Intake Manifold Mercedes W169 W245 OM640 Diesel Air Intake Unit A6400900337

Intake Manifold Mercedes W169 W245 OM640 Diesel Air Intake Unit is a factory-original air intake system component designed for OM640 diesel engines in compact Mercedes A-Class and B-Class models. This used manifold ensures the preservation of original flow geometry, which promotes stable engine operation and proper interaction with engine accessories. Choosing an original intake manifold is a sensible solution for users expecting predictable performance parameters and solid durability.

Specifications and technical data

• SKU: A6400900337
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400900337
• Substitutable numbers: A6400900337, A 640 090 03 37, KZ
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Manifolds & Headers

Purpose and function of the intake manifold

The intake manifold in the OM640 diesel engine is responsible for the even distribution of air to individual cylinders, which has a direct impact on engine refinement, performance, and fuel consumption. In Mercedes W169 and W245 models, a correctly selected manifold supports stable boost pressure, proper operation of the exhaust gas recirculation system, and predictable throttle response. Using an original component allows for the maintenance of factory flow parameters, reducing the risk of issues such as rough engine idling or power loss.

Compatibility with the OM640 engine and exhaust system

The OM640 engine is a popular Mercedes diesel unit used in compact bodies, where the intake system and Exhaust manifolds form a cohesive gas flow management system. A properly selected intake manifold works in conjunction with the turbocharger, EGR system, and exhaust manifold, which translates into correct cylinder filling and efficient exhaust gas discharge. Thanks to the preservation of the factory design, this component facilitates diagnostics and maintenance, as operating parameters remain consistent with the manufacturer's specifications.

If you want to better understand the relationships between the intake, turbocharger, and exhaust system, and are considering installing used components, it is worth reading the guide: performance exhaust systems and used manifolds in Mercedes and other car brands.

Vehicle placement and installation aspects

The intake manifold in this application operates in the front part of the engine bay, in the immediate vicinity of the cylinder head and engine accessories. Such placement facilitates service access but requires precise installation to ensure connection tightness and proper support for hoses and sensors. Manifold replacement should be performed in accordance with the manufacturer's procedures, including checking the mating surfaces and the condition of seals, which minimizes the risk of intake leaks and incorrect sensor readings.

Benefits of using an original used component

Choosing an original, used intake manifold for a Mercedes W169/W245 with a diesel engine is a compromise between cost and maintaining factory specifications. Such a component:

• maintains compatibility with the OM640 engine design and factory accessories,
• reduces the risk of fitment issues typical of aftermarket parts of uncertain origin,
• facilitates the mechanic's work thanks to the predictable layout of mounts and connection ports,
• promotes the maintenance of stable combustion parameters in the diesel engine.

For workshops and users, this means more predictable installation time and a lower risk of needing additional modifications. Combined with a properly functioning exhaust system and turbocharger, the intake manifold is an important element affecting the overall efficiency of the power unit.

Expanding the system within the same parts group

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional manifold sections, connections, or parts interacting with the turbocharger, check the available parts in the category Mercedes exhaust manifolds.

If you want to reduce vehicle downtime in the workshop and make better use of parts availability from a single warehouse, the article describing repair organization and component selection may be helpful: how a wide assortment in one warehouse speeds up car repair.