Mercedes W164 W221 OM642 Diesel Engine Gear Oil Pump A6421801600

Mercedes W164 W221 OM642 Diesel Engine Gear Oil Pump is an original lubrication system component designed for OM642 diesel units, used in models such as the M-Class W164 and S-Class W221. As part of the Oil pumps and parts group, it ensures a stable supply of oil to the engine at the correct pressure, which translates into safe and predictable operation of the power unit. This used OEM component is a sensible choice for professional repairs or overhauls of diesel engines in Mercedes vehicles.

Specifications and technical data

• SKU: A6421801600
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421801600
• Substitutable numbers: A6421801600, A 642 180 16 00
• Fuel type: Diesel
• Part type: Oil Pump
• Category: Oil Pumps & Parts

Purpose and role in the OM642 Diesel engine

The presented oil pump is a component designed for OM642 family diesel engines, where it is responsible for maintaining the proper oil pressure throughout the lubrication system. A correctly selected pump minimizes the risk of seizing of mating parts, stabilizes the operating conditions of the crankshaft, bearings, and timing system, and supports the durability of the turbocharger.

In engines installed in Mercedes M-Class W164 and S-Class W221, the lubrication system is crucial for maintaining the refinement and longevity of the power unit. Using an original oil pump allows for maintaining the parameters specified by the manufacturer, which is particularly important in demanding high-torque diesel units.

Benefits of using an original Mercedes oil pump

Choosing an original oil pump for a Mercedes brings a number of practical benefits in daily vehicle operation:

• maintaining factory oil pressure parameters across the entire engine speed range,
• better compatibility with the lubrication system designed for OM642 units,
• reducing the risk of premature wear of engine components,
• consistency with service documentation and manufacturer procedures.

As a result, the oil pump provides a solid foundation for further service work on the diesel unit, and the use of an OEM component facilitates diagnostics and subsequent maintenance in professional workshops.

Product characteristics and installation

The pump belongs to the Oil pumps and parts group, which means it is structurally prepared to work in the demanding environment of a diesel engine. The element has been designed to work with the factory Mercedes lubrication system, which facilitates installation in place of a worn pump without the need to modify other subassemblies.

As a used part, the pump is intended for users and workshops looking for a compromise between repair costs and maintaining the original manufacturer's specifications. With proper installation and the use of the appropriate engine oil, it can be an effective solution for repairing OM642 Diesel units.

Application in Mercedes W164 and W221 vehicles

The OM642 Diesel engines used in Mercedes M-Class W164 and S-Class W221 are designs with advanced architecture, where the lubrication system has a direct impact on the durability of the entire powertrain. Using an original oil pump dedicated to these units allows for maintaining the operating parameters intended by the manufacturer, which is important both in daily operation and during intensive vehicle use.

This type of oil pump will prove useful in situations where it is necessary to replace a worn element during an engine overhaul, after a lubrication system failure, or during preventive modernization of the power unit to extend its service life.

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as pump housings, drive gears, or lubrication system covers, check the available parts in the Mercedes Oil pumps and parts category.

Technical support and knowledge about Mercedes service

When planning work on Mercedes power units, it is worth relying on proven sources of knowledge to select the right components and avoid common service errors. An extensive discussion of the S-Class generation, including W221 models, along with an overview of essential service components can be found in the article Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years. Reading the material allows you to better understand the specifics of these designs and consciously plan repairs and modernizations.