Air Filter Box Mercedes W204 W212 OM642 Air Intake Housing Left N/S A6420901901

Visual condition of the part 

The product shows signs of use visible in the photos. 

Air Filter Box Mercedes W204 W212 OM642 Air Intake Housing Left N/S is a component from the Air filters category, designed for the intake systems of OM642 diesel engines. It enables efficient cleaning of the intake air on the left side of the engine bay, supporting stable engine operation and correct combustion characteristics. Thanks to its factory-fit design for Mercedes vehicles, it serves as a practical maintenance solution for users who value technical component consistency.

Specifications and technical data

• SKU: A6420901901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420901901
• Substitutable numbers: A6420901901, A 642 090 19 01, BG
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Air Filters

Purpose and function in the intake system

The left air filter in the OM642 engine is responsible for separating contaminants from the air drawn into the cylinders on one side of the intake system. A properly selected component limits the ingress of dust and fine particles, which is crucial for the durability of the power unit and the stability of operating parameters under load. In the case of diesel engines such as the OM642, proper air filtration is particularly important due to high compression pressures and the sensitivity of the injection system to mixture quality.

Compatibility with the OM642 engine

The presented filter has been designed with the architecture of the OM642 engine used in Mercedes W204 and W212 models in mind. The appropriate housing shape and fitment for the left side of the engine bay allow for maintaining proper airflow and integration with the stock intake system. This makes it possible to maintain the factory operating characteristics of the engine without the need to modify other components.

Technical characteristics and installation

The filter belongs to the group of consumable parts that require periodic inspection and replacement in diesel engines. Its location on the left side of the vehicle requires attention to proper orientation during installation to ensure system tightness and avoid leaks at the connection points with the intake ducts. Using a component that meets the vehicle manufacturer's requirements helps maintain uniform cylinder filling and proper turbocharger operation.

Component condition and service application

The offered air filter is a used part, making it a solution for users looking for components with factory fitment at a more budget-friendly service cost. It can be used both for routine intake system maintenance and for repairs involving the replacement of the filter housing or related components on the left side of the engine bay. Proper selection of the component for the specific diesel engine version helps reduce the risk of airflow issues and improper engine operation.

Mercedes air filters – expansion and modernization of the intake system

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other items from the same group, such as filter inserts, housings, or intake ducts, check out the available parts in the Mercedes air filters category.

Additional technical and operational information

When working with diesel engines, it is worth paying attention to the condition of the entire intake path – from the air inlet, through the filter, to the manifolds and components interacting with the exhaust system. A properly selected filter on the left side supports an even distribution of loads between the sides of the intake system, which is significant for the refinement of the OM642 unit and parameter stability during long-term operation. For users interested in a broader perspective on exhaust flow and the impact of modifications on engine characteristics, an article discussing exhaust system solutions may be helpful – more information can be found in the material Performance exhaust system: used manifolds and sports catalytic converters on the road.