{"product_id":"4377650-genuine-oem-cummins-def-doser-injector","title":"4377650 | Genuine OEM Cummins DEF Doser Injector","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e4377650 | Genuine OEM Cummins DEF Doser Injector\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 4377650 Genuine OEM Cummins DEF Doser Injector is a component of the diesel exhaust fluid (DEF) dosing system. It delivers DEF into the exhaust aftertreatment system to support selective catalytic reduction (SCR) and emissions control.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003ePRODUCT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePart Number: 4377650\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: Cummins\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: Not specified\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eComponent: DEF Doser Injector\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFuel Type: Diesel\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eEngine Applications: Cummins ISB and QSB engines\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOther Specifications: DEF dosing component for the SCR aftertreatment system\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAPPLICATIONS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 4377650 DEF Doser Injector is associated with Cummins ISB and QSB engine applications. Actual compatibility depends on the engine configuration and emissions system. Verify the original part number before purchasing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFUNCTION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe DEF doser injector introduces diesel exhaust fluid into the exhaust stream. The fluid supports the SCR system in reducing nitrogen oxide (NOx) emissions as part of the engine's exhaust aftertreatment process.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA worn, damaged, or failing DEF doser injector may cause symptoms such as:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDEF dosing system fault codes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck engine or emissions warning lights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSCR system efficiency faults\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExcessive DEF consumption\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDEF crystallization or deposits around the dosing area\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduced engine power or engine derate\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWHY REPLACE A DEF DOSER INJECTOR?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA faulty DEF doser injector can interfere with correct fluid delivery and affect exhaust aftertreatment performance. Replacing a confirmed defective injector with the correct part can help restore proper DEF dosing and support SCR system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFITMENT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore purchasing the 4377650 DEF Doser Injector, verify the Part Number, VIN, vehicle model, engine, and emissions system configuration. Part number supersessions and variations may exist, so confirm that this part matches your original equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original part number. We are happy to help verify compatibility before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eGENUINE CUMMINS PART\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 4377650\u003c\/span\u003e\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49778959155459,"sku":"4377650","price":569.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/4377650_Doser_Injector_5.jpg?v=1791505874","url":"https:\/\/truckpartsplanet.com\/products\/4377650-genuine-oem-cummins-def-doser-injector","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}