Mercedes W169 W245 OM640 Diesel Engine Exhaust Manifold A6401420801

Mercedes W169 W245 OM640 Diesel Engine Exhaust Manifold is a factory exhaust system component designed for Mercedes diesel engines. This used manifold from this series ensures the preservation of the original exhaust gas flow geometry, which promotes stable engine operation and proper interaction with the turbocharger. It is a practical solution for users looking for a technically compatible component at a reasonable price.

Specifications and technical data

• SKU: A6401420801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401420801
• Substitutable numbers: A6401420801, A 640 142 08 01
• Fuel type: Diesel
• Category: Manifolds & Headers

Purpose and compatibility with the OM640 engine

The presented exhaust manifold is structurally prepared for use with the Diesel engine from the OM640 family used in Mercedes compact class models. Properly shaped exhaust channels help maintain the correct pressure in the system, which is important for engine dynamics and the proper operation of accessories.

The original casting architecture ensures proper positioning at the cylinder head and in the connection zone to the rest of the exhaust system, which reduces the risk of leaks and unwanted thermal stress.

Technical and functional characteristics

The exhaust manifold in a diesel engine is responsible for collecting exhaust gases from individual cylinders and directing them to the subsequent components of the system. In the case of diesel units, resistance to high temperatures and repetitive heating and cooling cycles is essential, which is why the design of this component is engineered for long-term operation.

A properly selected manifold:

• stabilizes exhaust gas flow at low and medium RPM,
• reduces the risk of local overheating in the area near the cylinder head,
• supports the proper operation of the turbocharger and the exhaust gas recirculation system,
• facilitates maintaining compliance with factory engine operating parameters.

Used condition and installation aspects

The item comes from the Exhaust manifolds category and is offered as a used part, which allows for an economical repair of the exhaust system while maintaining the manufacturer's original specifications. This type of component is particularly useful when replacing a damaged or cracked manifold, especially when maintaining factory fitment to the cylinder head and accessories is a priority.

Before installation, it is recommended to perform a standard verification of the mating surfaces, threads, and base flatness, as well as to use new gaskets and appropriate tightening torques in accordance with Mercedes service documentation. This approach increases the chance of a tight and durable installation without the need for additional corrections.

Benefits of using an original Mercedes manifold

Choosing an original exhaust manifold for a Mercedes allows you to maintain the consistency of the entire powertrain. Factory fitment translates into correct connection positioning, compatibility with heat shields, and predictable behavior under high thermal load conditions. This is particularly important in diesel engines, where the exhaust system operates under heavy load for extended periods.

Such a solution is beneficial both for workshops specializing in the Mercedes brand and for individual users who expect stable engine performance after a repair.

Exhaust 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 manifolds, connection sections, or components working with the turbocharger, check the available parts in the Mercedes Exhaust manifolds category.

For users interested in a broader look at the exhaust system and the possibilities of using used components in projects focused on improving 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.