{"title":"DEF Injectors | Truck Parts Planet","description":"\u003cp\u003eDEF Injectors are critical components of modern diesel aftertreatment systems, delivering a controlled amount of diesel exhaust fluid into the exhaust stream before the SCR catalyst. At Truck Parts Planet, we offer dependable DEF dosing components for medium- and heavy-duty commercial trucks used in professional repair, replacement, diagnostics, and emissions-system maintenance.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eOur collection may include DEF dosing injectors, doser valves, injector assemblies, mounting hardware, seals, gaskets, connectors, and related components used throughout the selective catalytic reduction system. These parts work with DEF pumps, NOx sensors, SCR catalysts, temperature sensors, and electronic controls to support proper emissions treatment.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eCommercial diesel trucks operate under demanding conditions where aftertreatment components are exposed to extreme heat, vibration, soot, crystallized DEF deposits, moisture, and continuous thermal cycling. Over time, clogged, leaking, or malfunctioning DEF Injectors can contribute to warning lights, poor DEF dosing, SCR efficiency faults, increased emissions, diagnostic trouble codes, or engine derate conditions. Replacing a failed injector can help restore proper DEF delivery and normal aftertreatment system operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eTruck Parts Planet carries DEF and emissions components for many popular commercial truck makes and heavy-duty diesel engine platforms. Product listings include available OEM or manufacturer part numbers, specifications, connector details, compatibility information, and clear product photos to help customers identify the correct replacement before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eOur selection is suitable for owner-operators, fleet maintenance departments, diesel repair facilities, emissions specialists, and professional technicians servicing commercial vehicle aftertreatment systems. Many products are stocked in our USA warehouse for fast order processing and convenient nationwide shipping.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eBrowse DEF Injectors at Truck Parts Planet to find reliable replacement components for your commercial truck emissions system. If you are unsure about compatibility, contact us with your truck model, engine information, VIN, or existing part number, and our team can help you identify the appropriate injector.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e","products":[{"product_id":"2888173-genuine-oem-cummins-def-doser-injector","title":"2888173 | Genuine OEM Cummins DEF Doser Injector","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cstrong\u003e\u003cspan\u003e2888173 | Genuine OEM Cummins DEF Doser Injector\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2888173 Genuine OEM Cummins DEF Doser Injector is a component designed for use in a compatible diesel engine aftertreatment system. It delivers diesel exhaust fluid (DEF) into the exhaust aftertreatment system to support emissions control. The exact application should be verified using the original part number and engine specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePRODUCT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 2888173\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: Cummins\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: Genuine OEM\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 specified\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOther important specifications: Diesel exhaust fluid dosing component\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAPPLICATIONS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 2888173 Cummins DEF Doser Injector is intended for compatible Cummins diesel engine aftertreatment systems that require this specific component. Exact applications may vary depending on the engine model, emissions system, vehicle configuration, and production specifications. Verify compatibility using the original part number and vehicle information before purchasing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFUNCTION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe DEF Doser Injector delivers diesel exhaust fluid into the exhaust aftertreatment system as part of the emissions reduction process. Proper fluid dosing supports the operation of the selective catalytic reduction (SCR) system, where equipped, helping reduce nitrogen oxide (NOx) emissions. Correct operation depends on compatibility with the specific engine and aftertreatment configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA worn, damaged, or failing DEF Doser Injector may cause symptoms such as:\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e• Aftertreatment system warning lights\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Diagnostic trouble codes\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Incorrect DEF dosing\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• SCR system performance issues\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Increased emissions\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Engine derate or warning messages, depending on the vehicle system\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWHY REPLACE A DEF DOSER INJECTOR?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA damaged or malfunctioning DEF Doser Injector can interfere with the delivery of diesel exhaust fluid and affect aftertreatment system performance. Incorrect dosing may trigger emissions-related faults and affect the operation of the SCR system. Replacing a faulty injector with the correct Genuine OEM Cummins DEF Doser Injector can help restore proper fluid delivery and support normal emissions control operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFITMENT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBefore purchasing, verify the Part Number, VIN, vehicle model, engine, and configuration to confirm the correct application. DEF Doser Injector compatibility may vary by engine family, emissions standard, and aftertreatment system. Do not assume compatibility based only on the appearance of the part.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\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\u003e\u003cstrong\u003e\u003cspan\u003eGENUINE CUMMINS PART\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 2888173\u003c\/span\u003e\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49755810464003,"sku":"SY1050","price":208.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/2888173_Def_Doser_Injector_1.png?v=1791757871"},{"product_id":"2880277-genuine-oem-cummins-aftertreatment-doser-injector-kit","title":"2880277 | Genuine OEM Cummins Aftertreatment Doser Injector Kit","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e2880277 | Genuine OEM Cummins Aftertreatment Doser Injector Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e2880277 Genuine OEM Cummins Aftertreatment Doser Injector Kit is a component designed for use in an engine aftertreatment system. This doser injector kit helps deliver the required fluid into the aftertreatment system for proper emissions control operation.\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: 2880277\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: Cummins\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: Genuine OEM\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eComponent: Aftertreatment Doser Injector Kit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFuel Type: Not specified\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eEngine Applications: Not specified\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOther important specifications: Aftertreatment system component\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 2880277 Aftertreatment Doser Injector Kit is intended for applicable Cummins engine aftertreatment systems. Exact fitment should be confirmed using the original part number and vehicle information.\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 2880277 doser injector kit is designed to deliver fluid into the engine aftertreatment system as part of the emissions control process. Proper operation helps support the intended function of the aftertreatment system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA worn, damaged, or failing Aftertreatment Doser Injector Kit may cause symptoms such as:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e• Aftertreatment system performance issues\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Emissions-related warning lights\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Diagnostic trouble codes\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Improper fluid dosing\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Reduced emissions system efficiency\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Engine or aftertreatment system performance issues\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWHY REPLACE AN AFTERTREATMENT DOSER INJECTOR KIT?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA damaged or malfunctioning doser injector can affect fluid delivery and proper aftertreatment system operation. Replacing it with the correct Genuine OEM Cummins component can help restore proper dosing and support normal emissions control system function.\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, verify the Part Number, VIN, vehicle model, engine, and configuration to confirm the correct application. Do not assume compatibility based only on the appearance of the 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\u003e\u003cspan\u003eGENUINE CUMMINS PART\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 2880277\u003c\/span\u003e\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49762186395907,"sku":"2880277","price":546.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/2880277_Aftertreatment_Doser_Injecto_1.png?v=1791239420"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/collections\/ChatGPT_Image_Sep_22_2026_09_12_33_PM.png?v=1790182695","url":"https:\/\/truckpartsplanet.com\/collections\/def-injectors.oembed","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}