2523589C91 | Genuine International® / Navistar® DEF Header, 7 Gallon Tank, QLS 1% SSI

SKU: 2523589C91 MPN: 2523589C91

Experience cutting-edge DEF control with the New Genuine International / Navistar DEF Header. Part number: 2523589C91. Digital canbus sensor, 6-bolt mounting, full suction and return fittings, and 7-gallon tank compatibility.

$469.00
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: 2523589C91

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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 2523589C91 Part Number 2523589C91
Specifications
Sensor Type QLS 1% SSI Sensor Type QLS 1% SSI
Tank Capacity 7 Gallon Tank Capacity 7 Gallon
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Header Height (IN) 18 DEF Header Height (IN) 18
DEF Suction Fitting Dia. (IN) 3/8 SAE J2044 DEF Suction Fitting Dia. (IN) 3/8 SAE J2044
DEF Return Fitting Dia. (IN) 5/16 SAE J2044 DEF Return Fitting Dia. (IN) 5/16 SAE J2044
Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead
Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Outlet 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:

The Genuine DEF Header from International / Navistar, Part number: 2523589C91, comes new to handle accurate DEF monitoring for 7-gallon tanks. Its Deutsch DT4 connector and digital canbus sensor manage suction, return, and coolant lines efficiently, while a 40µ filter protects the system. The 6-bolt interface guarantees secure installation and reliable operation.

Why Replacement is Important:

Faulty headers can cause erratic readings, trigger derates, or affect urea delivery, interrupting normal engine operation.

Impact on Vehicle Performance:

By maintaining proper DEF flow and sensor precision, the vehicle’s SCR system functions optimally, preserving power and reducing emissions faults.

Manufacturer Information:

International® produces parts designed to withstand demanding conditions, ensuring consistent operation and fleet efficiency.

Navistar® provides durable parts engineered to maintain performance and uptime in rigorous trucking environments.

Tags & Category: Diesel Exhaust Fluid Sensor, DEF QLS Sensor, International, Navistar, QLS 1% SSI, DEF Tank Sensor, 7 Gallon DEF Tank, DEF Quality Level Sensor, SCR System Sensor, Emissions Control Component, Heavy Duty Truck DEF Sensor

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: 2523589C91