Mercedes W204 W212 OM651 Diesel Air Intake Pipe Air Filter Hose A6510900437

Mercedes W204 W212 OM651 Diesel Air Intake Pipe Air Filter Hose is a factory-original intake system component designed for OM651 diesel engines used in popular C-Class and E-Class models. It is responsible for the stable delivery of air to the power unit, which promotes smooth engine operation, proper boost pressure, and the maintenance of correct combustion parameters. Choosing an original intake pipe is a reliable solution for repairs and maintenance of the air intake system.

Specifications and technical data

• SKU: A6510900437-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510900437
• Substitutable numbers: A6510900437, A 651 090 04 37
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The intake pipe in the OM651 diesel engine is responsible for directing air from the filtration and turbocharging system to the intake manifold. A properly selected component:

• ensures a tight connection between individual intake components,
• reduces air pressure drops in the system,
• stabilizes airflow, which promotes efficient turbocharger operation,
• minimizes the risk of contaminants entering the engine.

As a result, the intake system maintains its designed parameters, and the power unit operates in a predictable, repeatable manner, which is important for both performance and durability.

Benefits of using an original intake pipe

Using an original intake hose in the OM651 engine provides measurable operational benefits:

• Proper geometry and flow diameter – matched to the airflow characteristics of the specific diesel engine.
• Compatibility with factory equipment – secure fitment to stock clamps, connectors, and adjacent components.
• Reduction of the risk of leaks that could cause power loss, ECU errors, or increased fuel consumption.
• Consistency with the factory intake system design, which facilitates diagnostics and future servicing.

For users who want to restore the efficiency of the intake system after a failure, crack, or wear of the previous component, such a pipe is a practical and technically sound choice.

Characteristics of the used component

The offered intake pipe is a used part, sourced from vehicle dismantling. Such components are frequently chosen for repairs because they allow for maintaining factory specifications at a lower cost compared to new aftermarket replacements. In the case of intake system components, it is crucial to maintain proper rigidity, shape, and tightness – which is why original parts from dismantling often perform better than low-quality replacements.

Before installation, it is recommended to perform a standard visual inspection for any mechanical damage and ensure proper seating in the vehicle in accordance with the manufacturer's service procedure.

Application in OM651 diesel engines

OM651 diesel engines used in Mercedes C-Class (W204) and E-Class (W212) are sensitive to the tightness and patency of the intake system. An intake pipe matched to this unit:

• supports the proper operation of the turbocharger and exhaust gas recirculation system,
• helps maintain stable boost pressure values,
• promotes uniform cylinder filling with air, which affects engine refinement and exhaust emissions.

When replacing components in a diesel engine, it is worth paying attention to the consistency of the parts used with the original design – this applies especially to lines, hoses, and pipes that form the complete airflow system.

Support with selection and related components

If you are planning a comprehensive repair of the intake system or are looking for other elements such as lines, hoses, or pipes for your Mercedes, it is worth browsing the full offer in the Lines, hoses, and pipes{data-blogs=category} category. This will make it easier to select components from the same group and maintain the consistency of the entire system.

When making a decision about using parts from dismantling, guide materials may also be helpful. You can find more about the conscious choice of used body parts and other components in the article: Replacing body parts with used ones – can dismantled parts look like new?. This will make it easier for you to assess when a used part is a reasonable and technically safe solution.