Mercedes ML W164 OM642 Diesel Air Filter Box Housing Cover Right O/S A6420902001

Mercedes ML W164 OM642 Diesel Air Filter Box Housing Cover Right O/S is a factory intake system component designed for diesel engines, mounted on the right side of the engine bay. Designed by Mercedes, the housing ensures proper airflow guidance, stable mounting of the filter element, and compliance with the requirements of the OM642 engine. As a result, it provides a functional service solution for users looking for the original intake geometry in their SUV.

Specifications and technical data

• SKU: A6420902001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420902001
• Substitutable numbers: A6420902001, A 642 090 20 01, A6420940204, A 642 094 02 04
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Air Filter Housings

Purpose and compatibility with the OM642 engine

The presented housing is an intake system component dedicated to the OM642 diesel engine used in the Mercedes ML W164 model. The design was developed for the specific airflow requirements of the Diesel unit, which allows for maintaining correct operating parameters, stable boost values, and proper filtration of the intake air.

The location on the right side of the engine bay facilitates service access to the filter element while ensuring repeatable routing of the intake ducts in accordance with the factory design. For the user, this means maintaining the original performance characteristics of the engine without the need to adapt universal solutions.

Construction and function in the intake system

The air filter housing performs several key functions in the intake system:

• ensures a tight seating of the filter element,
• stabilizes airflow before the turbocharger,
• protects the element from contaminants and moisture from the engine bay,
• enables correct connection of intake hoses and any flow sensors.

Thanks to its factory geometry, the housing maintains the correct direction and velocity of the airflow, which promotes smooth engine operation and reduces the risk of power drops resulting from an incorrect intake. Using the original design also helps avoid unwanted resonances and intake noise typical of non-factory solutions.

Characteristics of the used component

The offered housing comes from dismantling, which means it is a used part that retains the functionality required for further operation. For many users, this represents a reasonable compromise between cost and maintaining the original build quality characteristic of the Mercedes brand. This type of component is particularly useful for accident repairs, replacing a damaged housing after a crack, or restoring the factory intake configuration after previous modifications.

Using a used component allows for maintaining the structural integrity of the intake system, which is especially important in diesel engines sensitive to leaks and airflow disturbances. A properly selected housing promotes stable engine operation, correct functioning of the turbocharging system, and mixture control systems.

Benefits of using the original air filter housing

Choosing a factory air filter housing for a Mercedes ML W164 with an OM642 engine brings a number of practical benefits:

• Full installation compatibility – fits factory mounting points and intake hoses without modifications.
• Stable diesel engine operating parameters – maintaining the airflow designed by the manufacturer.
• Ability to use standard filter elements intended for this model.
• Reduced risk of leaks and incorrect air intake from the engine bay.

For workshops and individual users, this means faster installation, a predictable service result, and maintaining a configuration consistent with the vehicle's technical documentation. Combined with a properly selected filter element, the housing supports long-term, smooth operation of the engine.

Intake system expansion and additional information

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 housings, intake ducts, or mounting elements, check the available parts in the Mercedes Air Filter Housings category.

When planning service work, especially before the cold season, it is worth paying attention to the condition of the intake system components, filtration, and other parts exposed to moisture and road salt. Practical tips on preparing your vehicle for winter, checklists, and a discussion on which used components are worth verifying or replacing can be found in the article Winter essentials: which used car parts are worth checking and replacing before the frost?.