Mercedes W204 W211 Outlet Camshaft Sprocket Right O/S OM642 Diesel A6420521801

Mercedes W204 W211 Outlet Camshaft Sprocket Right O/S OM642 is a precision timing system component designed for diesel engines of this series. It is responsible for stable power transmission to the exhaust camshaft on the right side, which translates into proper valve operation and smooth engine performance. This solution is dedicated to users looking for a proven, original component from the Sprockets group for a diesel engine.

Specifications and technical data

• SKU: A6420521801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420521801
• Substitutable numbers: A6420521801, A 642 052 18 01
• Location on the vehicle: Right
• Fuel type: Diesel
• Part type: Sprocket
• Category: Sprockets

Purpose and function in the OM642 engine

The described camshaft sprocket works with the exhaust camshaft on the right side of the engine, ensuring proper synchronization of valve opening and closing. In diesel engines such as the OM642, stable timing phase control is crucial for achieving the appropriate torque, reducing smoke, and maintaining correct exhaust emissions. Thanks to its fitment for the specific cylinder head and exhaust camshaft configuration, the camshaft sprocket guarantees:

• correct power transmission from the timing system to the exhaust camshaft,
• maintenance of proper valve operation geometry,
• stable engine operation across the full rev range.

Vehicle compatibility and positioning

The element has been designed for use in Mercedes W204 and Mercedes W211 models equipped with a diesel engine. Positioning on the right side of the engine requires the use of a sprocket with a properly selected tooth profile and geometry, which allows for seamless integration with the existing timing system. Precise fitment to the specific diesel engine variant reduces the risk of installation problems and facilitates the mechanic's work, especially during complex cylinder head repairs or timing component replacements.

Characteristics of the used component

The camshaft sprocket comes from dismantling, which means it is a used part that retains its functional properties. Such components are often chosen by conscious users who prefer original design solutions over cheap replacements of uncertain durability. In the case of elements from the Sprockets group, it is particularly important to maintain the appropriate tooth profile and compatibility with other parts of the timing system. An original sprocket from dismantling allows for maintaining factory engine performance parameters, which is important for both the durability of the unit and driving comfort.

Benefits of using an original camshaft sprocket

Choosing this exhaust camshaft sprocket brings a number of practical benefits in daily vehicle operation:

• preservation of the factory operating characteristics of the diesel engine,
• better cooperation with the existing timing system and exhaust camshaft,
• reduction of the risk of premature wear of other timing components. For workshops and individual users, this means a more predictable repair result and the ability to keep the OM642 unit within parameters close to factory specifications.

Expanding the timing system in a Mercedes

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 camshaft sprockets, mating gears, or related drive components, check the available parts in the Mercedes Sprockets category. For drivers interested in a broader context of selecting parts from dismantling and comparing them with cheap replacements, the following guide article may be helpful: The most popular repairs in Ford cars – why a used original is sometimes better than a cheap replacement. Although it concerns a different brand, it well illustrates the approach to conscious component selection based on build quality and durability.