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Cummins  |  SKU: 5405814

5405814 | Genuine Cummins® Exhaust Recirculation Cooler Assembly

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ConditionNew
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An Exhaust Recirculation Cooler (commonly called an EGR cooler) 5405814 is a component in an engine’s emissions control system that cools exhaust gases before they are sent back into the engine. Engine:

General Specifications

Condition New
Part Number 5405814, 5405814RX
Brand Cummins

 EPA17 15 liter ISX/QSX

Purpose & Function

  • Reduce NOx emissions

    • Cooling exhaust lowers combustion temperatures, which reduces nitrogen oxide (NOx) formation.

  • Control combustion temperature

    • Prevents excessively high temperatures inside the engine.

  • Help meet emissions regulations

    • Allows engines (especially diesel) to comply with environmental standards.

  • Protect engine components

    • Reduces heat stress on valves, pistons, and the intake system.

  • Improve engine efficiency and stability

    • Provides more controlled combustion under certain operating conditions.

Signs of a Bad Exhaust Recirculation Cooler

  • Coolant loss with no visible leak

    • Coolant may be leaking internally into the exhaust system

  • Engine overheating

    • EGR cooler can restrict coolant flow or leak coolant

  • White exhaust smoke or steam

    • Coolant entering the exhaust and burning off

  • Check Engine Light

    • Fault codes related to EGR flow, temperature, or coolant loss

  • Rough idle or poor engine performance

    • Caused by improper exhaust gas recirculation

  • Sweet smell from exhaust

    • Burning coolant has a sweet odor

  • Engine misfires or knocking

    • Incorrect combustion due to EGR malfunction

  • Contaminated intake system

    • Soot mixed with coolant can clog intake components

About 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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