{"product_id":"5578983-genuine-oem-cummins-def-doser-injector","title":"5578983 | Genuine OEM Cummins DEF Doser Injector","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e5578983 | Genuine OEM Cummins DEF Doser Injector\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 5578983 Genuine OEM Cummins DEF Doser Injector is a component of the diesel exhaust fluid (DEF) aftertreatment system. It is designed to deliver DEF into the exhaust stream to support selective catalytic reduction (SCR) and emissions control. Verify the part number and application before purchasing to ensure compatibility with your vehicle.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003ePRODUCT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePart Number: 5578983\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: Cummins\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: New\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: Not confirmed\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOther Specifications: Diesel exhaust fluid injection component for the aftertreatment system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 5578983 DEF Doser Injector is intended for compatible Cummins aftertreatment systems. Specific engine models, vehicle applications, and configurations have not been confirmed. Check the original part number and vehicle specifications before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe DEF Doser Injector delivers diesel exhaust fluid into the exhaust stream, where it supports the selective catalytic reduction (SCR) system. This process helps reduce nitrogen oxide (NOx) emissions. Proper DEF dosing is essential for the aftertreatment system to function as designed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eA worn, damaged, or failing DEF Doser Injector may cause symptoms such as:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eDEF dosing or injection problems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSCR system performance issues\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck engine light or aftertreatment warning lights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased NOx emissions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDEF system fault codes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEmissions system performance warnings\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eWHY REPLACE A DEF DOSER INJECTOR?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA faulty DEF Doser Injector can interfere with proper fluid delivery and emissions control. Replacing a defective injector with the correct compatible part can help restore proper DEF dosing and support the SCR system's intended operation. Additional diagnostics may be necessary to identify related aftertreatment system faults.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore purchasing the 5578983 DEF Doser Injector, verify the Part Number, VIN, vehicle model, engine, and aftertreatment system configuration. Compatibility may vary by vehicle and engine application. Do not rely on appearance alone when selecting a replacement part.\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\u003eGENUINE CUMMINS PART\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 5578983\u003c\/span\u003e\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49783366877443,"sku":"5578983","price":569.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/5578983_Doser_Injector_1.png?v=1791583857","url":"https:\/\/truckpartsplanet.com\/products\/5578983-genuine-oem-cummins-def-doser-injector","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}