{"product_id":"2523591c91-genuine-oem-international-def-header-25-10-6g-32g","title":"2523591C91 | Genuine OEM International DEF Header 25 10.6G\/32G","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e2523591C91 | Genuine OEM International\/Navistar Diesel Exhaust Fluid DEF Header 25\"\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 2523591C91 Genuine OEM International\/Navistar Diesel Exhaust Fluid (DEF) Header is a tank-mounted component designed for compatible diesel emissions systems. This 25-inch DEF header assembly supports monitoring of DEF tank conditions to help the vehicle's selective catalytic reduction (SCR) system operate according to its design.\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\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003ePart Number: 2523591C91\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBrand: International \/ Navistar\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCondition: Genuine OEM — confirm the item's actual condition with the seller\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eComponent: Diesel Exhaust Fluid (DEF) Header\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeader Length: 25 inches\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSystem: DEF \/ SCR Emissions System\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTank Applications: 10.6-gallon to 32-gallon DEF tanks, subject to fitment verification\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\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\u003eThis DEF Header is listed for compatible tank configurations ranging from 10.6 to 32 gallons. Exact compatibility depends on the vehicle model, model year, tank capacity and shape, header length, electrical connector, and original part number. Verify the application before ordering, as different DEF header assemblies may not be interchangeable.\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 DEF Header is installed in the DEF tank assembly and supports monitoring of fluid conditions through the sensors fitted to the specific configuration. Depending on the design, these may measure DEF level, quality, and temperature. The resulting signals help the vehicle's emissions control system manage diesel exhaust fluid operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eSIGNS OF A FAULTY DEF HEADER\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA faulty DEF Header or related system issue may cause:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eIncorrect or inconsistent DEF level readings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDEF quality or temperature sensor fault codes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck engine or emissions system warning lights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSCR system warnings or fault messages\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDEF system performance or communication issues\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEmissions-related derate warnings on applicable vehicles\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThese symptoms may also result from wiring faults, contaminated DEF, connector problems, or other emissions system components. Proper diagnostics are recommended before replacing the header.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWHY REPLACE THE DEF HEADER?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplacing a confirmed faulty DEF Header with the correct compatible unit can help restore accurate tank monitoring and normal DEF system operation. Depending on the vehicle, fault-code clearing, system checks, or additional diagnostic procedures may be required after installation.\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\u003eVerify that part number 2523591C91 matches the original DEF header before ordering. Compatibility depends on the vehicle model year, tank capacity and configuration, header length, connector type, and emissions system. Tank capacity alone is not sufficient to confirm fitment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIf you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original DEF header part number. We are happy to help verify compatibility before purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eGENUINE INTERNATIONAL \/ NAVISTAR PART\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: 2523591C91\u003c\/span\u003e\u003c\/p\u003e","brand":"INTERNATIONAL\/NAVISTAR","offers":[{"title":"Default Title","offer_id":49887920652547,"sku":"SY1062","price":475.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/9289\/6003\/files\/15_Gallon_QLS_DEF_Sensor.jpg?v=1791214370","url":"https:\/\/truckpartsplanet.com\/products\/2523591c91-genuine-oem-international-def-header-25-10-6g-32g","provider":"TRUCK PARTS PLANET","version":"1.0","type":"link"}