5509448 | Genuine Cummins® Doser Fluid Supply Module For EPA21 15L ISX/QSX
5509448 | Genuine Cummins® Doser Fluid Supply Module For EPA21 15L ISX/QSX is backordered and will ship as soon as it is back in stock.
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5509448 | Genuine Cummins® Doser Fluid Supply Module For EPA21 15L ...
Part Number: 5509448
Condition: Used In Good Condition
Manufacture/Brand: Cummins
Related Part Numbers: 5509448RX, A063W687, 5509448NX, 5509448C
Description:
A DEF (Diesel Exhaust Fluid) doser or supply module is a key component in modern diesel engine emission systems — specifically in the Selective Catalytic Reduction (SCR) system. Its main job is to deliver precise amounts of DEF into the exhaust stream to help reduce harmful nitrogen oxide (NOₓ) emissions. Doser Fluid Supply Module For EPA21 15L ISX/QSX For Kenworth T680, T880, Peterbilt 579, work condition, used take-off Kenworth T880 2024
Fits For Kenworth T680, T880, Peterbilt 579
Engines: B6.7 CM2350 B121B, B6.7 CM2450 B155B, L9 CM2450 L126B, X12 CM2350 X119B, X12 CM2450 X137B, X15 CM2450 X124B, X15 CM2450 X134B
Purpose:
|
Draws DEF (a urea-water solution) from the tank. |
Signs of a Bad Doser Fluid Supply Module
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DEF dosing too low or too high triggers check engine lights.
Engine may enter derate mode, limiting speed or power. |
About the Manufacturer – Cummins:
Cummins is a leading American manufacturer of diesel and natural gas engines, as well as power generation systems and emissions solutions. Founded in 1919 and headquartered in Columbus, Indiana, Cummins is known globally for its durable, high-performance engines used in trucks, buses, construction equipment, agriculture, and power systems.
The brand is widely respected for its innovation in clean diesel technology, including aftertreatment systems, turbochargers, and advanced electronics that help reduce emissions while maximizing engine efficiency and reliability.
