Mercedes W204 OM642 Diesel Oil Pump A6421802001

Mercedes W204 OM642 Diesel Oil Pump A6421802001 is an original part from the Oil Pumps and Parts category, designed for OM642 diesel engines. The used Mercedes oil pump ensures stable lubrication of the powertrain, which translates to safe operation of the diesel engine and reduces the risk of costly failures.

Specifications and technical data

• SKU: A6421802001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421802001
• Substitutable numbers: A6421802001, A 642 180 20 01
• Fuel type: Diesel
• Category: Oil Pumps & Parts

Purpose and Function in the OM642 Engine

The oil pump in the OM642 diesel engine is responsible for maintaining adequate oil pressure throughout the lubrication system. For diesel units operating under heavy load, a properly functioning pump is crucial for the durability of bearings, crankshaft, turbocharger, and timing components. Using an original Mercedes component allows for operational parameters consistent with the manufacturer's factory specifications.

Benefits of Using an Original Mercedes Oil Pump

Choosing an original oil pump for the Mercedes W204 with an OM642 diesel engine is a solution that helps maintain stable oil pressure across a wide range of RPMs. This results in:

• reduced risk of engine seizure under heavy load,
• faster achievement of operating parameters by the lubrication system after startup,
• more predictable operating conditions for cooperating components (e.g., crankshaft, camshafts),
• easier compliance with the vehicle manufacturer's service recommendations.

For users who operate their vehicles in demanding conditions, an original Mercedes oil pump is a sensible choice in terms of reliability and compatibility with the factory lubrication system.

Product Characteristics and Condition

The offered oil pump belongs to the Oil Pumps and Parts group and comes from a Mercedes vehicle with a diesel engine. The item is used, which means that before installation, it is advisable to verify its visual condition and possibly conduct an additional workshop inspection, in accordance with the procedures adopted in professional services. This type of component is particularly useful for major engine repairs, replacing a damaged pump, or assembling a powertrain after a failure.

Application in Service Practice

The oil pump for the Mercedes W204 with an OM642 diesel engine is suitable for both routine repairs and larger overhaul projects. It can be used, among other situations, when:

• oil pressure drops in the lubrication system have been detected,
• mechanical damage to the existing pump has occurred,
• the engine is being assembled with original parts after a major overhaul,
• the pump needs to be replaced as a preventative measure for a high-mileage unit.

By maintaining its factory design, the Mercedes diesel engine oil pump collaborates with original oil channels and accessories, which facilitates installation and reduces the risk of fitting problems.

Related Parts and Technical Knowledge

If you are assembling a lubrication system or planning a broader range of work on the powertrain, it is worth considering other components from the lubrication group, such as oil lines, seals, or mounting elements. To select additional parts from the same brand in a way that is consistent with factory solutions, check the available parts in the Mercedes Oil Pumps and Parts category.

For those interested in a broader context of technical solutions used by the manufacturer, including the evolution of powertrains and related components, an article discussing the development of the brand's flagship models may be helpful – you can find it here: Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years.