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Cummins  |  SKU: 4395016

4395016 | Genuine Cummins® DEF Doser Pump

$1,24900
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Description:
A DEF Doser Pump (also called a DEF pump or urea dosing pump) 4395016 is a component of a diesel engine’s Selective Catalytic Reduction (SCR) emissions system. Its job is to deliver Diesel Exhaust Fluid (DEF) from the DEF tank to the exhaust system in the correct amount.

Part Number: 4395016, 4395016RX
Condition: New
Manufacture/Brand: Cummins

Engine

 QSG12 CM2350 G110, X12 CM2350 G110, X12 CM2350 X119B, X15 CM2350 X116B


Fits For 4395016

 International, Cummins Engines


Purpose of using 4395016

  1. Supply DEF to the exhaust system

    • Pumps DEF from the DEF tank to the DEF injector (doser).

  2. Reduce NOx emissions

    • DEF helps convert nitrogen oxides (NOx) into harmless nitrogen and water vapor.

  3. Support the SCR system

    • Ensures the Selective Catalytic Reduction system works properly.

  4. Prevent engine derate or shutdown

    • Proper DEF dosing avoids emissions faults that limit engine power.

  5. Improve environmental compliance

    • Helps diesel engines meet emissions standards.


Signs of a Bad DEF Doser Pump 4395016

  • Check Engine Light or DEF warning light

    • Emissions or SCR system fault codes appear

  • Engine derate or reduced power

    • Vehicle limits speed or power to protect emissions compliance

  • DEF system fault messages

    • Messages like “DEF System Malfunction” or “Poor DEF Quality”

  • No DEF consumption

    • DEF level doesn’t decrease over time

  • Excessive DEF consumption

    • Pump may be over-dosing DEF

  • Crystallized DEF around injector or lines

    • White powder buildup indicates improper dosing

  • Hard starting or no start (on some systems)

    • Emissions fault prevents normal operation

  • Failed DEF system priming

    • Pump cannot build or hold pressure

 

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.

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