{"title":"DEF Doser","description":"\u003ch2\u003eGenuine OEM DEF Doser Injectors\u003c\/h2\u003e\n\u003cp\u003eA failing DEF doser injector can disrupt fluid delivery to the SCR catalyst, trigger emissions fault codes, and force the engine into a derate. Because the doser must meter and inject diesel exhaust fluid at precise intervals and quantities, a wrong or generic replacement often leads to over- or under-dosing, catalyst damage, or a fault code that won't clear. That's why every DEF doser in this collection is genuine OEM, matched to the manufacturer's original part number.\u003c\/p\u003e\n\u003ch3\u003eWhat's in this category\u003c\/h3\u003e\n\u003cp\u003eThis collection covers genuine OEM DEF doser components, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDEF doser injectors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— precision injectors that meter and deliver diesel exhaust fluid into the exhaust stream for SCR system operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDEF doser injector SCR modules\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— integrated assemblies combining the doser injector and SCR control module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBrands \u0026amp; engines we cover\u003c\/h3\u003e\n\u003cp\u003eThis collection includes genuine OEM DEF doser injectors for Paccar and Cummins engines (B6.7, L9, X12, X15) — and more, with new listings added regularly.\u003c\/p\u003e\n\u003ch3\u003eWhy order your DEF doser here\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM only\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— every injector is matched to the manufacturer's original part number, not a generic equivalent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for accurate fitment\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— listings include the exact OEM number and engine application so you can verify the right part before you buy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast turnaround\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— ships quickly to restore emissions compliance and keep your engine out of derate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"def-doser-faq\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eWhat does a DEF doser injector do?\u003c\/em\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt meters and injects diesel exhaust fluid into the exhaust stream at precise intervals, triggering the chemical reaction in the SCR catalyst that converts nitrogen oxides into harmless nitrogen and water vapor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eSigns of a failing DEF doser injector?\u003c\/em\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEmissions fault codes, unexpected derate, excessive or insufficient DEF consumption, a check engine light tied to the aftertreatment system, or visible DEF crystallization around the injector tip.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eGenuine OEM or aftermarket?\u003c\/em\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll parts here are genuine OEM — no generic substitutes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eHow do I find the right DEF doser?\u003c\/em\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMatch the OEM number on your old injector, or check your service manual for the correct reference and engine configuration, then search that number above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eBrowse the full selection below, or search by OEM part number to find your exact match.\u003c\/p\u003e","products":[{"product_id":"5508583-genuine-cummins-def-doser-injector-for-b6-7-l9-x12-x15-engines","title":"5508583 Genuine Cummins DEF Doser Injector For B6.7 L9 X12 X15 Engines","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe 5508583 is a genuine Cummins DEF Doser Injector designed for B6.7, L9, X12, and X15 engine applications using listed Cummins control module configurations. This injector operates within the diesel exhaust fluid dosing system, metering DEF into the aftertreatment stream for correct emissions system operation.\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 5508583 DEF Doser Injector is manufactured to Cummins factory specifications for DEF dosing control.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMeters diesel exhaust fluid into the aftertreatment system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSupports SCR emissions system operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfigured for listed Cummins engine control modules\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eApplies to B6.7 L9 X12 and X15 engine platforms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaintains DEF delivery through the dosing circuit\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBuilt for factory aftertreatment system compatibility\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eGeneral Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable style=\"height: 156.4px; width: 100% !important; table-layout: fixed !important; display: table !important;\" class=\"product-table\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width: 29.6663%;\"\u003e\n\u003ccol style=\"width: 70.1483%;\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5508583\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCummins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB6.7 CM2350 B121B, B6.7 CM2450 B155B, L9 CM2450 L126B, X12 CM2450 X137B, X15 CM2450 X124B, X15 CM2450 X134B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiesel Exhaust Fluid System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0 Ibs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe 5508583 DEF Doser Injector should be matched to the correct engine and aftertreatment configuration before installation. Inspect DEF lines, electrical connections, and related SCR system components during service.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eVerify part number, VIN, engine configuration, production date, emissions package, and applicable factory options before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":43253874950207,"sku":"5508583","price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/57_f7077f3d-9544-48e2-abca-d62e4419347c.jpg?v=1778643496"},{"product_id":"2871878-genuine-cummins-def-doser-injector-for-cummins-paccar-applications","title":"2871878 Genuine Cummins DEF Doser Injector","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe 2871878 is a genuine Cummins DEF Doser Injector designed for Cummins and Paccar diesel engine applications. This dosing valve operates within the diesel exhaust fluid system, injecting DEF into the exhaust stream ahead of the SCR catalyst for emissions system operation.\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp\u003eThe 2871878 DEF Doser Injector is manufactured to Cummins factory specifications for diesel exhaust fluid dosing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInjects diesel exhaust fluid into the exhaust stream\u003c\/li\u003e\n\u003cli\u003eOperates ahead of the SCR catalyst\u003c\/li\u003e\n\u003cli\u003eSupports DEF dosing system function\u003c\/li\u003e\n\u003cli\u003eApplies to Cummins and Paccar diesel applications\u003c\/li\u003e\n\u003cli\u003eUsed in heavy duty diesel engine service\u003c\/li\u003e\n\u003cli\u003eSupports aftertreatment operation on class 8 truck platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable style=\"height: 156.4px; width: 100% !important; table-layout: fixed !important; display: table !important;\" class=\"product-table\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 29.6663%;\"\u003e \u003ccol style=\"width: 70.1483%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2871878\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCummins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe 2871878 DEF Doser Injector should be matched to the correct Cummins or Paccar engine application before installation. Inspect the DEF line, electrical connector, mounting area, and SCR aftertreatment components during service.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eVerify part number, VIN, engine configuration, production date, emissions package, and applicable factory options before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":43253874982975,"sku":"2871878","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/2871878_1_563x563_4e28b26f-3089-45ff-9f5b-4c81ec640f0c.jpg?v=1783319453"},{"product_id":"2272104pex-genuine-paccar®-def-doser-injector-scr","title":"2272104PEX Genuine Paccar DEF Doser Injector SCR Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"81\" data-end=\"481\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 2272104PEX is a genuine Paccar DEF Doser Injector SCR designed for diesel exhaust fluid dosing system applications. This DEF doser injector operates within the SCR emissions system by spraying DEF into the exhaust stream to support NOx reduction during after-treatment operation. \u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003csection data-turn=\"assistant\" data-testid=\"conversation-turn-34\" data-turn-id-container=\"request-WEB:b5e1bfad-6bed-4dc7-bd14-254f34a2591e-25\" data-turn-id=\"request-WEB:b5e1bfad-6bed-4dc7-bd14-254f34a2591e-25\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-5-thinking\" dir=\"auto\" data-message-id=\"1ff028b5-c1f5-45af-9b3a-039db7311bbf\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\" data-end=\"964\" data-start=\"830\"\u003eThe 2272104PEX DEF Doser Injector SCR is manufactured to Paccar factory specifications for DEF dosing within the SCR emissions system.\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-end=\"1514\" data-start=\"966\"\u003e\n\u003cli data-end=\"1039\" data-start=\"966\"\u003eDelivers DEF into the exhaust stream for SCR after-treatment operation.\u003c\/li\u003e\n\u003cli data-end=\"1123\" data-start=\"1040\"\u003eSupports NOx reduction by supplying diesel exhaust fluid to the emissions system.\u003c\/li\u003e\n\u003cli data-end=\"1178\" data-start=\"1124\"\u003eDesigned for SCR 2.2 DEF dosing system applications.\u003c\/li\u003e\n\u003cli data-end=\"1245\" data-start=\"1179\"\u003eIncludes a gasket for the doser injector installation interface.\u003c\/li\u003e\n\u003cli data-end=\"1327\" data-start=\"1246\"\u003eApplies to Paccar MX13 platform truck applications listed in the supplied data.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1514\" data-start=\"1429\"\u003eProvides the DEF injection function required for factory exhaust emissions control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable class=\"product-table\" style=\"height: 68.8px; width: 100% !important; table-layout: fixed !important; display: table !important;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width: 29.5666%;\"\u003e\n\u003ccol style=\"width: 70.1238%;\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2272104PEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector SCR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp data-end=\"2317\" data-start=\"2065\"\u003eThe 2272104PEX should be installed at the specified SCR dosing location using the supplied gasket and verified for proper sealing at the mounting surface. Inspect the DEF line connection and electrical interface before returning the vehicle to service.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\" data-end=\"2473\" data-start=\"2319\"\u003eVerify part number, VIN, engine configuration, production date, emissions package, and applicable factory options before installation.\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":43455345066047,"sku":"2272104PEX","price":648.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/57_9dd3d3f5-dcbf-4ef6-a1b0-7409b645a32c.jpg?v=1782395830"},{"product_id":"5508583rx-genuine-cummins-def-doser-injector","title":"5508583RX Genuine Cummins DEF Doser Injector","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"84\" data-end=\"436\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 5508583RX is a genuine Cummins DEF doser injector designed for compatible diesel exhaust fluid system applications including B6.7, L9, X12, and X15 engine platforms. It injects DEF into the exhaust aftertreatment system to support Selective Catalytic Reduction (SCR) operation by providing controlled fluid delivery for emissions system management.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp data-start=\"465\" data-end=\"592\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 5508583RX DEF doser injector is manufactured to Cummins specifications for diesel exhaust fluid injection system operation.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-start=\"594\" data-end=\"1019\"\u003e\n\u003cli data-start=\"594\" data-end=\"664\"\u003eInjects DEF into the exhaust aftertreatment system during operation.\u003c\/li\u003e\n\u003cli data-start=\"665\" data-end=\"731\"\u003eControls diesel exhaust fluid delivery for SCR system functions.\u003c\/li\u003e\n\u003cli data-start=\"732\" data-end=\"801\"\u003eSupports DEF dosing requirements across compatible Cummins engines.\u003c\/li\u003e\n\u003cli data-start=\"802\" data-end=\"872\"\u003eIntegrates with factory emissions system components and connections.\u003c\/li\u003e\n\u003cli data-start=\"873\" data-end=\"946\"\u003eMaintains controlled fluid flow during aftertreatment operation cycles.\u003c\/li\u003e\n\u003cli data-start=\"947\" data-end=\"1019\"\u003eAssists proper NOx reduction system performance through DEF injection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eGeneral Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable style=\"height: 156.4px; width: 100% !important; table-layout: fixed !important; display: table !important;\" class=\"product-table\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 29.6663%;\"\u003e \u003ccol style=\"width: 70.1483%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5508583RX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCummins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB6.7 CM2350 B121B, B6.7 CM2450 B155B, L9 CM2450 L126B, X12 CM2450 X137B, X15 CM2450 X124B, X15 CM2450 X134B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiesel Exhaust Fluid System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0 Ibs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe 5508583RX should be installed after inspecting the DEF injector mounting area, electrical connector, DEF supply connection, and exhaust dosing port for contamination or damage that could affect injection performance. After installation, verify proper DEF flow, confirm secure connector engagement, and check the aftertreatment system for correct operation using the required diagnostic procedures.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eAlways verify the part number, engine model, DEF system configuration, and aftertreatment application before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":43507050545215,"sku":"5508583RX","price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/57_f7077f3d-9544-48e2-abca-d62e4419347c.jpg?v=1778643496"},{"product_id":"5508583nx-genuine-cummins-def-doser-injector","title":"5508583NX Genuine Cummins DEF Doser Injector","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"84\" data-end=\"422\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 5508583NX is a genuine Cummins DEF doser injector designed for compatible diesel exhaust fluid system applications including B6.7, L9, X12, and X15 engine platforms. It delivers controlled diesel exhaust fluid into the aftertreatment system to support SCR operation and maintain proper DEF injection during emissions system processes.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp data-start=\"451\" data-end=\"578\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 5508583NX DEF doser injector is manufactured to Cummins specifications for diesel exhaust fluid injection system operation.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-start=\"580\" data-end=\"1039\"\u003e\n\u003cli data-start=\"580\" data-end=\"654\"\u003eInjects DEF into the exhaust aftertreatment system during dosing events.\u003c\/li\u003e\n\u003cli data-start=\"655\" data-end=\"722\"\u003eRegulates diesel exhaust fluid delivery for SCR system operation.\u003c\/li\u003e\n\u003cli data-start=\"723\" data-end=\"804\"\u003eSupports DEF injection requirements across compatible Cummins engine platforms.\u003c\/li\u003e\n\u003cli data-start=\"805\" data-end=\"881\"\u003eConnects with factory emissions system components and mounting interfaces.\u003c\/li\u003e\n\u003cli data-start=\"882\" data-end=\"967\"\u003eMaintains controlled fluid distribution throughout aftertreatment operation cycles.\u003c\/li\u003e\n\u003cli data-start=\"968\" data-end=\"1039\"\u003eAssists proper emissions system function through accurate DEF dosing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eGeneral Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable style=\"height: 156.4px; width: 100% !important; table-layout: fixed !important; display: table !important;\" class=\"product-table\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 29.6663%;\"\u003e \u003ccol style=\"width: 70.1483%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5508583NX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCummins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB6.7 CM2350 B121B, B6.7 CM2450 B155B, L9 CM2450 L126B, X12 CM2450 X137B, X15 CM2450 X124B, X15 CM2450 X134B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiesel Exhaust Fluid System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0 Ibs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe 5508583NX should be installed after inspecting the DEF injector mounting surface, electrical connector, DEF supply connection, and exhaust dosing point for contamination, leaks, or physical damage that could affect injection accuracy. After installation, verify secure electrical connection, confirm proper DEF flow, and perform the required aftertreatment system checks using compatible diagnostic equipment.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eAlways verify the part number, engine model, DEF system configuration, and aftertreatment application before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":43507055493183,"sku":"5508583NX","price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/57_f7077f3d-9544-48e2-abca-d62e4419347c.jpg?v=1778643496"},{"product_id":"2888174-genuine-cummins-def-doser-injector","title":"2888174 Genuine Cummins DEF Doser Injector","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe 2888174 is a genuine Cummins DEF doser injector designed for compatible diesel exhaust fluid system applications. It meters and injects DEF into the exhaust aftertreatment system to support Selective Catalytic Reduction (SCR) operation and maintain proper emissions system control during engine operation.\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cp data-start=\"420\" data-end=\"539\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe 2888174 DEF doser injector is manufactured to Cummins specifications for controlled diesel exhaust fluid injection.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-start=\"541\" data-end=\"963\"\u003e\n\u003cli data-start=\"541\" data-end=\"611\"\u003eDelivers DEF into the exhaust system during dosing operation cycles.\u003c\/li\u003e\n\u003cli data-start=\"612\" data-end=\"678\"\u003eRegulates diesel exhaust fluid flow for SCR system requirements.\u003c\/li\u003e\n\u003cli data-start=\"679\" data-end=\"756\"\u003eSupports accurate fluid injection within compatible aftertreatment systems.\u003c\/li\u003e\n\u003cli data-start=\"757\" data-end=\"821\"\u003eIntegrates with factory DEF supply and electrical connections.\u003c\/li\u003e\n\u003cli data-start=\"822\" data-end=\"896\"\u003eMaintains controlled DEF distribution during emissions system operation.\u003c\/li\u003e\n\u003cli data-start=\"897\" data-end=\"963\"\u003eAssists proper SCR performance through precise dosing functions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; display: block;\"\u003e\n\u003ctable style=\"height: 156.4px; width: 100% !important; table-layout: fixed !important; display: table !important;\" class=\"product-table\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 29.6663%;\"\u003e \u003ccol style=\"width: 70.1483%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2888174\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCummins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.4px;\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDEF Doser Injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThe 2888174 should be installed after inspecting the DEF injector mounting surface, electrical connector, DEF supply connection, and exhaust dosing port for contamination, leaks, or damaged sealing areas. After installation, verify secure connector engagement, confirm proper DEF flow, and complete the required aftertreatment system checks using compatible diagnostic equipment.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eAlways verify the part number, engine application, DEF system configuration, and aftertreatment system requirements before installation.\u003c\/p\u003e\n\u003c\/blockquote\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":43507056181311,"sku":"2888174","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/3971\/7695\/files\/2871878_1_563x563_4e28b26f-3089-45ff-9f5b-4c81ec640f0c.jpg?v=1783319453"}],"url":"https:\/\/linetruckparts.com\/collections\/def-doser.oembed","provider":"Line Truck Parts","version":"1.0","type":"link"}