Vacuum Valve Mercedes W906 OM651.955 Turbo Pressure Actuator A6510906080

The Mercedes W906 OM651.955 turbo vacuum valve is an original equipment turbocharger and parts component designed to precisely control the turbine operation in Mercedes diesel engines. This OEM component ensures factory fit, proper operating characteristics, and stable boost parameters in the OM651.955 engine.

Specifications and technical data

• SKU: A6510906380-6
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510906380
• Substitutable numbers: A6510906380, A 651 090 63 80, A6510906080, A 651 090 60 80
• Category: Turbos & Parts

Purpose and function in the supercharging system

The turbine vacuum valve is responsible for controlling the turbocharger's geometry or bypass valve, which translates into proper boost pressure buildup throughout the entire RPM range. A properly functioning component:

• stabilizes the boost pressure under load,
• reduces the risk of engine overcharging or undercharging,
• supports an even, predictable response to the accelerator pedal,
• helps maintain proper combustion and emission parameters.

Thanks to the use of the original turbocharger and parts group, compliance with the factory control strategy of the OM651.955 engine is maintained, without the need for adaptation or modification of the installation.

Original origin and replacement numbers

This vacuum valve comes from the Mercedes line of parts, maintaining factory-standard workmanship, diaphragm performance, and actuator stroke. The component has a dedicated OEM part number and assigned interchangeable numbers, making it easy to verify compatibility with a specific engine and turbocharger configuration.

This allows the mechanic or user to easily compare the markings with the service documentation, ensuring that they are selecting the correct component for a given variant of the Mercedes W906 with the OM651.955 unit.

Technical condition and benefits of choosing a used part

The component is offered in used condition, which significantly reduces repair costs compared to a new OEM component, while maintaining the original design and fit. In practice, this means:

• factory mounting points and vacuum connections,
• compatibility with the original engine control,
• no need to modify installation or brackets.

For many users and workshops, choosing a proven used part is a reasonable compromise between cost and quality, especially in the case of engine accessories such as turbine vacuum valves.

Why it is worth choosing Mercedes turbochargers and parts

Using genuine turbocharger and parts components in Mercedes vehicles helps maintain the integrity of the entire turbocharging system. This contributes to:

• predictable engine behavior across the full load range,
• lower risk of controller errors related to boost pressure,
• easier diagnostics in the future thanks to compliance with service documentation.

If you are looking for other components from the same group, check the available turbochargers and parts for Mercedes to complete the entire system based on compatible components.

Practical tips and knowledge about drive systems

In Mercedes vehicles equipped with advanced four-wheel drive systems and modern diesel engines, the proper functioning of the turbocharger and its ancillaries is crucial for smooth driving and drive durability. It's worth expanding your knowledge of the interaction between the engine, supercharger, and AWD systems by using the following material: xDrive, 4Matic, quattro, and 4Motion – a comparison of AWD systems from BMW, Mercedes, Audi, and VW . This helpful technical background is essential when planning a service for premium cars.

If you want to better plan your car's maintenance and learn which consumables most often require replacement, also check out the TOP 10 guide to the most frequently replaced parts in your car , which will help you optimize service costs without sacrificing quality.