{"product_id":"audi-3-pin-2-5mm-high-pressure-fuel-pump-connector-oem-4d0971993a","title":"Audi 3-Pin 2.5mm High-Pressure Fuel Pump Waterproof Connector – OEM 4D0971993A \/ 4D0971993","description":"\u003ch2\u003eAudi 3-Pin 2.5mm High-Pressure Fuel Pump Waterproof Connector – OEM 4D0971993A \/ 4D0971993\u003c\/h2\u003e\n\u003cp\u003eDirect OEM-specification replacement for the 3-pin waterproof wire harness connector used on high-pressure fuel pumps (HPFP) across Audi platforms. Cross-references Audi OEM part numbers \u003cstrong\u003e4D0971993A\u003c\/strong\u003e and \u003cstrong\u003e4D0971993\u003c\/strong\u003e (also written as \u003cstrong\u003e4D0 971 993A\u003c\/strong\u003e). Uses the \u003cstrong\u003e2.5mm contact series\u003c\/strong\u003e in female housing with waterproof sealing — designed for direct injection high-pressure fuel pump applications on Audi’s V6, V8, and W12 engine platforms where fuel pressure and heat resistance are critical.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Problem Does This Connector Solve?\u003c\/h3\u003e\n\u003cp\u003eThe 3-pin high-pressure fuel pump connector is located in the engine bay, directly on the HPFP body. On direct injection engines, the HPFP operates at pressures of 50–200 bar and generates significant heat. The connector is exposed to fuel vapour, heat cycling, and vibration from the pump. A failed connector causes the HPFP to lose its control signal, resulting in \u003cstrong\u003elow fuel pressure fault codes\u003c\/strong\u003e (P0087, P0191), hard starting, rough running, and potential no-start conditions. On Audi V8 and W12 engines, the HPFP connector is also frequently damaged during engine bay work due to its location beneath the intake manifold.\u003c\/p\u003e\n\n\u003ch3\u003eOEM Part Number Cross-Reference\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eOEM Number\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4D0971993A\u003c\/td\u003e\n\u003ctd\u003eAudi 3-pin HPFP connector (primary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4D0971993\u003c\/td\u003e\n\u003ctd\u003eAudi 3-pin HPFP connector (superseded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e3-Pin Circuit Function (High-Pressure Fuel Pump)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eFailure Symptom if Open\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eHPFP solenoid power supply (12V)\u003c\/td\u003e\n\u003ctd\u003ePump inoperative, P0087 low fuel pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eHPFP solenoid ground\u003c\/td\u003e\n\u003ctd\u003ePump inoperative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eECM control signal (PWM)\u003c\/td\u003e\n\u003ctd\u003eFuel pressure not regulated, P0191\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e3-Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Series\u003c\/td\u003e\n\u003ctd\u003e2.5mm pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGender\u003c\/td\u003e\n\u003ctd\u003eFemale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSealing\u003c\/td\u003e\n\u003ctd\u003eWaterproof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e4D0971993A \/ 4D0971993\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eHigh-pressure fuel pump (HPFP), direct injection fuel system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Models\u003c\/td\u003e\n\u003ctd\u003eAudi A6 C5 \/ A8 D2 \/ A8 D3 (4.2 V8, 6.0 W12); Audi S6 \/ S8 \/ RS6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudi A6 C5 (4B) 4.2 V8\u003c\/strong\u003e – High-pressure fuel pump connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudi A8 D2 (4D) \/ A8 D3 (4E) 4.2 V8 \/ 6.0 W12\u003c\/strong\u003e – HPFP harness connector (OEM 4D0971993A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudi S6 \/ S8 \/ RS6 (C5)\u003c\/strong\u003e – High-pressure fuel pump connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: My Audi A8 has a P0087 low fuel pressure fault — could it be the HPFP connector?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A corroded or open 3-pin HPFP connector is a common cause of P0087 on Audi V8 and W12 engines. Inspect the connector before replacing the high-pressure fuel pump, which is a significantly more expensive repair.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are terminals included?\u003c\/strong\u003e\u003cbr\u003eA: Yes, terminals are included with all variants.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"female \/ 1 set","offer_id":47838186242293,"sku":"14:200004889#female;200001249:202408827#1 set","price":16.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/S6a1cd4bf01c2478b82cf6147a0c56fafK.webp?v=1773727590","url":"https:\/\/www.csldmcml.com\/products\/audi-3-pin-2-5mm-high-pressure-fuel-pump-connector-oem-4d0971993a","provider":"Cable Parts Online","version":"1.0","type":"link"}