Exhaust Manifold Mercedes W207 W212 Diesel OM642 Right Exhaust Pipe A6421400809

Exhaust Manifold Mercedes W207 W212 Diesel OM642 Right Exhaust Pipe is a factory exhaust system component designed for OM642 diesel units, mounted on the right side of the engine. It is responsible for the efficient discharge of exhaust gases from the cylinder head, stabilizing the operation of the power unit and supporting correct performance parameters. Thanks to a design consistent with the manufacturer's solutions, it represents a functional and technically matched service solution for Mercedes W207 and W212 diesel models.

Specifications and technical data

• SKU: A6421400809-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421400809
• Substitutable numbers: A6421400809, A 642 140 08 09
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The presented exhaust manifold is a component from the Exhaust manifolds group, designed to work with the OM642 diesel engine in Mercedes W207 and W212 class cars. Its task is to collect exhaust gases from individual cylinders and direct them to the subsequent elements of the exhaust system, while maintaining proper flow and resistance to thermal loads.

The placement on the right side of the power unit ensures compatibility with the factory geometry of the engine bay, accessories, and heat shields. A properly selected manifold reduces the risk of leaks, power drops, and incorrect turbocharger operation, which is important for both engine durability and driving comfort.

Benefits of using an original Mercedes manifold

Using an original exhaust manifold dedicated to the Mercedes with an OM642 diesel engine allows for maintaining factory exhaust flow parameters and fitment to the cylinder head. This solution is particularly beneficial for repairs related to:

• leaks in the exhaust system near the cylinder head,
• performance drops resulting from leaks or damage to the manifold,
• the need to replace the component after overheating or cracking.

A well-selected manifold on the right side of the OM642 engine helps maintain stable exhaust pressure, which promotes the correct operation of the turbine and the charging system. In practice, this translates into more predictable power unit performance characteristics and a reduction in unwanted vibrations and noise in the engine bay.

Installation and operational characteristics

The offered component is intended for installation at factory mounting points on the right side of the OM642 diesel engine, which facilitates service work and reduces replacement time. The manifold construction is adapted to high temperatures and loads typical for diesel units, making it perform well in daily operation, even under intensive vehicle use.

The product comes from a group of used parts, which allows for economical repair while maintaining original geometry and compatibility with other exhaust system components. This is a practical solution for users who want to restore the efficiency of the exhaust system in their Mercedes without having to resort to replacements with uncertain parameters.

Application in OM642 diesel engines

OM642 diesel engines used in Mercedes W207 and W212 models require properly selected exhaust system components to maintain correct exhaust pressure, operating temperature, and emission parameters. The exhaust manifold on the right side plays an important role in this system – it is responsible for the even discharge of exhaust gases from this part of the cylinder head and cooperation with other system components.

Choosing a dedicated manifold for the OM642 diesel engine helps reduce the risk of problems such as whistling, knocking, or the smell of exhaust fumes in the cabin resulting from leaks. This is especially important in vehicles used on longer routes, where the thermal and mechanical stability of the exhaust system has a direct impact on user comfort.

Exhaust system expansion and additional materials

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, connecting sections, or mounting elements, check out the available parts in the Mercedes Exhaust manifolds category.

For users interested in a broader look at the exhaust system, the selection of used manifolds, and the impact of modifications on engine performance, we have prepared a practical guide. More information can be found in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses, among other things, the selection of components for brands such as Mercedes, BMW, Audi, VW, and Mini.