{"product_id":"4254212c91-genuine-oem-international-navistar-5-gal-def-tank-qls-head-11","title":"4254212C91 | Genuine OEM International\/Navistar 5-Gal DEF Tank QLS Head 11\"","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cstrong\u003e4254212C91 | Genuine OEM International\/Navistar 5-Gal DEF Tank QLS Head 11\"\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 4254212C91 DEF Tank QLS Head is an 11-inch sensor head listed for compatible 5-gallon Diesel Exhaust Fluid (DEF) tank applications. It is part of the DEF monitoring system used in vehicle emissions aftertreatment. Verify the original part number and tank configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 4254212C91\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: International \/ Navistar\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: Genuine OEM — confirm the item's actual condition with the seller\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eComponent: DEF Tank Quality Level Sensor Head\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTank Capacity: 5 Gallons\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHead Length: 11 Inches\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSystem: Diesel Exhaust Fluid (DEF) \/ SCR Aftertreatment System\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for compatible International\/Navistar vehicles equipped with a 5-gallon DEF tank using the specified 11-inch QLS sensor head. Exact vehicle and tank compatibility should be confirmed before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe DEF tank QLS head helps monitor DEF tank conditions for the vehicle’s emissions aftertreatment system. Proper sensor operation supports reliable system monitoring and helps the vehicle identify potential DEF-related issues.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSIGNS OF A FAULTY DEF TANK QLS HEAD\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncorrect or inconsistent DEF level readings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF quality warning on the dashboard\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF or aftertreatment system warning lights\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDiagnostic trouble codes related to DEF tank sensors\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReadings that do not correspond with the actual tank condition\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEmissions system warnings or related performance restrictions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWHY REPLACE THE DEF TANK QLS HEAD?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA faulty sensor head may cause inaccurate DEF monitoring and trigger system warnings or diagnostic codes. Replacing a defective component with the correct compatible part can help restore reliable tank monitoring.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConfirm that part number 4254212C91 matches your original component and DEF tank configuration. Sensor heads may differ in dimensions, connections, or vehicle applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original part number. We are happy to help verify compatibility before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGENUINE INTERNATIONAL \/ NAVISTAR PART\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 4254212C91\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49939833225475,"sku":"SY1082","price":360.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/DEF_Sensor_Head_Assembly.jpg?v=1792702416","url":"https:\/\/truckpartsplanet.com\/products\/4254212c91-genuine-oem-international-navistar-5-gal-def-tank-qls-head-11","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}