Mercedes ML W166 Air Intake Tube Pipe OM651 Diesel Engine A6510901142

Mercedes ML W166 Air Intake Tube Pipe OM651 Diesel Engine is a factory-original component of the air intake system, designed specifically for the Diesel units of this series. It is responsible for the precise routing of air to the engine, which directly impacts stable operation, combustion efficiency, and the vehicle's performance parameters.

Specifications and technical data

• SKU: A6510901142
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510901142
• Substitutable numbers: A6510901142, A 651 090 11 42
• Fuel type: Diesel
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The air intake pipe in the Mercedes ML W166 with the OM651 engine is a critical component of the air intake path from the filter housing to other system components. Its properly shaped cross-section and fitment to the engine bay allow for stable airflow, reduced pressure drops, and minimized turbulence, which promotes uniform cylinder filling.

In diesel engines, it is particularly important to maintain airtightness and proper air routing, as any leaks in the intake pipe can result in power loss, increased fuel consumption, and engine control unit errors. Using an original pipe ensures proper cooperation with the diesel control system and the maintenance of factory operating parameters.

Benefits of using the original intake pipe

Compared to aftermarket replacements, the original intake pipe for the ML W166 with the OM651 engine offers:

• precise fitment to the mounts and geometry of the engine bay,
• retention of the factory diameter and shape of the flow channel,
• compatibility with diesel engine accessories,
• reduced risk of improper installation or material stress.

As a result, installation is efficient, and the intake system retains parameters close to factory specifications after replacement, which is particularly important in modern diesel units sensitive to any deviations in the quantity and quality of intake air.

Application in the OM651 Diesel engine

The OM651 engine is a modern diesel unit where the intake system works in conjunction with the turbocharger, exhaust gas recirculation system, and precise fuel injection control. A properly selected intake pipe:

• supports stable boost pressure,
• facilitates the maintenance of proper airflow characteristics,
• reduces the risk of air mass measurement interference by sensors.

For the user, this means more predictable throttle response, correct operation of emission control systems, and greater performance consistency in daily vehicle operation.

Characteristics of the used component

The offered intake pipe is a used component, which allows for an economical repair while maintaining the manufacturer's original specifications. In practice, this is a beneficial solution for drivers who want to restore the efficiency of the intake system in their Mercedes ML W166 while avoiding the costs of purchasing a new part, all while retaining the factory origin of the component.

Related components and additional information

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 flexible intake sections, connectors, or additional hose branches, check the available parts in the Mercedes lines, hoses and pipes category.

When planning broader service work within the powertrain, it is also worth checking out our guide on the cost-effectiveness of purchasing components from the secondary market, such as the article Used gearbox – when is it worth it and what you need to remember, which helps you make an informed approach to choosing used components for your car.