04-31677-000 | Genuine Freightliner® Diesel Exhaust Fluid (DEF) Header 20" for 13/23G

SKU: 04-31677-000 MPN: 04-31677-000

Maintain emission efficiency with the New Genuine Freightliner DEF Header. Part number: 04-31677-000. Designed for 13G and 23G DEF tanks, ensuring precise fluid level and temperature monitoring for consistent system performance.

$1,379.00
No Core Charge
3 in stock

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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 04-31677-000 Part Number 04-31677-000
Cross Reference 431677000 Cross Reference 431677000
Dimensions & Interfaces
DEF Header Height 20 in DEF Header Height 20 in
DEF Suction Fitting 1/4 in, SAE J2044 DEF Suction Fitting 1/4 in, SAE J2044
DEF Return Fitting 3/8 in, SAE J2044 DEF Return Fitting 3/8 in, SAE J2044
Coolant Inlet / Outlet Fittings NG12 port (inlet & outlet) Coolant Inlet / Outlet Fittings NG12 port (inlet & outlet)
Tank Interface SAE J2587 flange Tank Interface SAE J2587 flange
In-Tank Filter 70 µm In-Tank Filter 70 µm
Electrical Specifications
Minimum Operating Voltage: 5 V 5 V Minimum Operating Voltage: 5 V 5 V
Maximum Current 300 mA Maximum Current 300 mA
Maximum Power 125 mW Maximum Power 125 mW
Maximum Voltage Reading 48 V Maximum Voltage Reading 48 V
Temperature Range
Operating Temperature −40 to +85 °C Operating Temperature −40 to +85 °C
Protection & Grade
Ingress Protection Rating IP67 Ingress Protection Rating IP67

Useful Information

Description and Purpose:

This Diesel Exhaust Fluid (DEF) Header, identified as Part number: 04-31677-000, is a new condition genuine Freightliner component designed for 13G and 23G DEF tank configurations. It integrates level sensing, suction, return, and coolant circulation functions into a single durable module. Built with SAE J2044 and NG12 port fittings, it ensures leak-free operation and precise fluid monitoring under heavy-duty working conditions. Cross reference: 431677000

Why Replacement is Important:

A worn or malfunctioning DEF header can lead to inaccurate fluid readings, poor DEF circulation, and potential SCR system faults. Installing a new unit restores proper fluid management, safeguards emission compliance, and prevents unnecessary derating of the engine.

Impact on Vehicle Performance:

Supports accurate DEF level detection, maintains optimal fluid temperature, and ensures stable SCR performance for efficient exhaust aftertreatment operation.

Manufacturer Information: 

Freightliner® produces precision-engineered components built for endurance, ensuring reliable performance and long-lasting efficiency across heavy-duty truck applications.

Tags & Category: DEF Header, Diesel Exhaust Fluid Header, Freightliner DEF Tank Sensor, DEF Tank Header Assembly, DEF Level Sensor Module, DEF Tank Suction and Return Unit, 13G 23G DEF Header, SAE J2044 Fitting, NG12 Port Coolant Connection, SAE J2587 Tank Interface, 70 Micron In-Tank Filter, IP67 Rated DEF Sensor, Heavy Duty Truck Emissions System, DEF Temperature and Level Sensor, DEF Header Freightliner Cascadia

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: 04-31677-000