{"product_id":"mercedes-kraftstoffpumpenrelais-a0025453305-w126-420-500-560-sec-sel-r107-420-sl","title":"Mercedes fuel pump relay A0025453305 W126 420 500 560 SEC SEL R107 420 SL","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 fuel pump relay A0025453305 for Mercedes-Benz W126 420, 500 and 560 SE\/SEL\/SEC as well as R107 420 SL and 500 SL.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eGenuine component  ·  Housing intact, labeling legible  ·  \u003cstrong style=\"color:#c69a3a;\"\u003eFits W126 06\/1985–06\/1987 and R107 from 1986\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 genuine relay, sold untested as no test bench is available. Housing intact, labeling fully and clearly legible. The contact pins have a brass patina; slight verdigris traces show between two pins – clean before installation. Residual potting compound on the base rim, no rust, no cracks.\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;\"\u003eThe relay switches the electric fuel pumps together with the lambda sensor heater and only enables them as long as an engine speed signal is present – if the engine stops, fuel delivery is switched off immediately. It also limits engine speed at 6000\/min and links the cutoff via the kickdown circuit to the automatic transmission control. The housing print reads 8 Zyl., 6000\/min, KVS, Kickd.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eIt is installed in the engine bay on the passenger side, under the plastic cover of the relay box behind the battery, directly next to the overvoltage protection relay.\u003c\/p\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eHow can you tell if a fuel pump relay is faulty?\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 16px;padding-left:20px;\"\u003e\n\u003cli\u003eFuel pump does not start running, engine does not start or starts only with difficulty\u003c\/li\u003e\n\u003cli\u003eEngine suddenly dies at idle or under load\u003c\/li\u003e\n\u003cli\u003eLambda sensor heater remains non-functional, warm-up behavior deteriorates\u003c\/li\u003e\n\u003cli\u003eEngine speed is not limited at 6000\/min, or is limited irregularly\u003c\/li\u003e\n\u003cli\u003eAutomatic transmission kickdown does not shift cleanly\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 4px;font-weight:700;\"\u003eMercedes-Benz W126 \/ C126 S-Class, V8 M116 and M117, 06\/1985–06\/1987:\u003c\/p\u003e\n\u003cul style=\"margin:0 0 16px;padding-left:20px;\"\u003e\n\u003cli\u003e420 SE, 420 SEL (126.034, 126.035)\u003c\/li\u003e\n\u003cli\u003e420 SEC (126.043)\u003c\/li\u003e\n\u003cli\u003e500 SE, 500 SEL (126.036, 126.037)\u003c\/li\u003e\n\u003cli\u003e500 SEC (126.044)\u003c\/li\u003e\n\u003cli\u003e560 SE, 560 SEL (126.038, 126.039)\u003c\/li\u003e\n\u003cli\u003e560 SEC (126.045)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:12px 0 4px;font-weight:700;\"\u003eMercedes-Benz R107 SL, model year from 1986:\u003c\/p\u003e\n\u003cul style=\"margin:0 0 16px;padding-left:20px;\"\u003e\n\u003cli\u003e420 SL (107.047)\u003c\/li\u003e\n\u003cli\u003e500 SL (107.046)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003e\u003cstrong\u003ePart numbers at a glance:\u003c\/strong\u003e Main number A0025453305, valid 06\/1985–06\/1987. Successor versions: 002 545 16 05 (from 08\/1987, lowered temperature threshold), 003 545 18 05, 003 545 01 05 and 003 545 25 05. For other engine variants: 001 545 91 05 and 002 545 27 05 (6-cylinder), 002 545 20 05 (4-cylinder, 6200\/min), 003 545 56 05 (W124 A\/C\/kickdown relay), 001 545 34 05 and 001 545 04 05 (early 8-cylinder versions).\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;\"\u003eThe final number is decisive. This version covers the period 06\/1985 to 06\/1987. From 08\/1987, 002 545 16 05 followed with a lowered temperature threshold, along with 003 545 18 05, 003 545 01 05 and 003 545 25 05. Please compare the print on your old relay 1:1 – 8 Zyl. and 6000\/min must match.\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\u003e6-cylinder vehicles – there 001 545 91 05 and 002 545 27 05\u003c\/li\u003e\n\u003cli\u003e4-cylinder vehicles – there 002 545 20 05 with 6200\/min\u003c\/li\u003e\n\u003cli\u003e380 SE, 380 SEL, 380 SEC and 380 SL before 06\/1985\u003c\/li\u003e\n\u003cli\u003eW124 A\/C and kickdown relay 003 545 56 05\u003c\/li\u003e\n\u003cli\u003eEarly 8-cylinder relays 001 545 34 05 and 001 545 04 05\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\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\"\u003e0179 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 exact scope of delivery is shown in the product photos.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eHow do I know if this relay fits my vehicle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eCompare the print on your old relay with “8 Zyl., 6000\/min, KVS, Kickd.”. This version applies to the period 06\/1985 to 06\/1987; different end numbers were used afterward. If unsure, send us the VIN and model year for a free check.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eWas the relay tested for function?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo, it is sold as a used genuine relay, untested, as no test bench is available. Visually the condition is good: housing intact, labeling fully legible, no cracks; the contact pins should be cleaned before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRelated categories:\u003c\/strong\u003e \u003ca href=\"\/en\/collections\/relais\"\u003eRelays\u003c\/a\u003e  ·  \u003ca href=\"\/en\/collections\/w126\"\u003eW126\u003c\/a\u003e  ·  \u003ca href=\"\/en\/collections\/w107-r107\"\u003eW107 \/ R107\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":54960900014409,"sku":"90067","price":89.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_b97bafba-9a7f-46fb-9025-a965a5d0f9d6.jpg?v=1787304297","url":"https:\/\/kfzteile-thot.de\/en\/products\/mercedes-kraftstoffpumpenrelais-a0025453305-w126-420-500-560-sec-sel-r107-420-sl","provider":"KFZTeile-Thot","version":"1.0","type":"link"}