Mercedes W221 OM642 Diesel Air Filter Box Housing Right O/S A6420903601

The Mercedes W221 OM642 Air Filter Housing Right is an original intake system component designed for diesel engines, ensuring stable air delivery to the engine. Thanks to its factory design for the W221 series with the OM642 engine, the housing guarantees proper filter seating and secure mounting on the right side of the engine bay. This is a practical solution for users looking for a proven, factory-compliant air filter housing for their Mercedes.

Specifications and technical data

• SKU: A6420903601
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420903601
• Substitutable numbers: A6420903601, A 642 090 36 01, A6420904401, A 642 090 44 01, A6420903001, A 642 090 30 01
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Air Filter Housings

Intended Use and Fitment for Mercedes W221 OM642

The presented housing belongs to the Air Filter Housings category and has been specifically designed for the Mercedes S-Class W221 generation with the OM642 diesel engine. The component's construction is adapted for use with a diesel-powered unit, which translates to appropriate airflow and compatibility with the factory intake system.

Its placement on the right side of the vehicle allows for seamless installation in the original mounting points, without the need for modifications or bracket adjustments. This makes the housing a functional solution for replacing a damaged or leaky component in the standard engine configuration.

Construction and Function of the Air Filter Housing

The air filter housing is responsible for sealing the filter element and directing the flow of air drawn into the engine. For diesel engines like the OM642, this is important for:

• maintaining the proper cleanliness of air supplied to the cylinders,
• stable airflow under varying engine loads,
• limiting the ingress of contaminants into the intake system.

A well-chosen air filter housing supports the correct operation of the turbocharging and exhaust gas recirculation systems, which is particularly crucial in modern diesel engines. Using an original Mercedes part helps maintain the engine's performance parameters close to factory levels.

Vehicle Placement and Diesel Version Specifics

The component is intended for installation on the right side of the engine bay, which is important for both the routing of intake ducts and service access to the filter element. This placement facilitates periodic air filter replacement and inspection of the intake hoses.

The housing has been prepared for use with a diesel-powered engine. In practice, this means its geometry and air routing are adapted to the airflow characteristics of diesel units, where maintaining appropriate air pressure and volume during turbocharging is essential.

Condition, Origin, and Benefits of Using a Used Part

The offered item is a used part, sourced from a dismantled Mercedes vehicle. Choosing this option is beneficial for users who want to maintain factory quality and fit while reducing costs compared to purchasing a new component.

Using an original air filter housing allows for:

• maintaining compliance with the original intake system design,
• avoiding fitment issues typical of aftermarket parts with universal designs,
• maintaining the correct position of sensors and hoses cooperating with the housing.

How to Verify Compatibility Using OEM Numbers

Before purchasing, it is advisable to compare part numbers and interchangeable numbers with your vehicle's details to ensure the housing will be fully compatible with your specific engine version and year. Proper identification by OEM numbers is particularly important for intake system components, where design differences can arise from equipment versions or emission standards.

If you want to learn how to effectively check component compatibility by numbers, the guide will be helpful: Risk-free online parts shopping – checking compatibility by OEM numbers. You will find practical tips there on verifying Mercedes parts, including intake system components.

Other Mercedes Air Filter Housings

If you are also looking for other air filter housings for this brand's cars, check out the dedicated category Mercedes Air Filter Housings, where you will find a wide selection of parts tailored to various models and engine versions.