4254212C91 | Genuine International® / Navistar® Diesel Exhaust Fluid (DEF) Tank QLS Head 11" 5 Gall

SKU: 4254212C91 MPN: 4254212C91

When DEF flow can’t fluctuate, the Genuine International / Navistar QLS Header delivers clean monitoring without interruptions. Condition: new. Part number: 4254212C91. Designed for 6-bolt DEF tanks with protected filtration.

$379.00
No Core Charge
3 in stock

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Product Description

Product Name Diesel Exhaust Fluid (DEF) Tank Head Product Name Diesel Exhaust Fluid (DEF) Tank Head
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 4254212C91 Part Number 4254212C91
Specifications
Sensor Type QLS Sensor Type QLS
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Header Height (IN) 11 DEF Header Height (IN) 11
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:

Presented new and Genuine from International / Navistar, this DEF Tank QLS Head with Part number: 4254212C91 serves as an integrated heating, filtering, suction, and sensor assembly for 5-gallon SCR tanks. It includes a Deutsch DT4 electrical connection, digital Canbus monitoring, and an internal 40µ filter to protect the system from crystallized DEF particles.

Why Replacement is Important:

Degraded QLS heads may stop delivering accurate fluid quality data or allow impurities to enter the system, leading to injector clogging and sensor-related emission faults. Replacement ensures full measurement stability and filtration protection.

Impact on Vehicle Performance:

Accurate DEF quality detection supports proper dosing and emission reduction, allowing the vehicle to retain torque output, avoid fault codes, and maintain compliance under varied temperature conditions.

Manufacturer Information: 

International® manufactures components with a focus on productivity, strength, and long-lasting service life.

Navistar® delivers components built to withstand demanding usage across long-haul, vocational, and industrial fleets.

Tags & Category: DEF Tank Head, DEF QLS Head, Diesel Exhaust Fluid Tank Module, DEF Sensor Head, DEF Level Sensor, DEF Quality Sensor, DEF Suction Module, Coolant-Heated DEF Header, International DEF System, Navistar Emissions Component, Deutsch DT4 Connector, Digital CANBUS Sensor, 5 Gallon DEF Tank, 11 Inch DEF Header, 3/8 SAE J2044 Suction, 5/16 SAE J2044 Return, 5/8 Hose Bead Coolant Ports, 40 Micron DEF Filter, 6 Bolt Tank Interface

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: 4254212C91