Mercedes W164 OM629 Diesel High Pressure Fuel Pump A6290700001

Mercedes W164 OM629 Diesel High Pressure Fuel Pump is a component from the High pressure fuel pumps group, designed for OM629 diesel engines in Mercedes SUV vehicles. A used high-pressure fuel pump of this type allows for a technically correct repair of the fuel supply system, maintaining the factory performance parameters of the engine and consistency with the original fuel system architecture.

Specifications and technical data

• SKU: A6290700001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290700001
• Substitutable numbers: A6290700001, A 629 070 00 01
• Fuel type: Diesel
• Category: High Pressure Fuel Pumps

Purpose and role in the fuel system

The presented high-pressure fuel pump is a component designed for the OM629 diesel engine installed in the Mercedes W164 class. It is responsible for generating sufficiently high fuel pressure in the rail, which is crucial for the proper operation of the injectors and stable engine performance across the entire load range.

Thanks to a design tailored to the specific engine type, the pump works with the factory engine management system, ensuring proper fuel metering, smooth idling, and correct response to load. Using a dedicated component reduces the risk of starting problems, power drops, or unstable RPMs.

Benefits of using an original high-pressure fuel pump

Choosing a high-pressure fuel pump matched to the Mercedes W164 with an OM629 engine allows for maintaining the integrity of the entire fuel system. The original design ensures:

• proper cooperation with the engine control system and pressure sensors,
• stable fuel rail pressure under typical operating conditions,
• proper preparation of Diesel fuel for injection at various operating temperatures.

A used component from this group is a good solution for repairs where maintaining the factory engine performance characteristics while optimizing costs is a priority. High pressure fuel pumps of this type are designed for long-term operation in demanding conditions typical for heavier SUV vehicles.

Condition, verification, and fitment

The high-pressure fuel pump offered in this listing is in used condition, meaning it has been removed from a vehicle and verified for further serviceability. It is recommended to select this type of component based on the manufacturer's markings and compatibility with the specific version of the OM629 engine to avoid issues with installation and system operation.

Before installation, it is recommended to perform standard fuel system maintenance, such as checking filters, lines, and connection tightness. A correctly selected and installed high-pressure fuel pump contributes to maintaining smooth engine operation, reducing smoke, and improving the refinement of the diesel unit.

Fuel system operation and technical knowledge

To maximize the potential of this high-pressure fuel pump in a Diesel engine, it is worth familiarizing yourself with the principles of diagnostics and maintenance of the entire fuel supply system. Detailed information on the operation of injectors, pumps, and the fuel tank, as well as selecting parts by identification numbers and regeneration principles, can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you want to better care for used components and extend their service life in your car, the guide How to extend the life of used car parts? may also be helpful, as it describes practical methods for maintenance and component condition checks.

Related Mercedes High pressure fuel pumps

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 pumps, supply lines, or pressure control elements, check the available parts in the Mercedes High pressure fuel pumps category.