Fuel Pump Mercedes W203 W211 W639 W906 OM646 High Pressure Pump A6460700101

Mercedes W203 W211 W639 W906 OM646 Fuel Injection Pump HPFP A6460700101 is a specialized, high-pressure fuel pump designed for OM646 diesel engines in Mercedes vehicles. As a component from the Fuel Pumps & Level Sensors category, it is responsible for precise fuel supply to the injection system, ensuring stable engine operation. This used genuine Mercedes part offers a functional service solution for demanding fleet and individual users.

Specifications and technical data

• SKU: A6460700101-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460700101
• Substitutable numbers: A6460700101, A 646 070 01 01, 0445010078, 0 445 010 078
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and Role in the Fuel System

The HPFP (High-Pressure Fuel Pump) used in OM646 engines is responsible for generating the correct fuel pressure in the common rail system. It is a crucial element for proper injector operation, stable starting, and smooth engine performance across the entire load range. Using a dedicated pump for the Mercedes W203, W211, W639, and W906 series helps maintain the engine's factory performance parameters.

The system is designed for Diesel fuel type, meaning its construction is adapted to the characteristics of diesel fuel, its viscosity, and the pressure requirements of modern diesel engines.

Benefits of Using an Original Mercedes Pump

Choosing an original Mercedes injection pump translates into a number of practical operational benefits:

• maintaining compliance with the OM646 engine's factory operating characteristics,
• proper interaction with the control electronics and injection system,
• correct fuel pressure parameters across the entire RPM range,
• reducing the risk of starting problems and rough idling,
• improved engine refinement under load.

By adhering to the manufacturer's specifications, the HPFP injection pump supports correct fuel atomization, which contributes to efficient combustion and stable engine performance.

Condition, Verification, and Selection by Numbers

The offered pump is a used component, which in service practice often represents a reasonable compromise between repair cost and maintaining original construction. Selection is based on the OEM part number and available interchangeable numbers, allowing for precise matching to a specific engine and body version.

To better understand the relationships between the pump, injectors, and fuel tank, and to properly perform diagnostics, repair, or replacement, it is worth consulting the guide Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which discusses part selection by OEM numbers and common wear symptoms.

Professional Application in Service and Operation

The high-pressure fuel injection pump for the OM646 engine is suitable for both professional workshops and individual applications where technical repair accuracy is paramount. This is particularly important for commercial and delivery vehicles, where engine stability directly impacts vehicle availability and operating costs.

For users considering different repair strategies – between new parts, aftermarket alternatives, and used components – the guide Original, Aftermarket, or Used – Which Car Parts Are Most Cost-Effective? may be helpful, discussing the cost-effectiveness of various solutions in terms of quality and fit.

Related Mercedes Fuel Pumps & Level Sensors

If you are planning to replace other fuel system components during the same service, such as auxiliary pumps, fuel modules, or fuel level sensors dedicated to this brand, check the available parts in the Mercedes Fuel Pumps & Level Sensors category.