Mercedes W204 W207 W212 EGR Valve Exhaust Cooler Pipe OM642 A6421402308

Mercedes W204 W207 W212 EGR Valve Exhaust Cooler Pipe OM642 is a component from the EGR Valves and Parts category, designed for the exhaust gas recirculation system in diesel engines. It is responsible for the stable discharge of cooled exhaust gases from the EGR cooler, which supports the proper operation of the diesel power unit and reduces exhaust emissions. This is a practical solution for users who want to restore the correct function of the EGR system in their Mercedes without investing in a new component.

Specifications and technical data

• SKU: A6421402308
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421402308
• Substitutable numbers: A6421402308, A 642 140 23 08
• Fuel type: Diesel
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The EGR valve exhaust cooler pipe in the OM642 engine is responsible for transporting exhaust gases between the cooler and the rest of the recirculation system. A properly selected component ensures:

• stable exhaust gas flow within the diesel engine's operating range,
• cooperation with the EGR cooler and EGR valve,
• maintenance of the appropriate temperature of exhaust gases directed back to the intake manifold.

As a result, the exhaust gas recirculation system can operate in a predictable manner, which translates into smooth engine operation and compliance with the emission standards intended for a given generation of Mercedes.

Compatibility with Mercedes models

The presented pipe is dedicated to selected mid-size and full-size Mercedes models equipped with the OM642 engine and an EGR system with an exhaust cooler. This solution is found in popular body styles, such as sedan, estate, or coupe, making the part attractive to a wide group of users. Using an original component from the EGR Valves and Parts category allows for maintaining the factory geometry of the exhaust and intake system, thereby reducing the risk of leaks or improper installation.

Technical characteristics and advantages of use

The EGR valve exhaust cooler pipe for a diesel engine has been designed to operate at high temperatures and in an environment of exhaust gases with variable pressure. The design of the pipe allows for:

• resistance to thermal loads typical for diesel units,
• cooperation with factory mounts and seals,
• maintaining the tightness of the EGR system upon proper installation.

Using an original pipe instead of a worn or damaged component helps eliminate typical symptoms of EGR problems, such as exhaust leaks, the smell of exhaust in the engine compartment, or controller errors related to improper flow.

Product condition and installation aspects

The offered EGR valve exhaust cooler pipe is a used item, which represents a favorable compromise between cost and functionality. Before installation, it is recommended to verify the condition of the sealing surfaces and mounting points, as well as to use new gaskets compatible with the vehicle's EGR system. A properly installed pipe allows for restoring the correct exhaust gas circulation in the OM642 engine and reducing the risk of recurring leaks.

Technical support and development of the EGR system in Mercedes

For users interested in a broader context of the development of technical solutions at Mercedes, including changes in fuel supply and exhaust purification systems, an article describing successive generations of flagship models may be helpful. It is worth reading the material Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years to better understand the direction of development of technologies also used in newer diesel units.

If you are planning a comprehensive repair or upgrade of the exhaust gas recirculation area in your Mercedes and need other components from the same group, such as hoses, exhaust coolers, or control valves, check the available parts in the Mercedes EGR Valves and Parts category.