Mercedes W204 OM651 Pipe Duct Air Intake Hose W212 W906 Diesel A6510900028

Mercedes W204 OM651 Pipe Duct Air Intake Hose W212 W906 Diesel is an air supply system component for diesel engines, designed for Mercedes models equipped with the OM651 unit. It is responsible for the stable, controlled delivery of air to the intake system, which promotes smooth diesel engine operation and proper interaction with the throttle control system. Using this OEM component allows you to maintain the factory performance characteristics of the powertrain while keeping maintenance costs favorable.

Specifications and technical data

• SKU: A6510900028
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510900028
• Substitutable numbers: A6510900028, A 651 090 00 28, BG
• Fuel type: Diesel
• Category: Throttle Bodies

Function and role in the intake system

The intake hose in the OM651 diesel engine is responsible for precisely guiding the airflow from the filter system towards the flow control unit, which works in conjunction with components from the Throttle Bodies group. A properly selected and airtight intake duct reduces pressure drops, stabilizes flow, and supports the correct operation of the turbocharging and exhaust gas recirculation systems.

In practice, this translates into:

• more predictable response to diesel engine load,
• maintaining the correct air-fuel mixture parameters,
• reducing the risk of ECU errors related to incorrect airflow.

Compatibility with the OM651 unit

The presented Mercedes air intake hose has been designed to work with the OM651 engine, widely used in W204 and W906 diesel models. The use of the original duct geometry ensures proper fitment with factory mounts, clamps, and adjacent components in the engine bay.

As a result, during installation, you can maintain:

• the factory routing of the air duct,
• correct clearances from heating and moving elements,
• compatibility with the factory flow control system in the Throttle Bodies group.

Characteristics of the used OEM component

As a pre-owned part, the intake hose offers a favorable compromise between cost and maintaining the manufacturer's original specifications. A used OEM component typically features better fitment than universal replacements, which is particularly important in the tightly packed engine bay of a diesel vehicle. Maintaining the factory rigidity and shape of the duct reduces the risk of unwanted vibrations and leaks in the intake system.

Choosing an original intake hose is particularly important in vehicles where consistent performance parameters, stable boost pressure, and proper interaction with flow sensors and control elements from the Throttle Bodies category are essential.

Application in service and upgrades

By installing this intake hose in a Mercedes with an OM651 diesel engine, you can restore the correct air channel routing in situations where the existing duct has become worn, deformed, or mechanically damaged. This is especially important in vehicles used intensively, where the intake system is exposed to temperature changes, vibrations, and loads resulting from turbocharger operation.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as throttle bodies, connection ports, or additional flow control hoses, check out the available parts in the Mercedes Throttle Bodies category.

Additional technical support

When performing service work on the intake system and diesel powertrain, it is also worth paying attention to the associated thermal comfort systems. For users who want to better plan the maintenance of components related to air conditioning and heating, the following service guide may be helpful: Air conditioning and heating – part selection and maintenance for year-round comfort. It allows for a better understanding of the relationship between the condition of components and the overall operational quality of the vehicle.