{"title":"DEF Pumps | Truck Parts Planet","description":"\u003cp\u003eDEF Pumps are essential components of modern diesel exhaust fluid systems, moving DEF from the tank to the dosing system so the SCR system can reduce nitrogen oxide emissions effectively. At Truck Parts Planet, we offer dependable DEF pump assemblies and related components for medium- and heavy-duty commercial trucks used in professional repair, replacement, and emissions-system maintenance.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eOur collection may include complete DEF pump modules, supply pumps, dosing pumps, pump assemblies, connectors, seals, mounting hardware, hoses, and related components used throughout the diesel exhaust fluid system. These parts work with DEF tanks, headers, injectors, NOx sensors, and SCR catalysts to support proper fluid delivery and aftertreatment performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eCommercial diesel trucks operate under demanding conditions where DEF system components are exposed to vibration, temperature changes, moisture, crystallized fluid deposits, and continuous operation. Over time, clogged, leaking, or malfunctioning DEF Pumps can contribute to low-pressure faults, warning lights, poor DEF dosing, SCR efficiency issues, diagnostic trouble codes, or engine derate conditions. Replacing a failed pump can help restore proper DEF flow and normal aftertreatment system operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eTruck Parts Planet carries DEF system parts 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 Pumps 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 pump.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e","products":[{"product_id":"s17h0e0042-genuine-oem-hino-24v-def-pump","title":"S17H0E0042 | Genuine OEM Hino 24V DEF Pump","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eS17H0E0042 | Genuine OEM Hino 24V Diesel Exhaust Fluid (DEF) Pump\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Hino Diesel Exhaust Fluid (DEF) Pump, part number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eS17H0E0042\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, is a 24V pump designed to deliver DEF within a compatible diesel exhaust aftertreatment system. It supports the Selective Catalytic Reduction (SCR) system, which uses DEF to help reduce nitrogen oxide emissions. Verify the part number, voltage, and vehicle configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePRODUCT INFORMATION\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePart Number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e S17H0E0042\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Hino\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePart Name:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Diesel Exhaust Fluid (DEF) Pump\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eComponent Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e DEF Pump\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eVoltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 24V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSystem:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Selective Catalytic Reduction (SCR) \/ Exhaust Aftertreatment\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCross Reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e S17H0-E0042\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCondition:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Confirm the actual condition of the item before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eAPPLICATIONS\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe Hino DEF pump is intended for compatible commercial vehicle applications using a 24V DEF delivery system. Exact vehicle and engine fitment for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eS17H0E0042\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e should be confirmed using the vehicle identification number (VIN), engine information, and the original pump part number.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDo not assume that similar-looking DEF pumps or related part numbers are interchangeable without confirmation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFUNCTION\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe DEF pump supplies and circulates Diesel Exhaust Fluid through the vehicle's aftertreatment system as required for SCR operation. Correct DEF delivery helps the emissions system operate as designed and supports the reduction of nitrogen oxide emissions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCOMMON SIGNS OF DEF PUMP FAILURE\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eA worn, damaged, or failing DEF pump may cause symptoms such as:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF pump or SCR system fault codes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDashboard emissions-system warning lights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReduced engine power or an engine derate.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF pressure or delivery faults.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIrregular DEF supply or dosing-system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFailure of the aftertreatment system to complete normal operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThese symptoms can have other causes, including clogged filters, damaged lines, faulty sensors, or wiring problems. Follow the manufacturer's diagnostic procedure before replacing the pump.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWHY REPLACE A HINO DEF PUMP?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eA functioning DEF pump is important for proper fluid delivery to the SCR aftertreatment system. Replacing a confirmed faulty pump with the correct 24V component can help restore DEF supply and support normal emissions-system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFITMENT INFORMATION\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBefore purchasing \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHino S17H0E0042\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, verify the part number and 24V specification against the existing pump. Confirm compatibility using the vehicle VIN, engine model, connector arrangement, and applicable OEM parts catalog.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe alternate format \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eS17H0-E0042\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is listed as a cross-reference for this part. Confirm that it matches your specific application before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eGENUINE HINO PART\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis listing identifies the product as a Hino 24V Diesel Exhaust Fluid (DEF) Pump, part number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eS17H0E0042\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Verify authenticity, condition, and included components against the actual item and its supporting documentation before publishing or purchasing.\u003c\/span\u003e\u003c\/p\u003e","brand":"Hino","offers":[{"title":"Default Title","offer_id":49898209509635,"sku":"S17H0E0042","price":1099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/HinoDieselExhaustFluid_DEF_Pump24V1.jpg?v=1792410488"},{"product_id":"5506957-genuine-oem-cummins-def-doser-pump-isxqsx","title":"5506957 | Genuine OEM Cummins DEF Doser Pump for ISX\/QSX","description":"\u003cp\u003e\u003cstrong\u003e5506957 | Genuine OEM Cummins DEF Doser Pump for ISX\/QSX\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5506957 Genuine OEM Cummins DEF Doser Pump is designed for compatible Cummins ISX and QSX diesel engine aftertreatment systems. It supports diesel exhaust fluid (DEF) dosing required for selective catalytic reduction (SCR) emissions control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePart Number: 5506957\u003cbr\u003eBrand: Cummins\u003cbr\u003eCondition: New\u003cbr\u003eComponent: DEF Doser Pump\u003cbr\u003eFuel Type: Diesel\u003cbr\u003eEngine Applications: ISX, QSX\u003cbr\u003eOther important specifications: Diesel exhaust fluid dosing system component\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5506957 DEF Doser Pump is intended for compatible Cummins ISX and QSX engine aftertreatment systems. Always verify the original part number and engine configuration before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe DEF Doser Pump supports the delivery of diesel exhaust fluid to the exhaust aftertreatment system. Proper DEF dosing helps the selective catalytic reduction (SCR) system reduce nitrogen oxide (NOx) emissions from diesel exhaust.\u003c\/p\u003e\n\u003cp\u003eA worn, damaged, or failing DEF Doser Pump may cause symptoms such as:\u003c\/p\u003e\n\u003cp\u003e• DEF dosing system fault codes\u003cbr\u003e• SCR system warning messages\u003cbr\u003e• Incorrect DEF delivery\u003cbr\u003e• Increased NOx emissions\u003cbr\u003e• Engine power derating\u003cbr\u003e• Reduced aftertreatment system performance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHY REPLACE A DEF DOSER PUMP?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA faulty DEF Doser Pump can disrupt the DEF supply required for proper SCR system operation. Replacing a worn or damaged 5506957 with the correct Genuine OEM Cummins component can help restore proper DEF dosing and support reliable emissions control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore purchasing the 5506957, verify the Part Number, VIN, vehicle model, engine, and configuration to help confirm compatibility.\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGENUINE CUMMINS PART\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePart Number: 5506957\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49923619717379,"sku":"5506957","price":1282.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/5506957_DEF_Doser_Pump_1.png?v=1792624728"},{"product_id":"4395016-genuine-oem-cummins-def-doser-pump-isxqsx","title":"4395016 | Genuine OEM Cummins DEF Doser Pump for ISX\/QSX","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e4395016\u003c\/span\u003e | Genuine OEM Cummins DEF Doser Pump for ISX\/QSX\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cspan\u003e4395016\u003c\/span\u003e Genuine OEM Cummins DEF Doser Pump is designed for compatible Cummins ISX and QSX diesel engine aftertreatment systems. It supports diesel exhaust fluid (DEF) dosing required for selective catalytic reduction (SCR) emissions control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePart Number: \u003cspan\u003e4395016\u003c\/span\u003e\u003cbr\u003eBrand: Cummins\u003cbr\u003eCondition: New\u003cbr\u003eComponent: DEF Doser Pump\u003cbr\u003eFuel Type: Diesel\u003cbr\u003eEngine Applications: ISX, QSX\u003cbr\u003eOther important specifications: Diesel exhaust fluid dosing system component\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cspan\u003e4395016\u003c\/span\u003e DEF Doser Pump is intended for compatible Cummins ISX and QSX engine aftertreatment systems. Always verify the original part number and engine configuration before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe DEF Doser Pump supports the delivery of diesel exhaust fluid to the exhaust aftertreatment system. Proper DEF dosing helps the selective catalytic reduction (SCR) system reduce nitrogen oxide (NOx) emissions from diesel exhaust.\u003c\/p\u003e\n\u003cp\u003eA worn, damaged, or failing DEF Doser Pump may cause symptoms such as:\u003c\/p\u003e\n\u003cp\u003e• DEF dosing system fault codes\u003cbr\u003e• SCR system warning messages\u003cbr\u003e• Incorrect DEF delivery\u003cbr\u003e• Increased NOx emissions\u003cbr\u003e• Engine power derating\u003cbr\u003e• Reduced aftertreatment system performance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHY REPLACE A DEF DOSER PUMP?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA faulty DEF Doser Pump can disrupt the DEF supply required for proper SCR system operation. Replacing a worn or damaged \u003cspan\u003e4395016\u003c\/span\u003e with the correct Genuine OEM Cummins component can help restore proper DEF dosing and support reliable emissions control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore purchasing the \u003cspan\u003e4395016\u003c\/span\u003e, verify the Part Number, VIN, vehicle model, engine, and configuration to help confirm compatibility.\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGENUINE CUMMINS PART\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePart Number: \u003cspan\u003e4395016\u003c\/span\u003e\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":49923764191491,"sku":"4395016","price":1282.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/4395016_DEF_Doser_Pump_1.jpg?v=1792625330"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/collections\/ChatGPT_Image_Sep_22_2026_06_35_47_PM.png?v=1790182737","url":"https:\/\/truckpartsplanet.com\/collections\/def-pumps.oembed","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}