Mercedes W204 W212 W639 W906 OM651 Fuel Pressure Sensor A6510703981

Mercedes W204 W212 W639 W906 OM651 Fuel Pressure Sensor is a precise component of the diesel engine fuel system, designed by Mercedes for stable engine operation. It is responsible for accurate measurement of pressure in the diesel fuel system, which translates to correct fuel delivery, smooth engine running, and predictable performance. This solution is dedicated to users who want to maintain the factory operating parameters of the OM651 unit in their W204, W212, W639, and W906 models.

Specifications and technical data

• SKU: A6510703981-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510703981
• Substitutable numbers: A6510703981, A 651 070 39 81, A0045421618, A 004 542 16 18
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Role in the Fuel System

The fuel pressure sensor in the OM651 diesel engine is responsible for continuous monitoring of the fuel rail pressure and transmitting this data to the engine control unit. This enables:

• precise fuel delivery across the entire RPM range,
• stable idle and under load operation,
• reduced risk of power loss due to incorrect pressure readings,
• decreased probability of injection system-related errors.

In Mercedes C-Class, E-Class, Vito/Viano, and Sprinter vehicles with the OM651 unit, a properly functioning fuel pressure sensor is crucial for maintaining engine smoothness and correct interaction with the diesel injection system.

Benefits of Using an Original Mercedes Sensor

Using an original Mercedes fuel pressure sensor allows for maintaining fuel system operating parameters in line with the manufacturer's specifications. In practice, this means:

• reliable pressure readings, matched to the OM651 engine control unit's characteristics,
• better operational consistency under various load and temperature conditions,
• maintained compatibility with the factory electrical and mechanical installation.

For users who want to avoid issues with aftermarket part adaptation, choosing a component from the Hoses, Pipes, and Tubes group from the Mercedes offering is a safe and technically sound solution.

Technical Characteristics in the Context of a Diesel Engine

Engines powered by Diesel fuel operate under high pressure in the injection system, therefore the sensor must provide a stable signal across a wide range of values. In practice, this translates to:

• correct response to sudden load changes,
• better control over the injection process at low and high RPMs,
• reduced risk of the unit entering limp-home mode due to incorrect pressure readings.

In Mercedes commercial and passenger vehicles, where the OM651 engine often operates under demanding conditions, a functional fuel pressure sensor helps maintain stable operating parameters.

Condition, Fitment, and Service Application

The offered component is in used condition, making it an attractive solution for users seeking a technically sound component within a reasonable budget. It is a practical choice for diagnosing fuel system faults, such as starting problems, power loss, or appearing control unit errors related to fuel pressure.

Replacing the fuel pressure sensor is a typical service operation in diesel engines, and using a component dedicated to the OM651 unit in W204, W212, W639, and W906 models facilitates installation and reduces the risk of mechanical or electrical incompatibility.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as fuel lines, flexible hoses, or metal supply pipes, check the available parts in the Mercedes Hoses, Pipes, and Tubes category.