{"product_id":"5012173r91-genuine-oem-international-navistar-12-gal-def-quality-level-sensor-head","title":"5012173R91 | Genuine OEM International\/Navistar 12-Gal DEF Quality \u0026 Level Sensor Head","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cstrong\u003e5012173R91 | Genuine OEM International\/Navistar 12-Gal DEF Quality \u0026amp; Level Sensor Head\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 5012173R91 DEF Quality \u0026amp; Level Sensor Head Unit is a genuine OEM International\/Navistar component designed for compatible 12-gallon diesel exhaust fluid (DEF) tank systems. It monitors DEF level and fluid quality to support proper operation of the vehicle's emissions aftertreatment system. 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: 5012173R91\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 Quality \u0026amp; Level Sensor Head Unit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTank Capacity: 12 Gallons\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 the matching 12-gallon DEF tank and sensor configuration. Exact vehicle models, engine applications, and production years should be verified 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 quality and level sensor head monitors the amount and quality of diesel exhaust fluid in the tank. The information is used by the vehicle's emissions control system to help manage DEF usage and aftertreatment operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSIGNS OF A FAULTY DEF QUALITY \u0026amp; LEVEL SENSOR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncorrect DEF level displayed on the dashboard\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF quality warning despite properly filled tank\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF system or aftertreatment warning lights\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFault codes related to DEF level or quality\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUnexpected DEF level readings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEmissions system performance warnings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThese symptoms may also be caused by wiring, connectors, contaminated fluid, or other aftertreatment components. Proper diagnosis is recommended before replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHY REPLACE THE DEF SENSOR HEAD UNIT?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA faulty sensor can provide inaccurate DEF level or quality information and may trigger aftertreatment warnings. Replacing a confirmed defective sensor with the correct compatible unit can help restore accurate monitoring and normal DEF system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 5012173R91\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBrand: International \/ Navistar\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eComponent: DEF Quality \u0026amp; Level Sensor Head Unit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTank Capacity: 12 Gallons\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConfirm the part number, tank capacity, connector, and sensor configuration against the original unit before purchase. If 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: 5012173R91\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49939343147267,"sku":"5012173R91","price":617.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/DEF_Sensor_Detail.webp?v=1792699563","url":"https:\/\/truckpartsplanet.com\/es\/products\/5012173r91-genuine-oem-international-navistar-12-gal-def-quality-level-sensor-head","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}