{"product_id":"5012171r91-genuine-oem-international-7-gal-def-sensor-qls-1-ssi","title":"5012171R91 | Genuine OEM International 7-Gal DEF Sensor QLS 1% SSI","description":"\u003cp data-pm-slice=\"1 1 []\"\u003e\u003cstrong\u003e5012171R91 | Genuine OEM International\/Navistar DEF Sensor for 7-Gallon Tank, QLS 1% SSI\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 5012171R91 DEF sensor is specified for compatible 7-gallon Diesel Exhaust Fluid (DEF) tank applications and features QLS 1% SSI technology. It is a component of the vehicle's DEF monitoring and 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: 5012171R91\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 Sensor\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTank Capacity: 7 Gallons\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSensor Specification: QLS 1% SSI\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 using a 7-gallon DEF tank with the specified QLS 1% SSI sensor. Exact vehicle compatibility should be verified using the original part number and tank configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFUNCTION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe DEF tank sensor provides monitoring information to the vehicle's DEF system. Proper sensor operation supports DEF monitoring and helps the vehicle's aftertreatment system identify potential sensor or fluid-related issues.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSIGNS OF A FAULTY DEF TANK SENSOR\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncorrect DEF level readings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDEF quality or level warnings 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 the DEF sensor\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInconsistent sensor readings\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 SENSOR?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA defective sensor can provide inaccurate information to the DEF monitoring system and trigger warning messages or diagnostic codes. Replacing a confirmed faulty sensor with the correct compatible part can help restore reliable system 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 5012171R91 matches your original sensor and 7-gallon DEF tank configuration. Sensor specifications and connections can vary between applications, so verify the QLS 1% SSI specification before purchase.\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: 5012171R91\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49940124991747,"sku":"SY1058","price":759.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/DEF_Tank_Sensor_Assembly.webp?v=1792699548","url":"https:\/\/truckpartsplanet.com\/products\/5012171r91-genuine-oem-international-7-gal-def-sensor-qls-1-ssi","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}