EGR Valve Mercedes W906 W205 Diesel OM651 EGR By Pass A6511400660

EGR Valve Mercedes W906 W205 Diesel OM651 EGR By Pass is an original exhaust system component designed for OM651 diesel engines used in Mercedes W906 series models. This component from the EGR Valves and Parts group is responsible for controlled exhaust gas recirculation, supporting the proper operation of the power unit and stable emission parameters. Thanks to its factory design, it ensures a proper fit to the vehicle's intake and exhaust system.

Specifications and technical data

• SKU: A6511400660
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511400660
• Substitutable numbers: A6511400660, A 651 140 06 60, A2C87494500
• Fuel type: Diesel
• Category: EGR Parts & Valves

Function and role of the EGR valve in the OM651 diesel engine

The EGR valve in a diesel engine is responsible for precisely directing a portion of the exhaust gases back into the intake manifold. In OM651 diesel units, this is crucial for:

• maintaining the appropriate combustion temperature in the cylinders,
• reducing nitrogen oxide (NOx) emissions,
• stable engine operation across a wide range of loads,
• proper cooperation with the engine control system and exhaust sensors.

A functional EGR valve helps reduce issues such as jerking during acceleration, unstable idle speed, or power loss, which often result from clogging or improper operation of exhaust gas recirculation components.

Construction and fitment for Mercedes W906

The EGR Valve Mercedes W906 W205 Diesel OM651 EGR By Pass has been designed as a component factory-compatible with the engine architecture and equipment in vehicles of this series. This means:

• maintaining the original geometry of connections to the manifold and exhaust pipes,
• compatibility with the factory electronic control of the power unit,
• correct positioning relative to other intake system components.

As a result, installation proceeds in an orderly manner, without the need for structural modifications, and the recirculation system maintains the parameters specified by the vehicle manufacturer.

Benefits of using an original EGR valve

Using an original valve from the EGR Valves and Parts group in a diesel engine provides measurable operational benefits:

• maintaining factory engine performance characteristics under various loads,
• better cooperation with the engine control unit software,
• reducing the risk of diagnostic errors related to improper exhaust gas recirculation,
• maintaining predictable fuel consumption under typical operating conditions.

This solution is particularly important in commercial vehicles, where the stability of the power unit and service predictability have a direct impact on the vehicle's availability for work.

Characteristics of the used product

The offered item comes from the used parts segment, which allows for an economical repair of the exhaust gas recirculation system while maintaining the manufacturer's original specifications. Choosing such a solution is often practiced in professional workshops servicing fleet delivery vehicles, where both technical compliance and maintenance cost optimization are important.

EGR system expansion and additional materials

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional valves, recirculation pipes, or mounting elements, check the available parts in the Mercedes EGR Valves and Parts category.

When selecting used exhaust system components and engine accessories, it is worth relying on proven solutions. To better plan your service strategy and learn about the most frequently chosen elements from the secondary market, check out our guide: The best used car parts – a guide to the most frequently chosen original parts.