{"title":"DEF Sensors","description":"\u003cp\u003eEvery def sensors listing at Second Truck Parts is identified by brand and manufacturer part number, with its condition — new, remanufactured, or used — stated right on the listing. Part of our emissions \u0026amp; aftertreatment range. Most parts carry our 90-day warranty, returns are accepted for 30 days with an RA number, and our team verifies fitment free before you buy: send your VIN or engine serial and we confirm it fits.\u003c\/p\u003e\u003cp\u003eDon't see the exact part? Call \u003cstrong\u003e(877) 898-0737\u003c\/strong\u003e (Mon–Fri 8 AM–8 PM ET) or \u003ca href=\"\/pages\/request-a-quote\"\u003erequest a quote\u003c\/a\u003e — much of our inventory comes off salvage trucks in our own yard and may not be listed yet.\u003c\/p\u003e","products":[{"product_id":"sg400-e0071-genuine-hino-def-head-sensor-assembly","title":"Genuine Hino DEF Head Sensor Assembly","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Head Sensor Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eHino\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eSG400-E0071\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eSG400-E0071; SG400E0071, SG400-E0060, SG400-E0070, SG400E0060, SG400E0070\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eHino components are commonly used in commercial truck and equipment applications where dependable performance and proper fit are important.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Hino","offers":[{"title":"Default Title","offer_id":43195357790255,"sku":"SG400-E0071","price":499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_5171-Photoroom.jpg?v=1737600676"},{"product_id":"q21-6127-007-genuine-paccar-def-quality-sensor","title":"Genuine Paccar Def Quality Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDef Quality Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6127-007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6127-007; Q21-6127-007, Q216127007, Q216170004k1t, Q21 6170 004k1t, Q21-6170-004, Q216170004, Q216167004k1t, Q21 6167 004k1t, Q21-6167-004, Q216127007k1t, Q21 6127 007k1t\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":43237215338543,"sku":"Q21-6127-007","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_6508-Photoroom.jpg?v=1737602766"},{"product_id":"35054002-genuine-kenworth-def-sensor","title":"Genuine Kenworth DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eKenworth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e35054002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e35054002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eKenworth components support high-quality, driver-centric trucks designed for durability, comfort, and strong resale value.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Kenworth","offers":[{"title":"Default Title","offer_id":43239020920879,"sku":"35054002","price":245.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_6524-Photoroom.jpg?v=1737602806"},{"product_id":"350603-genuine-paccar-def-sensor","title":"Genuine Paccar DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor For MX13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e350603\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e350603; 350603, 350603WMA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":43239072268335,"sku":"350603","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_6534-Photoroom.jpg?v=1737602816"},{"product_id":"q21-6127-001-genuine-paccar-def-concentration-sensor","title":"Genuine Paccar DEF Concentration Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Concentration Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6127-001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6127-001; Q216127001, Q21-6170-001, Q216170001, Q21-6170-001K1T, Q216170001K1T, Q21 6170 001K1T, Q216167001, Q216167001K1T, Q21 6167 001K1T, Q21-6167-001, Q216127001K1T, Q21 6127 001K1T, Q21-6167-001K1T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":43650107899951,"sku":"Q21-6127-001","price":199.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_5456-Photoroom_bee3e22e-3d91-40da-8a39-6e3d2b1f39b7.jpg?v=1754617283"},{"product_id":"4097723c91-genuine-international-9-5-gallon-def-sensor","title":"Genuine International Def Sensor 9.5 Gallon","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDef Sensor 9.5 Gallon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eInternational\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e4097723C91\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e4097723C91; 4254213C91, 4086802C91\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eInternational\/Navistar parts are used across a wide range of medium- and heavy-duty trucks in North American fleets.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"International","offers":[{"title":"Default Title","offer_id":43675956871215,"sku":"4097723C91","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_6739-Photoroom_008572ae-68a0-4af3-ad8b-7f6226c40777.jpg?v=1754619744"},{"product_id":"350602-genuine-kenworth-def-sensor","title":"Genuine Kenworth DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eKenworth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e350602\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e350602\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eKenworth components support high-quality, driver-centric trucks designed for durability, comfort, and strong resale value.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Kenworth","offers":[{"title":"Default Title","offer_id":43840745635887,"sku":"350602","price":425.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_9977-Photoroom_3bdb9bf0-0a43-4ebe-a6d8-bc9d7712a795.jpg?v=1754658085"},{"product_id":"350247-genuine-peterbillt-def-sensor","title":"Genuine Peterbillt DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePeterbillt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e350247\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e350247; 350247WMA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePeterbilt parts are built for premium, driver-focused trucks that are popular with fleets and owner-operators across North America.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Peterbilt","offers":[{"title":"Default Title","offer_id":43882024206383,"sku":"350247","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_0448-Photoroom_f926d20e-022c-4c20-a3cf-38a3233649f7.jpg?v=1754658922"},{"product_id":"35054102-genuine-paccar-def-sensor","title":"Genuine Paccar DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e35054102\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e35054102\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":43882209837103,"sku":"35054102","price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_0493-Photoroom_ce59d31a-7a9d-4c47-b509-173c1d086c93.jpg?v=1754659002"},{"product_id":"q21-6092-genuine-paccar-def-sensor","title":"Genuine Paccar DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6092\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6092\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":44012904841263,"sku":"Q21-6092","price":269.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_1870-Photoroom_e11da66d-1b31-44d4-8d01-b4ac43bd67a8.jpg?v=1754661603"},{"product_id":"q21-6093-genuine-paccar-def-sensor","title":"Genuine Paccar DEF Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width:100%; border-collapse:collapse; border:1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eDEF Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003ePaccar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6093\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #000; padding:4px 6px;\"\u003eQ21-6093\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003ePACCAR components support both Kenworth and Peterbilt trucks with OEM-grade fit and performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Paccar","offers":[{"title":"Default Title","offer_id":44013322436655,"sku":"Q21-6093","price":269.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_1877-Photoroom_10c1b22e-7d20-44d4-88b1-4f61ff786d78.jpg?v=1754661616"},{"product_id":"021-6170-003-genuine-kenworth-def-concentration-sensor","title":"Genuine Kenworth DEF Concentration Sensor","description":"\u003cdiv class=\"std\"\u003e\n\u003ctable class=\"part-details\" style=\"width: 100%; border-collapse: collapse; border: 1px solid #000;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003eDEF Concentration Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003eCONDITION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003eUsed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003eBRAND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003eKenworth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003ePART NUMBER\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e021-6170-003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e\u003cstrong\u003ePART NUMBERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 4px 6px;\"\u003e021-6170-003; Q216170003, Q21-6170-003K1T, Q216170003K1T, Q21-6127-006K1T, Q216127006K1T, Q21-6167-003K1T, Q216167003K1T, Q21-6127-006, Q216127006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFunction of this part\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThe aftertreatment system treats exhaust gases after they leave the engine using components such as the DOC, DPF, and SCR catalyst. It controls soot and NOx emissions by trapping particulates and converting harmful gases into less harmful compounds.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eWhy this part matters\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eThese components are central to emissions compliance on modern diesel trucks. Problems in the aftertreatment system can cause frequent regens, power derates, and down-time until the fault is corrected.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eAbout the brand\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\u003cp\u003eKenworth components support high-quality, driver-centric trucks designed for durability, comfort, and strong resale value.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin: 10px 0; border: 1px solid #e5e5e5; border-radius: 4px; padding: 9px 11px;\"\u003e\u003csummary style=\"cursor: pointer; font-size: 16px; line-height: 1.25; font-weight: 600;\"\u003eFitment \u0026amp; usage\u003c\/summary\u003e\u003cdiv style=\"margin-top: 8px; font-size: 14px; line-height: 1.5;\"\u003e\n\u003cp\u003eUsed OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Kenworth","offers":[{"title":"Default Title","offer_id":44571467546671,"sku":"021-6170-003","price":140.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/7871\/3135\/files\/IMG_0104_1.jpg?v=1760106741"}],"url":"https:\/\/secondtruckparts.com\/collections\/def-sensors\/brand-peterbilt.oembed","provider":"Second Truck Parts","version":"1.0","type":"link"}