Mercedes-Benz W207 W212 OM642 EGR Gas Recirculation Pipe Hose Tube A6421403308

Mercedes-Benz W207 W212 OM642 EGR Gas Recirculation Pipe Hose Tube is an item from the EGR Valves and Parts category, designed for the exhaust gas recirculation system in Mercedes diesel engines. It is responsible for the precise routing of exhaust gases in the front part of the engine bay, supporting stable engine operation and emission reduction.

Specifications and technical data

• SKU: A6421403308
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421403308
• Substitutable numbers: A6421403308, A 642 140 33 08, KZ
• Location on the vehicle: Front
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The EGR pipe in Mercedes W207 and W212 models with the OM642 unit operates in the front part of the vehicle, connecting components of the exhaust gas recirculation system to ensure tightness and proper flow. A correctly selected EGR pipe stabilizes engine performance, supports smooth operation, and helps maintain compliance with exhaust emission standards.

This component is crucial for:

• maintaining proper exhaust gas circulation in the EGR system,
• reducing deposit buildup in the intake manifold and EGR valve,
• preserving correct torque characteristics across typical load ranges.

Construction and fitment for Mercedes W207 / W212 OM642

The Mercedes-Benz W207 W212 OM642 EGR Gas Recirculation Pipe Hose Tube has been designed for specific structural solutions used in E-Class and E-Class Coupé Mercedes vehicles with the OM642 engine. Its placement in the front zone of the engine bay requires a specific shape, diameter, and routing to maintain clearances from other components and ensure safe operation at elevated temperatures.

Proper fitment to the exhaust and intake system translates into:

• stable mounting without stress,
• reduced risk of leaks at connections,
• correct interaction with the EGR valve and other system components.

Component condition and service application

The offered EGR pipe is a used part, which allows for cost-effective repair of the exhaust gas recirculation system while maintaining original assembly specifications. This type of component is particularly useful when servicing OM642 units, where leaks or damage to EGR lines can cause performance drops, engine control unit errors, or rough idling.

Replacing the EGR pipe is recommended, among other situations, when:

• there are signs of exhaust leaks around the connections,
• mechanical damage to the pipe is identified,
• full system tightness needs to be restored after cleaning the EGR system.

Integration with other EGR system components

The EGR pipe works in conjunction with the EGR valve, exhaust gas cooler, and intake hoses, forming a cohesive system responsible for recirculating a portion of exhaust gases into the intake manifold. A correctly selected element from this group reduces the risk of engine control unit interference and helps maintain stable combustion parameters, which is important for both engine durability and fuel consumption.

If you are planning a comprehensive repair or upgrade of your Mercedes engine area and need other items from the same group, such as lines, pipes, or modules related to exhaust gas recirculation, check out the available parts in the Mercedes EGR Valves and Parts category.

Support with selection and tuning with used parts

When selecting an EGR pipe for a specific Mercedes W207 or W212 configuration, it is worth paying attention to compatibility with the engine unit and its placement in the front part of the vehicle. In the case of modifications or tuning of the OM642 engine, properly selected EGR system components allow for maintaining a balance between performance and component durability.

If you are considering improving your car's performance using aftermarket components and want to do so in a cost-effective way, the article Tuning with used parts – how to gain performance without spending a fortune will be helpful, as it discusses a practical approach to modifications using proven, used components.