Mercedes W204 Intake Manifold Left Manifold OM642 Diesel V6 Engine A6420907037

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W204 Intake Manifold Left Manifold OM642 Diesel V6 Engine is an original component from the Intake manifolds group, designed for OM642 V6 diesel units. This used component allows for a technically correct repair of the intake system on the left side, while maintaining factory air flow geometry and compatibility with the diesel engine. It is a solution for users who expect a proven part with parameters consistent with Mercedes factory specifications.

Specifications and technical data

• SKU: A6420907037-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420907037
• Substitutable numbers: A6420907037, A 642 090 70 37
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Intake Manifolds

Purpose and function in the intake system

The presented left intake manifold is a component of the air supply system in the OM642 V6 diesel engine used in Mercedes W204 class models. It is responsible for the even distribution of air to the cylinders on one side of the power unit, which has a direct impact on stability, engine smoothness, and combustion parameters in the diesel engine.

Thanks to its factory design, the manifold works with the engine accessories intended for this unit, maintaining proper tightness and flow within the load range typical for modern diesel engines. Installation on the left side allows for the restoration of the original intake system without the need to modify other components.

Construction, fitment, and installation

The intake manifold has been designed specifically for the OM642 engine architecture, taking into account the limited engine bay space in the Mercedes W204. The geometry of the intake channels is adapted to the flow characteristics of the V6 unit, which helps maintain proper cylinder filling across the full RPM range.

The placement on the left side makes it easier for the mechanic to identify the correct element during replacement, minimizing the risk of selecting the wrong part. Original mounting points and sealing surfaces provided by the manufacturer allow for installation in accordance with service documentation, without the need for modifications or adaptations.

Benefits of using an original intake manifold

Using an original intake manifold in the OM642 diesel engine allows for the preservation of the power unit's factory operating parameters. A properly selected element on the left side reduces the risk of intake leaks, power loss, or unstable idle speed. This is particularly important in the case of modern diesel engines, where the intake system works with advanced electronic control.

For workshops and individual users, this means the ability to carry out repairs in a predictable and repeatable manner, while maintaining parameters close to factory standards. The used, original element from the Intake manifolds group represents a reasonable compromise between repair cost and quality and fitment for a specific Mercedes model.

Application in service practice

Replacement of the left intake manifold is recommended in situations where symptoms such as loss of intake system tightness, uneven engine operation, air flow-related errors, or mechanical damage to the manifold housing occur. In the case of OM642 V6 diesel units, the proper condition of the manifold is important for both performance and the correct operation of emission control systems.

The selection of the correct element for a Mercedes W204 with a diesel engine should take into account the mounting side and compatibility with the engine unit's design. The original left-side intake manifold allows for the restoration of proper intake system operation without interfering with other engine components.

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 additional manifolds, intake channel components, or intake housings, check the available parts in the Mercedes Intake manifolds category.

To better understand the relationships between the intake and exhaust systems and to consciously plan repairs and modifications in cars such as the Mercedes W204, it is worth reading the guide on our blog: Performance exhaust system: used manifolds and sports catalytic converters on the road.