Fuel Feed Lines Mercedes W204 Diesel OM651 Injection Rail Line Pipe A6510706381

Mercedes W204 Diesel OM651 Fuel Lines A6510706381 are original lines designed for OM651 diesel engines in the W204 C-Class models. This component ensures stable fuel supply to the injection system, maintaining proper fuel flow parameters and supporting the reliable operation of the engine unit.

Specifications and technical data

• SKU: A6510706381-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510706381
• Substitutable numbers: A6510706381, A6510783081, A 651 078 30 81, A6510701730, A 651 070 17 30, A6510782781, A 651 078 27 81, A6510782981, A6510700027
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Additional Fuel Injection Parts

Purpose and Function in the Injection System

Fuel lines in the OM651 engine are responsible for the precise delivery of diesel fuel from the supply system to the injection components. A correctly selected set of lines minimizes the risk of pressure drops, leaks, and starting problems, which directly impacts the engine's running smoothness and fuel consumption.

Their location at the front of the vehicle facilitates easier diagnostics and servicing, and the use of a component dedicated to diesel engines ensures compliance with the manufacturer's original specifications.

Compatibility and Replacement Numbers

The offered set of fuel lines is designed as part of the Other Injection System Parts group for Mercedes vehicles with the OM651 unit. The part has an assigned OEM number and a set of replacement numbers, which simplifies the selection of the correct component during repair or upgrade of the fuel system.

Thanks to the presence of reference numbers, it is possible to match the lines to various variants of the OM651 engine used in the W204, while maintaining compliance with the manufacturer's factory specifications.

Technical Characteristics and Installation

The fuel lines have been constructed for operation in the high-pressure system typical of modern diesel engines. The appropriate geometry and routing of the lines in the engine bay reduce the risk of chafing, vibrations, and incorrect positioning relative to other components.

In practice, installation involves recreating the original routing of the lines at the front of the vehicle, maintaining the correct connection sequence. The use of an original solution allows for maintaining system tightness and correct operating pressure, which is crucial for the durability of the injectors and the high-pressure pump.

Part Condition and Application in Repairs

This component is a used part from a dismantled vehicle, making it an attractive cost-effective alternative to new components while retaining the manufacturer's original design. In many cases, using such a component allows for an economical repair of the injection system without compromising on factory fitment.

If you are considering whether a refurbished or used part would be a better choice, it is worth familiarizing yourself with the practical advice contained in the article Refurbished or Used Original – Which Part to Choose for Repairs?, which discusses the differences in durability, cost-effectiveness, and risks associated with both options.

Expanding the Injection System in a Mercedes

If you are planning a comprehensive repair or upgrade of the injection system area in your Mercedes and need other parts from the same group, such as supply lines, return lines, or additional sections connecting the rail to the injectors, check the available parts in the Other Mercedes Injection System Parts category.

Selecting components from the same functional group helps maintain the technical consistency of the entire system, reduces the risk of leaks, and facilitates later diagnostics of potential faults.