{"product_id":"4254201c91-genuine-oem-international-9-5-gallon-def-qls-sensor-head","title":"4254201C91 | Genuine OEM International 9.5 Gallon DEF QLS Sensor Head","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e4254201C91 | Genuine International® \/ Navistar® 9.5 Gallon DEF Tank QLS Sensor Head\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 4254201C91 QLS Sensor Head is designed for compatible International® \/ Navistar® Diesel Exhaust Fluid (DEF) tank systems. Intended for a 9.5-gallon DEF tank application, this component is associated with DEF quality-level sensing within the vehicle's emissions control system. Verify the original part number and tank configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003ePRODUCT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePart Number: 4254201C91\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: International® \/ Navistar®\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCondition: Genuine OEM\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eComponent: DEF Tank QLS Sensor Head\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSystem: Diesel Exhaust Fluid (DEF) \/ Selective Catalytic Reduction (SCR)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTank Capacity: 9.5 gallons\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSensor Type: QLS (Quality Level Sensor)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAPPLICATIONS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned for compatible International® \/ Navistar® DEF tank configurations with a 9.5-gallon capacity. Exact fitment depends on vehicle model, model year, tank configuration, electrical connector, and original equipment part number.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eConfirm compatibility using the vehicle VIN and the part number on the existing sensor head before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFUNCTION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe QLS sensor head works with the DEF tank monitoring system to provide information related to DEF quality and tank conditions, depending on the system configuration. Its readings help the vehicle's emissions control system monitor DEF and support proper SCR system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eCOMMON SIGNS OF FAILURE\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eDEF quality sensor fault codes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncorrect or inconsistent DEF system readings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck Engine Light or emissions system warnings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSCR system warning messages\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDEF sensor communication problems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEmissions-related warnings or engine derate conditions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWHY REPLACE THE QLS SENSOR HEAD?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA faulty QLS sensor head can cause inaccurate DEF monitoring, diagnostic trouble codes, and emissions system warnings. Replacing a confirmed defective component with the correct compatible part can help restore reliable DEF system monitoring.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFITMENT INFORMATION\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore ordering, verify part number 4254201C91, the 9.5-gallon tank application, connector configuration, and vehicle compatibility against the original component or an OEM parts catalog. Do not assume that this sensor head fits every International® \/ Navistar® DEF tank.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGENUINE INTERNATIONAL PART\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 4254201C91\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49887958171907,"sku":"SY1180","price":445.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/2515984C3_QLS_Sensor.jpg?v=1790440141","url":"https:\/\/truckpartsplanet.com\/products\/4254201c91-genuine-oem-international-9-5-gallon-def-qls-sensor-head","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}