{"product_id":"4097727c91-genuine-oem-international-navistar-def-qls-header-assembly","title":"4097727C91 | Genuine OEM International DEF QLS 15.5G\/23G Header","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGenuine International \/ Navistar 4097727C91 Diesel Exhaust Fluid (DEF) QLS Header\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eGenuine International \/ Navistar Diesel Exhaust Fluid (DEF) QLS Header is a genuine DEF system component designed for compatible International \/ Navistar heavy-duty diesel trucks. It is installed in DEF tanks and helps monitor DEF level and quality while supporting proper operation of the vehicle’s emissions control system.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePRODUCT INFORMATION\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003ePart Number: 4097727C91 \u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eBrand: International \/ Navistar\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eCondition: New\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eComponent: Diesel Exhaust Fluid (DEF) QLS Header\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eSystem: DEF \/ SCR System\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eTank Capacity: 15.5–23 Gallons\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eFuel Type: Diesel\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eThis 4097727C91 DEF QLS Header is designed for selected International \/ Navistar diesel truck applications equipped with compatible 15.5G\/16G\/23G Gallon DEF tanks.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eCompatible applications may vary depending on the vehicle model, engine configuration, DEF tank configuration, and emissions system.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eThe DEF QLS Header is a key component of the vehicle’s Diesel Exhaust Fluid system. It is installed in the DEF tank and helps monitor DEF level and fluid quality, providing important information to the vehicle’s electronic control system.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eA worn, damaged, or malfunctioning DEF header may cause symptoms such as:\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e• DEF level reading problems\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Incorrect or inaccurate DEF level information\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• DEF quality or system warnings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Check engine or emissions system warnings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• SCR system performance issues\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• DEF system fault codes\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Reduced vehicle performance or derate conditions \u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWHY REPLACE A DEF QLS HEADER?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eA properly functioning DEF QLS Header helps the vehicle accurately monitor DEF level and quality and supports reliable operation of the SCR emissions system.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eReplacing a damaged or defective DEF header can help restore proper DEF system monitoring and help maintain normal vehicle operation.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003ePlease verify the original part number, DEF tank capacity, vehicle application, and system configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eThis part is designed for trucks with \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e15.5, 16G, 23 gallon DEF tanks\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e, but vehicle fitment can vary depending on model year, engine configuration, tank design, and emissions system specifications.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eIf you are unsure whether this part is correct for your vehicle, please contact us with your \u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eVIN and original part number\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e. We are happy to help verify compatibility before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGENUINE INTERNATIONAL \/ NAVISTAR PART\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49644994593027,"sku":"SY1061","price":475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/International_QLS_DEF_Sensor.jpg?v=1791214393","url":"https:\/\/truckpartsplanet.com\/products\/4097727c91-genuine-oem-international-navistar-def-qls-header-assembly","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}