Mercedes ML W164 OM642 Fuel Pump Diesel Sender Control Unit A1644700394

Mercedes ML W164 OM642 Fuel Pump Diesel Sender Control Unit is a specialized fuel system component designed for OM642 diesel engines in the ML W164 model. This used, original pump from the Fuel pumps and level sensors category ensures proper diesel fuel supply to the engine, supporting stable engine operation. It is a solution for users looking for a proven Mercedes part at a reasonable price, while maintaining factory performance characteristics.

Specifications and technical data

• SKU: A1644700394
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644700394
• Substitutable numbers: A1644700394, A 164 470 03 94
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The fuel pump in the OM642 diesel engine is responsible for precisely delivering diesel fuel to the injection system at the correct pressure and with a stable flow. In the Mercedes ML W164 vehicle, it is a key component for:

• maintaining smooth engine operation under various loads,
• proper starting of the diesel engine in diverse temperature conditions,
• ensuring the correct fuel dosage for the engine control system.

By using a dedicated pump for the specific OM642 engine configuration, the risk of compatibility issues and incorrect supply characteristics is minimized.

Benefits of using an original Mercedes pump

Choosing a fuel pump from the Mercedes offer allows you to maintain the factory parameters of the fuel system. An original component from the same design group as the one installed on the production line means:

• proper fitment to the mounts and fuel lines in the Mercedes ML W164,
• compliance with the operating characteristics of the OM642 diesel engine,
• no need for modifications to the fuel or electrical installation.

A used fuel pump is a solution that allows you to reduce repair costs while maintaining the factory design of the fuel system. For many users, it is a reasonable compromise between price and quality, especially in the case of specialized components for diesel units.

Operating characteristics in a Diesel engine

Diesel engines are particularly sensitive to the quality and stability of the fuel supply. The fuel pump designed for the diesel system in the Mercedes ML W164 OM642 has been engineered to:

• maintain appropriate diesel flow parameters across the full RPM range,
• work with the engine control system that monitors fuel pressure and dosage,
• ensure consistent supply during long-term operation in road and highway conditions.

As a result, the injection system can operate under stable conditions, which promotes engine refinement and reduces the risk of supply disruptions.

Condition, installation, and practical tips

The offered fuel pump is an aftermarket component, which allows for an economical repair of the fuel system in the Mercedes ML W164. Before installation, it is recommended to:

• verify compatibility with the specific OM642 engine version in your vehicle,
• check the tightness of fuel lines and the condition of the fuel filter,
• perform the installation at a specialized service center with experience in working with diesel units.

This approach increases the chance of trouble-free operation after replacement and reduces the risk of secondary faults resulting from improper installation.

Technical support and parts selection

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

When choosing used fuel system components, it is worth paying attention to the general principles of selecting electronics and elements that work with the engine control system. Practical tips on assessing the condition and fitment of subassemblies can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Additionally, if you are considering whether a new or used part is a better solution in your case, comparing the costs and durability described in the material New or used? A comparison of costs and quality of car parts may be helpful, which will facilitate making an informed purchasing decision.