04-31354-001 | Genuine Freightliner® Diesel Exhaust Fluid (DEF) Header 18"

SKU: 04-31354-001 MPN: 04-31354-001

Strengthen DEF system accuracy with a Genuine New Freightliner Header engineered for clean fluid delivery. Part number: 04-31354-001 integrates a digital sensor, secure 6-bolt fit, coolant connections and a 40µ filter that protects dosing.

$1,149.00
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: 04-31354-001

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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 Freightliner® Brand Freightliner®
Part Number 04-31354-001 Part Number 04-31354-001
Cross Reference 0431354001 Cross Reference 0431354001
Specifications
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Header Height (IN) 18 (17.5) DEF Header Height (IN) 18 (17.5)
DEF Suction Fitting Dia. (IN) 5/16 SAE J2044 DEF Suction Fitting Dia. (IN) 5/16 SAE J2044
DEF Return Fitting Dia. (IN) 3/8 SAE J2044 DEF Return Fitting Dia. (IN) 3/8 SAE J2044
Coolant Inlet Fitting Dia. (IN) VDA NW08 Nipple Coolant Inlet Fitting Dia. (IN) VDA NW08 Nipple
Coolant Outlet Fitting Dia. (IN) VDA NW08 Nipple Coolant Outlet Fitting Dia. (IN) VDA NW08 Nipple
In-Tank Filter 40µ In-Tank Filter 40µ
Tank Interface 6 Bolt Tank Interface 6 Bolt
Operating Voltage Range 9 to 32V Operating Voltage Range 9 to 32V

Useful Information

Description and Purpose:

Designed by Freightliner, this Genuine New DEF Header with Part number: 04-31354-001, combines sensor data, DEF circulation, suction, return flow and filtration in a single assembly. The unit features a digital CAN-bus level sensor, an in-tank 40µ filter, and integrates suction and return ports using standardized SAE J2044 5/16 and 3/8 fittings, along with VDA NW08 coolant connectors. Cross reference: 0431354001

Why Replacement is Important

When the header sensor begins sending inaccurate Def level data or fails to maintain proper heating, the SCR system restricts engine torque and triggers emissions faults.

Impact on Vehicle Performance

A properly functioning DEF header ensures reliable SCR operation, consistent DEF temperature regulation and stable fluid delivery, preventing reduced power mode and maintaining emissions compliance.

Manufacturer Information: 

Freightliner® delivers dependable commercial-grade components engineered for heavy-duty performance, offering fleet-focused durability and reliable operation in demanding on-road conditions.

Tags & Category: Diesel Exhaust Fluid Header, DEF Tank Header, Freightliner DEF Header, DEF Header with Sensor, DEF Level Sensor, DEF Suction and Return Fittings, DEF Coolant Line Connector, Digital Canbus DEF Sensor, DEF Header Assembly, DEF Tank Module, DEF Header Freightliner 6 Bolt, DEF System Components, Emissions Control Parts, SCR System DEF Header, Genuine Freightliner DEF Header, DEF Header Replacement, Heavy Duty Truck DEF Header

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: 04-31354-001