Injection Mercedes W169 W245 OM640 Diesel High Pressure Fuel Pump A6400700701

Mercedes W169 W245 OM640 Diesel Fuel Injection Pump A6400700701 is an original, used high-pressure pump from the Fuel Pumps and Level Sensors group, designed for OM640 diesel engines. It provides a solid foundation for professional repair of the fuel system in Mercedes A-Class W169 and B-Class W245 vehicles with a Diesel engine, ensuring proper fuel preparation for injection.

Specifications and technical data

• SKU: A6400700701-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400700701
• Substitutable numbers: A6400700701, A 640 070 07 01
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The offered injection pump is the component responsible for generating high fuel pressure in the common rail system of OM640 diesel engines. A correctly selected pump ensures stable operating pressure, which translates to smooth engine operation, correct fuel dosage, and reduced smoke and power loss.

Due to its dedication to Diesel units, the pump's design is adapted to the operating parameters of diesel engines – both in terms of pressure characteristics and resistance to thermal and mechanical loads typical for this type of drive.

Benefits of Using an Original Mercedes Pump

Using an original injection pump in Mercedes A-Class and B-Class vehicles with an OM640 engine allows for the preservation of the fuel system's factory operating parameters. In practice, this means:

• correct cooperation with the factory engine control unit and injection equipment,
• stable pressure on the common rail across the full load range,
• better engine running smoothness compared to low-quality aftermarket parts,
• reduced risk of errors related to insufficient fuel pressure.

For users seeking parts with confirmed compatibility for a specific engine version, choosing an original pump from the Fuel Pumps and Level Sensors group is a technically safe and predictable solution.

Product Characteristics and Condition

The pump is a used part, removed from a vehicle, and offered for economical repair of the fuel system while maintaining the original manufacturer's specifications. This type of component is particularly attractive when a brand-new pump is expensive or difficult to obtain, and maintaining compatibility with the original engine equipment is a priority.

Thanks to its original construction, installing the injection pump in place of a worn-out component is a predictable process for an experienced mechanic – without the need for adapter modifications or fuel system alterations, provided the selection is made according to the manufacturer's markings.

Selection by Markings and Compatibility

When selecting an injection pump for a specific Mercedes model, it is crucial to compare manufacturer markings and engine parameters. In practice, it is advisable to use the vehicle's VIN and the OEM part number to avoid compatibility issues. Correct selection ensures proper cooperation with the common rail, injectors, and engine control unit.

If you want to deepen your knowledge on safely choosing used electronic components and sensors in modern cars, the Global Parts guide will be helpful: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?. Although it mainly concerns electronics, it describes universal principles for selecting parts by OEM numbers and in terms of compatibility.

Support for Fuel System Expansion

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other components from the same group, such as additional pumps, power modules, or fuel level sensors, check the available parts in the Mercedes Fuel Pumps and Level Sensors category.

For drivers who want to make informed choices about used components for popular car models, a practical guide to the aftermarket may also be useful: Best Used Car Parts – A Guide to the Most Frequently Chosen Original Parts. It helps to better assess when purchasing a used injection pump is a technically justified solution.