 and 0008303884.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eCan I return the part if it doesn't fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes, a 60-day return policy applies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/w126\"\u003eW126\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizung-klima\"\u003eHeating \u0026amp; A\/C\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizungsventile\"\u003eHeater valves \u0026amp; duo valves\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"Mercedes-Benz","offers":[{"title":"Default Title","offer_id":54850928574793,"sku":"60638","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_7c095c03-1247-486d-bfd4-bf421e89655c.jpg?v=1783984378"},{"product_id":"mercedes-duoventil-heizungsventil-a0008306584-w124-s124-r129-300-e-e320-sl-bosch","title":"Mercedes duo valve heater valve A0008306584 W124 S124 R129 300 E E320 SL Bosch","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eRefurbished genuine duo valve – like new.\u003c\/strong\u003e Bosch\/Mercedes-Benz genuine part for W124, S124, C124, A124 and R129: completely disassembled, all wear parts replaced, thoroughly cleaned – not an untested used part.\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003e✔ All wear parts replaced  ·  ✔ Every valve tested individually  ·  \u003cstrong style=\"color:#c69a3a;\"\u003e✔ 5-year warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eLeak tightness ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eFlow ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eSwitching function ✓\u003c\/span\u003e\u003cbr\u003eEvery valve is tested individually after refurbishment: leak test, flow test and switching test of both valve circuits.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e5-year warranty on this refurbished part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eIf there is a problem: send the valve in – we will repair or replace it, replacement units are in stock. In addition, a 60-day return policy and free shipping within Germany apply.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!--altteil-bonus--\u003e\u003cdiv style=\"background:#f5f6f8;border:2px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e♻ Old-part bonus: money back for your old duo valve\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eBuy this valve at the regular price, install it at your leisure, and then send us your old duo valve – even if it is defective, as long as it is complete. Upon receipt we will refund you \u003cstrong\u003e15 €\u003c\/strong\u003e to your payment method (even 35 € for an old valve with an auxiliary water pump). Simply send in the old part within 60 days on our \u003ca href=\"\/en\/pages\/ankauf#anmelden\"\u003ebuyback page\u003c\/a\u003e – all conditions are listed there as well.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 16px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eYour options\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003ePrice\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eMercedes new part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003en\/a – no longer available (former list price per EPC: 255,53 €)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e–\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eUntested used part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e60–117 €\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003enone – condition unknown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f6f8;\"\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003eRefurbished genuine part (this listing)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e170 €\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e5 years ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow can you tell a duo valve is defective?\u003c\/h3\u003e\n\u003cp\u003eOne side no longer heats, the heater stays hot permanently or fails completely – the cases vary and can affect one or both heating circuits. The duo valve sits in the engine bay on the bulkhead and, by pulsing, controls the heating water flow to both heater cores (side-independent temperature control, 3-pin connector, de-energized open = full heating output).\u003c\/p\u003e\n\u003cp\u003eDetailed diagnostic guide with symptom table and self-check in the guide: \u003ca href=\"\/en\/blogs\/mercedes-tacho-reparatur\/w124-duoventil-heizungsventil-defekt\"\u003eW124 heating not getting warm or staying hot? Check the duo valve \u0026amp; solution\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFits the following Mercedes models\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 12px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eup to 5\/1993\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003efrom 6\/1993\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eW124 sedan\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e200 E, 230 E, 260 E, 280 E, 300 E, 300 E-24\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eE 200, E 220, E 280, E 320\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eS124 T-model\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e230 TE, 300 TE, 300 TE-24\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eE 200 T, E 220 T, E 280 T, E 320 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eC124 coupe\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e230 CE, 300 CE, 300 CE-24\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eE 200 Coupe, E 320 Coupe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eR129 SL\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e300 SL, 300 SL-24, 500 SL\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eSL 280, SL 320, SL 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe E-Class Cabriolet (A124) is also covered according to the Mercedes parts catalog (EPC). A prerequisite is always automatic climate control or Tempmatic – vehicles with manual heating (Bowden cable) do not use this valve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e A0008306584 \/ 0008306584 (Mercedes) · 1147412015 (Bosch). Price applies per piece. Scope of delivery: see product images.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eThe version with integrated auxiliary water pump (A0018303784, generally fitted from approx. 08\/1991) is a different part – as are other deviating numbers (e.g. 0008307284). The number on your installed valve is what counts, please compare 1:1. We also have the pump version in stock, refurbished: \u003ca href=\"\/en\/products\/mercedes-w124-duoventil-heizungsventil-umwalzpumpe-bosch-a0018303784-392020028\"\u003eDuo valve A0018303784 with auxiliary water pump\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eWhat warranty is provided?\u003c\/h4\u003e\n\u003cp\u003e5-year warranty on this refurbished part. If there is a problem, simply send the valve in – we repair or replace it, replacement units are in stock. In addition there is a 60-day return policy and free shipping within Germany.\u003c\/p\u003e\n\u003ch4\u003eDoes the valve fit my car?\u003c\/h4\u003e\n\u003cp\u003eAccording to the Mercedes parts catalog, the valve is fitted in model series 124 (sedan, wagon, coupe, cabriolet) and 129 (SL) with automatic climate control\/Tempmatic – and in no others. The safest way: read the part number off the old valve and compare it 1:1. If in doubt, we will check it for free using your VIN.\u003c\/p\u003e\n\u003ch4\u003eHow is the valve tested?\u003c\/h4\u003e\n\u003cp\u003eAfter refurbishment, every valve goes through our own in-house developed test procedure with three stations: leak test, flow test and switching test of both valve circuits. Only when all three are passed does the part go on sale.\u003c\/p\u003e\n\u003ch4\u003eWhy is there no new part?\u003c\/h4\u003e\n\u003cp\u003eMercedes no longer supplies part number A0008306584, and there is no aftermarket version on the market. That is why we fully refurbish genuine parts – “like new” condition, at a price below the former Mercedes list price of 255,53 €.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e is a specialist parts dealer for classic Mercedes cars with over 1,080 eBay reviews (99.8 % positive). Every duo valve from our refurbishment program goes through our own in-house developed test and refurbishment procedure.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":54872664572233,"sku":"60768","price":170.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/s-l1600_f5f89909-063d-487e-9db7-09237e3f7131.webp?v=1784305131"},{"product_id":"mercedes-w124-duoventil-heizungsventil-umwalzpumpe-bosch-a0018303784-392020028","title":"Mercedes W124 duo valve heater control valve auxiliary water pump Bosch A0018303784 0392020028","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eRefurbished genuine duo valve with auxiliary water pump – like new.\u003c\/strong\u003e Bosch\/Mercedes genuine part A0018303784 for the late W124: valve and integrated auxiliary water pump completely overhauled, all wear parts replaced, thoroughly cleaned – not an untested used part.\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eValve and auxiliary water pump completely overhauled  ·  Every valve individually tested  ·  \u003cstrong style=\"color:#c69a3a;\"\u003e5-year warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eLeak tightness ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eFlow ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eSwitching function ✓\u003c\/span\u003e\u003cbr\u003eEvery valve is tested individually after refurbishment: leak test, flow test and switching test of both valve circuits.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e5-year warranty on this refurbished part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eShould a problem occur: send in the valve – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!--altteil-bonus--\u003e\u003cdiv style=\"background:#f5f6f8;border:2px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e♻ Old-part bonus: 35 € back for your old duo valve\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eBuy this valve at the regular price, install it at your leisure, and then send us your old duo valve with auxiliary water pump – even if it is defective, as long as it is complete. Upon receipt we will refund you \u003cstrong\u003e35 €\u003c\/strong\u003e to your payment method (15 € for an old valve without a pump). Simply send in the old part within 60 days on our \u003ca href=\"\/en\/pages\/ankauf#anmelden\"\u003ebuyback page\u003c\/a\u003e – all conditions are listed there as well.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 16px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eYour options\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eCondition\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eMercedes new part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eno longer available\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e–\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eUntested used part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eCondition of valve and pump unknown\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003enone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f6f8;\"\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e\u003cstrong\u003eRefurbished genuine part (this listing)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003ecompletely overhauled, all wear parts replaced, tested three times\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e5 years ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow can you tell a duo valve with auxiliary water pump is defective?\u003c\/h3\u003e\n\n\u003cp\u003eOne side no longer heats, the heater stays hot permanently or fails completely – the cases vary and can affect one or both heating circuits. The duo valve sits in the engine bay on the bulkhead and, by pulsing, controls the heating water flow to both heater cores (side-independent temperature control, de-energized open = full heating output).\u003c\/p\u003e\n\n\u003cp\u003eTypical for the version \u003cstrong\u003ewith\u003c\/strong\u003e auxiliary water pump: when stationary and at low engine speed the heater does not get properly warm, while it works at higher engine speed – then the pump no longer delivers enough heating water.\u003c\/p\u003e\n\n\u003cp\u003eDetailed diagnostic instructions in the guide: \u003ca href=\"\/en\/blogs\/mercedes-tacho-reparatur\/w124-umwaelzpumpe-heizung-duoventil-pruefen\"\u003eW124 heater cold at idle? Check the auxiliary water pump on the duo valve\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFits the following Mercedes models\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eModel series 124 with automatic climate control or Tempmatic\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eW124 sedan\u003c\/li\u003e\n\u003cli\u003eS124 T-model\u003c\/li\u003e\n\u003cli\u003eC124 coupe\u003c\/li\u003e\n\u003cli\u003eA124 Cabriolet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis version with integrated auxiliary water pump was generally fitted from approx. 08\/1991. Vehicles with manual heating (Bowden cable) do not use this valve.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e A0018303784 \/ 0018303784 (Mercedes) · 0392020028 (Bosch). Price applies per piece. Scope of delivery: see product images.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eThe version \u003cstrong\u003ewithout\u003c\/strong\u003e auxiliary water pump carries the number A0008306584 and is a different part – as are other deviating numbers. The number on your installed valve is what counts, please compare 1:1. We also have the version without a pump in stock, refurbished: \u003ca href=\"\/en\/products\/mercedes-duoventil-heizungsventil-a0008306584-w124-s124-r129-300-e-e320-sl-bosch\"\u003eDuo valve A0008306584 without auxiliary water pump\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003ch4\u003eWhat warranty is provided?\u003c\/h4\u003e\n\n\u003cp\u003e5-year warranty on this refurbished part. If there is a problem, simply send the valve in – we repair or replace it. In addition there is a 60-day return policy and free shipping within Germany.\u003c\/p\u003e\n\n\u003ch4\u003eHow does it differ from the valve without a pump?\u003c\/h4\u003e\n\n\u003cp\u003eThis version has an integrated electric auxiliary water pump that circulates the heating water when stationary and at low engine speed. It carries part number A0018303784 and was generally fitted from approx. 08\/1991. The version without a pump (A0008306584) is not identical in construction.\u003c\/p\u003e\n\n\u003ch4\u003eHow is the valve tested?\u003c\/h4\u003e\n\n\u003cp\u003eAfter refurbishment, every valve goes through our own in-house developed test procedure with three stations: leak test, flow test and switching test of both valve circuits. Only when all three are passed does the part go on sale.\u003c\/p\u003e\n\n\u003ch4\u003eWhy is there no new part?\u003c\/h4\u003e\n\n\u003cp\u003eMercedes no longer supplies this valve, and there is no aftermarket version on the market. That is why we fully refurbish genuine parts – “like new” condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specializes in spare parts for classic Mercedes cars. Every duo valve from our refurbishment program goes through our own in-house developed test and refurbishment procedure.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":54984557658441,"sku":"60798","price":348.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_9581c1a6-d5b1-4602-8e4f-ff16df6fb848.png?v=1785733811"},{"product_id":"bmw-duoventil-heizungsventil-wasserventil-64111374304-e32-e34-730i-750i-uberholt","title":"BMW Duo Valve Heater Control Valve Water Valve 64111374304 E32 E34 730i 750i Overhauled","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eGenuine BMW duo valve by Behr – remanufactured.\u003c\/strong\u003e Heater valve (duo valve) 64 11 1 374 304 for the BMW 7 Series E32 and the early 5 Series E34 – refurbished genuine part by Behr with Bosch solenoid valves.\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003e✔ Individually tested before sale  ·  ✔ Genuine part – not aftermarket  ·  \u003cstrong style=\"color:#c69a3a;\"\u003e✔ 5-year warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eLeak tightness ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eFlow ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eSwitching test ✓\u003c\/span\u003e\u003cbr\u003eA leak test, flow test and switching test of both valve circuits were carried out on this part.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e5-year warranty on this refurbished part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eShould there be a problem: send in the part – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 16px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eYour options\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eCondition\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eUntested used part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eCondition unknown\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003enone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f6f8;\"\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003eRefurbished genuine part (this listing)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003ecompletely disassembled, cleaned, new seals, leak, flow and switching test\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e5 years ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow can you tell if a heater valve is faulty?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeater runs at full heat constantly and can no longer be turned down\u003c\/li\u003e\n\u003cli\u003eOne side stays cold, the other gets warm\u003c\/li\u003e\n\u003cli\u003eLittle heat at idle or delayed response to the temperature control\u003c\/li\u003e\n\u003cli\u003eCoolant loss or coolant smell in the interior due to leaking seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwo electrically controlled solenoid valves in one housing separately regulate the coolant flow to the left and right heater cores – so the temperature can be set separately for the driver and passenger sides. The valve is connected via a 3-pin round connector (12 V). Installation location: in the engine compartment in the heater supply line, mounted together with the auxiliary water pump on vibration dampers and covered; separate hoses lead from there to the left and right heater cores.\u003c\/p\u003e\n\n\u003ch3\u003eFits the following BMW models\u003c\/h3\u003e\n\u003cp\u003eAccording to the BMW parts catalog for E32 and E34 up to production date 03\/1988 and for E32 with auxiliary heater (parking heater) over the entire production period. Please compare the number on your own valve.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 12px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModel series\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e7 Series E32 (production up to 03\/1988, with parking heater up to 1994)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e730i \/ 730iL (M30), 735i \/ 735iL (M30), 750i \/ 750iL (M70 V12)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e5 Series E34 sedan (production up to 03\/1988)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e520i (M20), 525i (M20), 530i (M30), 535i (M30), 524td (M21)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e 64 11 1 374 304 \/ 64111374304 (BMW) · 64 11 1 388 619 \/ 64111388619 (BMW successor, retroactively interchangeable) · 1 147 412 029 \/ 1147412029 (Bosch) · 90.944.02.409 \/ 9094402409 (Behr) · Stamping: BMW 1 374 304, Behr 90.944.02.409, Bosch 1 147 412 029, 12 V. Scope of delivery: see product images.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eVehicles from production 03\/1988 without parking heater: from 03\/1988, E32 and E34 have valve 64 11 8 391 417 (Bosch 1 147 412 042) with different hoses – according to BMW not retroactively interchangeable. Not for E31, E36, E38, E39: 8 Series E31 64 11 8 391 417, 3 Series E36 64 11 8 375 792, E38 and E39 valve with auxiliary water pump 64 11 8 374 994.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:700;\"\u003eDoes not fit:\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003eE32 and E34 from production 03\/1988 without parking heater\u003c\/li\u003e\n\u003cli\u003e8 Series E31\u003c\/li\u003e\n\u003cli\u003e3 Series E36\u003c\/li\u003e\n\u003cli\u003e7 Series E38 and 5 Series E39\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eWhat warranty is provided?\u003c\/h4\u003e\n\u003cp\u003e5-year warranty on this refurbished part. If there is a problem, simply send the part in – we will repair or replace it. Plus a 60-day return policy and free shipping in Germany.\u003c\/p\u003e\n\u003ch4\u003eWill this part definitely fit my vehicle?\u003c\/h4\u003e\n\u003cp\u003eSend us your VIN before you buy. We will check it against the parts catalog and tell you with certainty whether this part fits.\u003c\/p\u003e\n\u003ch4\u003eDo I need to send in my old part?\u003c\/h4\u003e\n\u003cp\u003eNo. No core deposit is charged and you don't need to return anything.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/weitere-marken\"\u003eOther makes\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizungsventile\"\u003eHeater valves \u0026amp; duo valves\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":55680533594441,"sku":"60933","price":349.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_cfafc557-5e52-4eff-a0c7-5219bbedf6d8.jpg?v=1792491513"},{"product_id":"mercedes-monoventil-heizungsventil-a0008303784-w126-c126-sec-1147412012-uberholt","title":"Mercedes Mono Valve Heater Control Valve A0008303784 W126 C126 SEC 1147412012 Overhauled","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eGenuine Mercedes heater control valve by Bosch – remanufactured.\u003c\/strong\u003e Mono valve A0008303784 for the S-Class W126 and the coupe C126 with automatic climate control – refurbished genuine part.\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003e✔ Individually tested before sale  ·  ✔ Genuine part – not aftermarket  ·  \u003cstrong style=\"color:#c69a3a;\"\u003e✔ 5-year warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eLeak tightness ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eFlow ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eSwitching test ✓\u003c\/span\u003e\u003cbr\u003eA leak test, flow test and switching test of the solenoid valve were carried out on this part.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e5-year warranty on this refurbished part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eShould there be a problem: send in the part – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 16px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eYour options\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eCondition\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eUntested used part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eCondition unknown\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003enone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f6f8;\"\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003eRefurbished genuine part (this listing)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003ecompletely disassembled, cleaned, new seals, leak, flow and switching test\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e5 years ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow can you tell if a heater valve is faulty?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo or only weak heating, often due to a torn diaphragm in the valve\u003c\/li\u003e\n\u003cli\u003eHeater alternates between warm and cold; heat only comes once the valve connector is unplugged\u003c\/li\u003e\n\u003cli\u003eConstant unwanted heat, especially at idle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe mono valve regulates how much hot coolant flows through the heater core. The climate control unit continuously pulses the solenoid valve open and closed and thus maintains the set interior temperature; in the MAX position the valve stays fully open. Installation location: between the two bulkheads behind the ventilation grille in front of the windshield, directly above the auxiliary water pump.\u003c\/p\u003e\n\n\u003ch3\u003eFits the following Mercedes models\u003c\/h3\u003e\n\u003cp\u003eOnly for vehicles with automatic climate control. For vehicles up to model year 1982, please compare the number on your own valve.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 12px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModel series\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eS-Class W126 sedan with automatic climate control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e260 SE, 300 SE \/ 300 SEL, 380 SE \/ 380 SEL, 420 SE \/ 420 SEL, 500 SE \/ 500 SEL, 560 SE \/ 560 SEL, 300 SD \/ 300 SDL, 350 SD \/ 350 SDL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eS-Class coupe C126 with automatic climate control\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e380 SEC, 420 SEC, 500 SEC, 560 SEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e A 000 830 37 84 \/ A0008303784 (Mercedes-Benz) · 1 147 412 012 \/ 1147412012 (Bosch). Scope of delivery: see product images. Price is per pc; you will receive one unit in a condition comparable to the one pictured.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eThis is a mono valve, not a duo valve: W126 without automatic climate control have a duo valve with the number A 000 830 38 84 (with windshield heating) or A 126 830 00 84 (without windshield heating). R107, W201, W124 and R129 are also not compatible: the R107 with automatic climate control has A 000 830 34 84, the 190 series W201 A 000 830 57 84, W124 and R129 have the duo valves A 000 830 65 84 and A 001 830 37 84 respectively. The same symptoms can also be caused by a faulty climate control unit – please check the valve's control signal before buying.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:700;\"\u003eDoes not fit:\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003eW126 and C126 without automatic climate control (duo valve)\u003c\/li\u003e\n\u003cli\u003eSL R107\u003c\/li\u003e\n\u003cli\u003e190 series W201\u003c\/li\u003e\n\u003cli\u003eW124 and R129\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eMy heater does not regulate properly – is the mono valve to blame?\u003c\/h4\u003e\n\u003cp\u003eNot necessarily. A faulty climate control unit can cause the same symptoms. Please check the valve's control signal before buying.\u003c\/p\u003e\n\u003ch4\u003eWhat warranty is provided?\u003c\/h4\u003e\n\u003cp\u003e5-year warranty on this refurbished part. If there is a problem, simply send the part in – we will repair or replace it. Plus a 60-day return policy and free shipping in Germany.\u003c\/p\u003e\n\u003ch4\u003eWill this part definitely fit my vehicle?\u003c\/h4\u003e\n\u003cp\u003eSend us your VIN before you buy. We will check it against the parts catalog and tell you with certainty whether this part fits.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/w126\"\u003eW126\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizung-klima\"\u003eHeating \u0026amp; A\/C\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizungsventile\"\u003eHeater valves \u0026amp; duo valves\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"KFZTeile-Thot","offers":[{"title":"Default Title","offer_id":55680533627209,"sku":"60934","price":269.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_1fb5ae33-9636-4976-ae9b-bd3d5ab6127e.jpg?v=1792491516"},{"product_id":"bmw-heizungsventil-wasserventil-64111373188-e28-5er-518i-520i-525e-528e-uberholt","title":"BMW Heater Control Valve Water Valve 64111373188 E28 5 Series 518i 520i 525e 528e Overhauled","description":"\u003cdiv style=\"background:#242833;border-radius:8px;padding:18px 20px;margin:0 0 14px;color:#ffffff;\"\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong style=\"color:#c69a3a;\"\u003eGenuine BMW heater valve by Behr with Bosch solenoid part – remanufactured.\u003c\/strong\u003e Heater valve 64111373188 for the 5 Series E28 with M10, M20 and diesel M21 – refurbished genuine part.\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003e✔ Individually tested before sale  ·  ✔ Genuine part – not aftermarket  ·  \u003cstrong style=\"color:#c69a3a;\"\u003e✔ 5-year warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eLeak tightness ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eFlow ✓\u003c\/span\u003e\u003cspan style=\"display:inline-block;background:#f5f6f8;border:1px solid #c69a3a;border-radius:8px;padding:5px 12px;margin:2px 6px 2px 0;font-weight:600;\"\u003eSwitching test ✓\u003c\/span\u003e\u003cbr\u003eA leak test, flow test and switching test of the solenoid valve were carried out on this part.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e5-year warranty on this refurbished part\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eShould there be a problem: send in the part – we will repair or replace it. In addition, a 60-day return policy and free shipping within Germany apply.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 16px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eYour options\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eCondition\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eWarranty\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eUntested used part\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003eCondition unknown\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003enone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f6f8;\"\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003eRefurbished genuine part (this listing)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003ecompletely disassembled, cleaned, new seals, leak, flow and switching test\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;font-weight:700;\"\u003e5 years ✓\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow can you tell if a heater valve is faulty?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeater stays warm all the time or reacts sluggishly to the temperature control\u003c\/li\u003e\n\u003cli\u003eHeat at idle, but the heater core goes cold at higher rpm (torn diaphragm)\u003c\/li\u003e\n\u003cli\u003eCoil open circuit: the valve stays open, the heater always runs at full output\u003c\/li\u003e\n\u003cli\u003eCoolant loss or leak at the valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe solenoid valve regulates how much hot coolant flows through the heater core. It is open when de-energized and is controlled by the heater controller: in the cold position it is energized and closed, in the warm position de-energized and open – the heater then runs at full output. Installation location: in the engine compartment on the bulkhead on a bracket, in the heater water line to the heater core; on vehicles with A\/C, an auxiliary water pump belongs to the same assembly.\u003c\/p\u003e\n\n\u003ch3\u003eFits the following BMW models\u003c\/h3\u003e\n\u003cp\u003eAccording to the BMW parts catalog for vehicles with A\/C and automatic heater control. Please compare the number on your own valve.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 12px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModel series\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px 6px;border-bottom:2px solid #242833;\"\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e5 Series E28 sedan (1981–1987)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e518 (M10), 518i (M10), 520i (M20), 525e (M20), 524d (M21), 524td (M21)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e5 Series E28 US version\u003c\/td\u003e\n\u003ctd style=\"padding:8px 6px;border-bottom:1px solid #e3e5e9;\"\u003e528e (M20), 524td (M21)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e 64 11 1 373 188 \/ 64111373188 (BMW) · 64 11 1 368 637 \/ 64111368637 (BMW predecessor, superseded) · 1 147 412 008 \/ 1147412008 (Bosch) · 90.944.01.109 \/ 9094401109 (Behr). Scope of delivery: see product images. The complete valve with housing is sold. Price is per pc; you will receive one unit in a condition comparable to the one pictured.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f6f8;border-left:4px solid #c69a3a;border-radius:8px;padding:14px 18px;margin:0 0 16px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-weight:700;\"\u003e⚠ Important: compare the part number before buying\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eNot compatible are E28 with six-cylinder M30 and the 6 Series E24: 525i, 528i, 533i, 535i, M535i, M5 and the E24 have valve 64 11 1 373 191 with a different position of the water connections. The complete valve with housing is sold, not just the valve insert 64 11 8 390 132. The double valve of the 7 Series E32 and 5 Series E34 is a different part.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:700;\"\u003eDoes not fit:\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003eE28 525i, 528i, 533i, 535i, M535i, M5 (64 11 1 373 191)\u003c\/li\u003e\n\u003cli\u003e6 Series E24\u003c\/li\u003e\n\u003cli\u003eSmall valve 64 21 1 368 650 with white angle fitting\u003c\/li\u003e\n\u003cli\u003e7 Series E32 and 5 Series E34\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part fit your car?\u003c\/strong\u003e Send us the VIN (chassis number) and model year – we'll check it for free: \u003ca href=\"tel:+491798991069\"\u003e+49 179 8991069\u003c\/a\u003e (Mon–Fri 8 am–6 pm) or via our \u003ca href=\"\/en\/pages\/contact?thema=Ersatzteil\"\u003econtact form\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eDoes the valve also fit an E28 525i or 528i?\u003c\/h4\u003e\n\u003cp\u003eNo. 525i, 528i, 533i, 535i, M535i, M5 and the 6 Series E24 have valve 64 11 1 373 191 with a different position of the water connections.\u003c\/p\u003e\n\u003ch4\u003eWhat warranty is provided?\u003c\/h4\u003e\n\u003cp\u003e5-year warranty on this refurbished part. If there is a problem, simply send the part in – we will repair or replace it. Plus a 60-day return policy and free shipping in Germany.\u003c\/p\u003e\n\u003ch4\u003eWill this part definitely fit my vehicle?\u003c\/h4\u003e\n\u003cp\u003eSend us your VIN before you buy. We will check it against the parts catalog and tell you with certainty whether this part fits.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/weitere-marken\"\u003eOther makes\u003c\/a\u003e · \u003ca href=\"\/en\/collections\/heizungsventile\"\u003eHeater valves \u0026amp; duo valves\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKFZTeile-Thot\u003c\/strong\u003e specialises in spare parts for Mercedes classic cars. Free shipping within Germany, 60-day return policy.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":55680533725513,"sku":"60935","price":269.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_7627c960-24ee-4dce-a5eb-6277925d1e8c.jpg?v=1792491520"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/collections\/57_8403b9a1-119e-4997-aab5-5f54e36eb441.jpg?v=1787153629","url":"https:\/\/kfzteile-thot.de\/en\/collections\/heizungsventile.oembed","provider":"KFZTeile-Thot","version":"1.0","type":"link"}