Driver Crank Mercedes W639 W906 OM651 Diesel Fuel Pump A6510770109

Visual condition of the part 

The product shows signs of use visible in the photos. 

Driver Crank Mercedes W639 W906 OM651 Diesel Fuel Pump is a precision drivetrain component designed for diesel engines, responsible for the stable transmission of drive to the fuel injection pump. Thanks to its factory-fit design for the OM651 unit and installation in the front part of the vehicle, it ensures consistent operation of the entire fuel system. This is a solution for users seeking original geometry, secure fitment, and predictable diesel engine performance.

Specifications and technical data

• SKU: A6510770109
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510770109
• Substitutable numbers: A6510770109, A 651 077 01 09
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and role in the fuel system

The injection pump drive shaft in the OM651 engine is responsible for the mechanical coupling of the drive to the high-pressure pump, which directly affects how fuel is metered in the diesel unit. A properly selected component in this area allows for maintaining stable fuel system operation, reducing vibrations, and ensuring repeatable injection parameters across the entire RPM range.

In the case of diesel units such as the OM651, the precision of the shaft's manufacturing and its correct seating in the front of the engine are crucial for pump durability, proper lubrication, and maintaining the correct drive geometry. Using a dedicated component for specific Mercedes engine series minimizes the risk of improper meshing and accelerated wear of cooperating components.

Compatibility with the diesel system and installation in the front of the vehicle

The presented shaft is intended for use in diesel engines where maintaining the correct torque on the injection pump is critical. Its location in the front zone of the power unit facilitates service access during work on the timing system, pump, or accessory drive components.

Such a design solution promotes clear diagnostics and allows the mechanic to efficiently verify the condition of cooperating elements. For the user, this means the possibility of more predictable service maintenance and easier planning of repairs within the fuel system.

Benefits of using an original Mercedes component

Choosing an injection pump drive shaft dedicated to Mercedes vehicles allows for maintaining factory fuel system operating parameters and compliance with the manufacturer's design specifications. The original solution ensures proper fitment into housings, appropriate material hardness, and compatibility with other pump drive components.

A used component of this type is an attractive alternative to new parts, especially for maintenance repairs in vehicles with higher mileage. It allows for cost reduction while maintaining performance characteristics close to factory standards, which is essential for the durability of the injection pump and the entire diesel engine fuel supply system.

Technical support, selection, and knowledge about the fuel system

When selecting an injection pump drive shaft for a specific Mercedes vehicle, it is worth using the manufacturer's markings and vehicle data to ensure full compatibility with the engine unit used. Proper component selection affects engine refinement, noise levels, and the durability of cooperating sub-assemblies.

If you want to better understand the relationships between the pump, injectors, and fuel tank, as well as learn the principles of diagnostics and regeneration of these elements, check out the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where you will find practical tips, comparison tables, and answers to frequently asked questions.

If you are interested in why original components reused in repairs are often a beneficial compromise between quality and cost, the material OEM quality assurance and safety – why used original car parts are the best choice for your car?, which describes the importance of OEM parts in the context of safety and service economics, will be helpful.

Expanding the fuel system in a Mercedes

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as pumps, supply modules, or fuel level sensors, check the available parts in the category Mercedes fuel pumps and level sensors.