2523591C91 | Genuine International® / Navistar® Diesel Exhaust Fluid (DEF) Header 25" for 10.6—32G

SKU: 2523591C91 MPN: 2523591C91

Elevate your fleet’s DEF efficiency with the Genuine International / Navistar DEF Header. Part number: 2523591C91. Condition: new. 25-inch heated sensor, full suction and return fittings, and compatible with tanks from 10.6 to 32 gallons.

$479.00
No Core Charge
3 in stock

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Contact us to check if overnight next-day delivery is available for your order - PN: 2523591C91

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Product Description

Product Name Diesel Exhaust Fluid (DEF) Header Product Name Diesel Exhaust Fluid (DEF) Header
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 2523591C91 Part Number 2523591C91
Specifications
Tank capacity 10.6, 10.8, 15.9, 19, 25.2, 32 Gallons Tank capacity 10.6, 10.8, 15.9, 19, 25.2, 32 Gallons
DEF Header Height (IN) 25 DEF Header Height (IN) 25
DEF Return Fitting Dia. (IN) 5/16 SAE J2044 DEF Return Fitting Dia. (IN) 5/16 SAE J2044
Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Suction Fitting Dia. (IN) 3/8 SAE J2044 DEF Suction Fitting Dia. (IN) 3/8 SAE J2044
Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead
In-Tank Filter 40µ In-Tank Filter 40µ
Tank Interface 6 Bolt Tank Interface 6 Bolt

Useful Information

Description and Purpose:

Marked with Part number: 2523591C91 and offered new, this Genuine International / Navistar DEF Header integrates sensor technology and coolant-heated lines to optimize DEF tank operations. Designed for tanks between 10.6 and 32 gallons, it features a digital canbus sensor, Deutsch DT4 connector, and a secure 6-bolt mount for stable performance.

Why Replacement is Important:

A worn or faulty DEF header can compromise urea flow, triggering system alerts and reducing emissions efficiency.

Impact on Vehicle Performance:

With a functioning header, DEF injection is smooth and precise, ensuring the SCR system operates at peak reliability for engine performance and emissions control.

Manufacturer Information:

International® improves fleet uptime with parts that maintain consistent output even in extreme temperature and road environments.

Navistar® delivers advanced manufacturing solutions designed to minimize service intervals and improve total fleet lifecycle efficiency.

Tags & Category: DEF Header, DEF Tank Head, Diesel Exhaust Fluid Header Module, DEF Sensor Head, DEF Quality Sensor, DEF Level Sensor, DEF Header 25 Inch, 3/8 SAE J2044 Suction, 5/16 SAE J2044 Return, 5/8 Hose Bead Coolant Ports, Coolant-Heated DEF Header, Deutsch DT4 Connector, Digital Canbus Sensor, 40 Micron DEF Filter, 6 Bolt Tank Interface, International DEF System, Navistar Emissions Component.

Warranty:

Parts Finder Q offers a 365-days warranty 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.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 2523591C91