{"product_id":"mercedes-kraftstoffpumpenrelais-kpr-a0035452505-w126-r107-420-500-560-sel-sec-sl","title":"Mercedes fuel pump relay KPR A0035452505 W126 R107 420 500 560 SEL SEC 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 (KPR) A 003 545 25 05 for Mercedes-Benz W126\/C126 and R107, production stage from 09\/1989 with a rev limit at 6000\/min.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#cfd3dc;\"\u003eGenuine relay  ·  Fits W126, C126 \u0026amp; R107 V8  ·  \u003cstrong style=\"color:#c69a3a;\"\u003eProduction stage from 09\/1989\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 for this component. The housing shows dust and storage marks, the labelling is fully legible, and the pins are slightly tarnished. No cracks, no signs of burning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eFunction and location\u003c\/h3\u003e\n\u003cp\u003eThe fuel pump relay switches the electric fuel pumps and the oxygen sensor heater, and only enables both while the engine is turning – if the engine speed signal is absent, delivery is cut off immediately. It also controls the cold-start enrichment via the cold start valve and limits engine speed by switching off fuel delivery at 6000\/min.\u003c\/p\u003e\n\u003cp\u003eThe relay is installed in the relay box in the engine bay, under the cover on the bulkhead. On the W126 and C126, it sits on the driver's side next to the overvoltage protection relay and the A\/C 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\u003e\n\u003cli\u003eThe fuel pump does not start – the engine does not start, or stalls again immediately\u003c\/li\u003e\n\u003cli\u003eThe cold start valve receives no signal – noticeably harder cold starts\u003c\/li\u003e\n\u003cli\u003eLambda sensor heater has no power\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCompatible vehicles\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMercedes-Benz W126 \/ C126 S-Class, V8 M116 and M117, production standard from 09\/1989, rev limit 6000\/min:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\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\u003e\u003cstrong\u003eMercedes-Benz R107 SL, V8 models from model year 1985:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e420 SL (107.047)\u003c\/li\u003e\n\u003cli\u003e500 SL (107.046)\u003c\/li\u003e\n\u003cli\u003e560 SL (107.048)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOriginal part number A 003 545 25 05 (KPR, production standard from 09\/1989). This number retroactively replaces the earlier versions 003 545 01 05 and 002 545 16 05.\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;\"\u003eThis number is the production standard from 09\/1989 and retroactively replaces the predecessors 003 545 01 05 and 002 545 16 05. Please compare the number on your old relay and the pin count 1:1 – this relay has ten occupied pins in a 12-pin housing.\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 W126 260 SE, 300 SE, 300 SEL – there 002 545 15 05, 002 545 27 05, 002 545 51 05, 002 545 52 05\u003c\/li\u003e\n\u003cli\u003eEarly square relays of the W126 from 09\/1979 to 08\/1985 (001 545 07 05, 001 545 16 05, 001 545 05 05, 001 545 34 05)\u003c\/li\u003e\n\u003cli\u003eW124 and W201 – there 003 545 24 05 and 003 545 19 05\u003c\/li\u003e\n\u003cli\u003eOvervoltage protection relay and kickdown\/A\/C relay 003 545 56 05 despite similar design\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\u003eIs this relay new or used?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThis is a used genuine relay. It is sold untested, as no test bench is available for this component; the housing shows dust and storage marks, the pins are slightly tarnished, but there are no cracks or scorch marks.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eDoes the relay also fit the 6-cylinder W126 or early model years?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The 6-cylinder W126 (260 SE, 300 SE, 300 SEL) requires different numbers (including 002 545 15 05, 002 545 27 05). The early square relays of the W126 from 09\/1979 to 08\/1985 are also different versions (including 001 545 07 05).\u003c\/p\u003e\n\u003cp style=\"margin:0 0 4px;\"\u003e\u003cstrong\u003eCan I replace the relay myself?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe relay is located in the relay box in the engine bay; on the W126 and C126 it sits on the driver's side next to the overvoltage protection and A\/C relays. If unsure, we recommend having it replaced by a specialist.\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":54960899490121,"sku":"90066","price":89.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0913\/5344\/8777\/files\/57_2cc20430-7675-461a-b344-587967cf0f26.jpg?v=1787304292","url":"https:\/\/kfzteile-thot.de\/en\/products\/mercedes-kraftstoffpumpenrelais-kpr-a0035452505-w126-r107-420-500-560-sel-sec-sl","provider":"KFZTeile-Thot","version":"1.0","type":"link"}