{"product_id":"dorman-def-injector-gasket-for-ford-ram-trucks-904-085-direct-fit-durable-seal","title":"Dorman DEF Injector Gasket for Ford \u0026 Ram Trucks — 904-085 Direct-Fit, Durable Seal","description":"\u003cstrong\u003eDorman 904-085 is a direct-fit diesel exhaust fluid (DEF) injector gasket designed to restore a factory-style seal when servicing DEF injectors on compatible Ford and Ram diesel trucks.\u003c\/strong\u003e\n\n\u003cp\u003eThis replacement gasket is engineered to match the form and function of the original equipment part so technicians and DIYers can reseal the DEF injector without guesswork. Manufactured from robust materials and validated through vehicle try-on testing, the gasket helps prevent leaks and maintains proper DEF system performance after injector maintenance. Verify fitment with your vehicle using the garage tool before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this gasket restore the DEF injector seal?\u003c\/h3\u003e\n\u003cp\u003eThe Dorman 904-085 reproduces the OEM gasket shape and sealing surfaces to re-establish a leak-free connection between the DEF injector and its mounting point. Correct sealing prevents DEF loss and helps maintain the injector’s operating environment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExact form replication for consistent compression and sealing\u003c\/li\u003e\n  \u003cli\u003eDurable material resists common DEF exposure and temperature cycles\u003c\/li\u003e\n  \u003cli\u003eVehicle try-on tested to ensure proper mating with injector components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I replace the DEF injector gasket?\u003c\/h3\u003e\n\u003cp\u003eAny time the DEF injector is removed or serviced, replace the gasket to ensure a reliable seal and avoid repeated labor. Aging, flattening, or cracking of the original gasket are signs it needs replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace after injector removal or repair\u003c\/li\u003e\n  \u003cli\u003eSwap if original gasket is brittle, flattened, or damaged\u003c\/li\u003e\n  \u003cli\u003ePreventative replacement during DEF system maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles does this Dorman gasket fit?\u003c\/h3\u003e\n\u003cp\u003e904-085 fits many modern Ford Super Duty and F-Series trucks and a wide range of Ram heavy-duty models across specific model years. Always enter your vehicle trim in the garage tool and confirm the \"Confirmed Fit\" indicator before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFord F-150 (2018–2021) and Super Duty F-250–F-750 models (selected years)\u003c\/li\u003e\n  \u003cli\u003eRam 2500, 3500, 4500, 5500 series (2013–2024 depending on model)\u003c\/li\u003e\n  \u003cli\u003eCheck the product page garage tool for exact fitment details and any notes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the quality highlights and installation tips?\u003c\/h3\u003e\n\u003cp\u003eDorman leverages over a century in replacement parts to produce components that meet workshop expectations for fit and durability. Simple installation usually accompanies injector service, but follow torque and cleanliness procedures to ensure the gasket seals correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured from materials selected for DEF exposure resistance\u003c\/li\u003e\n  \u003cli\u003eUnderwent vehicle try-on testing for accurate fitment\u003c\/li\u003e\n  \u003cli\u003eClean mounting surfaces and follow specified torque when reinstalling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Dorman 904-085 DEF injector gasket is intended for professional technicians, fleet maintenance managers, and knowledgeable DIY owners who service DEF systems on compatible Ford and Ram diesel trucks. If you’re performing injector removal or maintenance and need a dependable, direct-replacement gasket that mirrors OEM fit and function, this part provides a straightforward sealing solution — just confirm vehicle compatibility before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the Dorman 904-085 gasket an exact OEM match?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s designed as a direct replacement to match OEM fit and function, and it’s tested for proper vehicle fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to replace the gasket every time I service the DEF injector?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s recommended to replace the gasket whenever the injector is removed to ensure a reliable, leak-free seal.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":48085207285918,"sku":"B0FXJ1GHY1","price":35.36,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dorman-def-injector-gasket-front-view.jpg?v=1785867889","url":"https:\/\/northtrailauto.ca\/products\/dorman-def-injector-gasket-for-ford-ram-trucks-904-085-direct-fit-durable-seal","provider":"North Trail Auto","version":"1.0","type":"link"}