{"product_id":"591-3427-5913427-genuine-cat-diesel-exhaust-fluid-def-header-11","title":"591-3427 | Genuine CAT® Diesel Exhaust Fluid (DEF) Header 11\"","description":"\u003cp\u003e\u003cstrong\u003eDescription and Purpose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePart number \u003cstrong\u003e591-3427\u003c\/strong\u003e designates this \u003cstrong\u003eGenuine New CAT Diesel Exhaust Fluid\u003c\/strong\u003e (\u003cstrong\u003eDEF\u003c\/strong\u003e) \u003cstrong\u003eHeader\u003c\/strong\u003e, an 11-inch digital assembly built to manage your emissions fluid. It features a CANbus sensor for precise level monitoring and coolant lines to thaw frozen DEF. Additionally, the unit includes a 40-micron filter to ensure only clean fluid reaches the dosing system. Сross reference: 5913427\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Replacement is Important:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA bad header often leads to \"derate\" codes or frozen tanks in winter. Replacement is the immediate fix for digital communication errors or clogged suction lines that starve the pump.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImpact on Vehicle Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInstalling this unit guarantees accurate data flow to the ECM. It prevents sudden power loss events and ensures the aftertreatment system functions correctly without triggering dashboard warnings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCaterpillar®\u003c\/strong\u003e applies rigorous engineering and quality standards to deliver parts that ensure reliable performance, precise integration, and long-term durability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTags \u0026amp; Category:\u003c\/strong\u003e Diesel Exhaust Fluid Header, DEF Header Assembly, DEF Tank Header, DEF Supply Module, DEF Pump Header, SCR DEF System Component, Aftertreatment DEF Module, Caterpillar DEF Header, Diesel Emissions System, DEF Tank Interface, (DEF) SCR System\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eParts Finder Q offers a \u003cstrong\u003e365-days warranty\u003c\/strong\u003e for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.\u003c\/p\u003e","brand":"CAT®","offers":[{"title":"Default Title","offer_id":51121405198634,"sku":"591-3427","price":1179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/6566\/3530\/files\/591-3427_Genuine_CAT_Diesel_Exhaust_Fluid_DEF_Header_11_Back-left_angle.jpg?v=1770286682","url":"https:\/\/partsfinderq.com\/products\/591-3427-5913427-genuine-cat-diesel-exhaust-fluid-def-header-11","provider":"Parts Finder Q","version":"1.0","type":"link"}