{"product_id":"3pcs-fuel-injector-wiring-harness-3966805-for-03-05-5-9l-dodge-cummins-diesel","title":"3PCS Fuel Injector Wiring Harness 3966805 for 03-05 5.9L Dodge Cummins Diesel","description":"\u003cp\u003eThis Fuel Injector Wiring Harness is a fuel injector wiring harness compatible with for Dodge vehicles and references part number(s) 3966805. \u003c\/p\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Fuel Injector Wiring Harness for 2003-2005 Dodge Cummins 5.9L Diesel engines is an essential under-valve-cover replacement component that restores a reliable electrical connection to your vehicle's fuel injectors. Over time, original factory harnesses are subject to intense heat, engine oil, and vibration, which often lead to brittle wires and intermittent connection failures. This high-quality replacement kit contains three separate harnesses, ensuring a direct fit and full engine restoration to eliminate misfires or rough idling caused by degraded wiring networks.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit replacement ensures identical dimensions and straightforward connection\u003c\/li\u003e\n\u003cli\u003eConstructed from high-quality materials to resist damage from hot engine oil and vibrations\u003c\/li\u003e\n\u003cli\u003eRestores proper electrical delivery to common-rail fuel injectors\u003c\/li\u003e\n\u003cli\u003eHelps eliminate engine misfires, rough idling, and associated diagnostic codes\u003c\/li\u003e\n\u003cli\u003eSupplied as a 3-piece kit to completely refresh the fuel injector wiring network\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003efor Dodge Ram 2500 5.9L Cummins Diesel 2003-2005\u003c\/li\u003e\n\u003cli\u003efor Dodge Ram 3500 5.9L Cummins Diesel 2003-2005\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacing brittle or failed factory wiring harnesses under the valve cover\u003c\/li\u003e\n\u003cli\u003eFixing electrical issues that cause dead injectors or rough running conditions\u003c\/li\u003e\n\u003cli\u003ePerforming complete engine fuel system overhauls during injector upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fuel Injector Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 3966805\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Number(s):\u003c\/strong\u003e 3957309, 05139865AA, 05086965AA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand Compatibility:\u003c\/strong\u003e for Dodge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e 5.9L Cummins Diesel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 3 Pieces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I verify if this harness kit will fit my truck? \u003cstrong\u003eA:\u003c\/strong\u003e This 3-piece harness set is specifically designed for 2003 through 2005 Dodge Ram trucks equipped with the 5.9L Cummins diesel engine; please cross-reference part number 3966805 before purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Why does this component need to be replaced? \u003cstrong\u003eA:\u003c\/strong\u003e Because these sub-harnesses are located beneath the valve cover, constant exposure to thermal stress, engine vibration, and lubrication oil can break down the wire insulation over time, resulting in failed electrical signals.\u003c\/p\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.\u003c\/em\u003e","brand":"Northline Parts","offers":[{"title":"Default Title","offer_id":43043422732359,"sku":"ZZ1Q00345","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/7123\/5399\/files\/116709047693-1.jpg?v=1785976979","url":"https:\/\/www.northlineparts.com\/products\/3pcs-fuel-injector-wiring-harness-3966805-for-03-05-5-9l-dodge-cummins-diesel","provider":"Northline Parts","version":"1.0","type":"link"}