Mercedes W639 W906 OM651 Diesel Throttle Housing Air Pipe Hose A6510900470

Mercedes W639 W906 OM651 Diesel Throttle Housing Air Pipe Hose is an intake system component designed for diesel engines, responsible for precise control of the intake air volume. Thanks to its factory design for the Mercedes brand, it ensures proper cooperation with the engine control electronics and stable operating parameters of the power unit. This solution helps maintain the correct performance of the OM651 diesel engine and reduces the risk of improper fuel mixture combustion.

Specifications and technical data

• SKU: A6510900470
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510900470
• Substitutable numbers: A6510900470, A 651 090 04 70, A6510900370, A 651 090 03 70, A6510900070, A 651 090 00 70, A6510900170, A 651 090 01 70, 0280750553, 0 280 750 553
• Fuel type: Diesel
• Category: Throttle Bodies

Purpose and function in the intake system

The air throttle in a diesel engine plays a key role in managing airflow in the intake manifold, especially during startup, idling, and engine shutdown phases. In the case of OM651 units installed in vehicles such as the Mercedes W204 and W906, a properly functioning throttle stabilizes engine speed, supports the exhaust gas recirculation system, and helps reduce vibrations when turning off the engine. A correctly selected component from the Throttle Bodies category is essential for maintaining proper dynamics and predictable response to load.

Compatibility with the OM651 Diesel engine

The offered throttle has been designed to work with OM651 diesel units, where air control is strictly integrated with the engine control unit software. Using a component dedicated to a specific family of diesel engines allows for maintaining:

• proper communication with the control module,
• appropriate opening and closing characteristics of the flap,
• stable operating parameters in both cold and warm conditions.

As a result, the intake system maintains proper pressure and flow, which translates into predictable vehicle behavior during daily operation.

Advantages of using an original Mercedes throttle

Using an air throttle dedicated to a Mercedes with a diesel engine brings a number of practical operational benefits. The most important include:

• Factory fit for the intake system – proper positioning relative to the manifold and intake pipes, without the need for modifications.
• Consistency with factory software – maintaining the airflow control strategies intended by the manufacturer.
• Reduction of the risk of diagnostic errors related to improper throttle operation.
• Ability to use existing mounting points and electrical connectors.

For the user, this means more predictable engine operation, easier diagnostics, and a lower risk of problems resulting from improperly selected replacements.

Characteristics of the used component

The offered air throttle comes from the secondary market, which allows for an economical repair of the intake system while maintaining a component consistent with the factory design. This type of element is particularly attractive in situations where the existing throttle shows signs of wear, such as unstable idle, problems with engine shutdown, or sporadic errors related to airflow. Choosing a used OEM component allows you to maintain the structural integrity of the vehicle at reasonable service costs.

Application in service practice

Replacing the air throttle in an OM651 engine is a typical service procedure in the event of symptoms of improper intake system operation. Installing a component dedicated to Mercedes facilitates the mechanic's work, as the original mounting points and body geometry are preserved. In practice, this translates into shorter assembly time and a lower risk of leaks in the intake system. For workshops specializing in servicing Mercedes vehicles, this is a solution that allows for efficient and predictable repair.

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 throttle bodies, throttle control modules, or additional intake system components, check the available parts in the Mercedes Throttle Bodies category.

For those interested in a broader context of selecting original components and the impact of design on a vehicle's character, an article comparing classic and modern automotive solutions may be helpful – more information can be found in the material Classic Mini vs modern MINI – how the design has changed and which original Mini parts help preserve their character.