Mercedes X164 Fuel Rail Pipe Hose Line Tube OM629 A6290701495

Mercedes X164 Fuel Rail Pipe Hose Line Tube is a specialized component of the diesel engine fuel supply system, designed for the precise transport of diesel fuel within the power unit. Its original Mercedes origin ensures a proper fit for the fuel injection system and stable operating parameters under demanding service conditions. This is a solution for users who expect proven, factory-spec pipe geometry and reliable installation in a Diesel engine.

Specifications and technical data

• SKU: A6290701495-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290701495
• Substitutable numbers: A6290701495, A 629 070 14 95, 1021500421
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel rail with the fuel pipe in the OM629 engine is responsible for the controlled flow of fuel between the components of the injection system. A properly selected pipe:

• maintains the tightness of the supply system at high operating pressure,
• ensures stable diesel fuel supply to the injectors,
• minimizes the risk of pressure drops and disturbances in the power unit's operation,
• is structurally adapted for installation in the Mercedes X164 engine compartment.

As a result, the injection system maintains proper operating parameters, which translates into smooth engine performance, the correct fuel dosage, and predictable behavior of the power unit across the full load range.

Benefits of using an original fuel pipe

Using an original fuel rail with a fuel pipe in a diesel engine provides a number of practical service and operational benefits:

• Factory geometric fit – proper routing of the pipe relative to the cylinder head, accessories, and other fuel system components.
• Appropriate material characteristics – the pipe is designed for operation with diesel fuel, under varying temperatures and loads.
• Stability of flow parameters – maintaining the internal diameter and working cross-section specified by the manufacturer.
• Hassle-free installation – mounting points and shape consistent with the factory installation in the Mercedes X164 with the OM629 engine.

For workshops and users, this means shorter installation time, reduced risk of leaks, and predictable behavior of the injection system after repair.

Technical characteristics in the context of a Diesel engine

The supply system in diesel units requires components resistant to high pressures and pulsations generated by the pump and injectors. The described fuel pipe is adapted for operation in a Diesel engine, which means:

• resistance to long-term contact with diesel fuel,
• designed rigidity and flexibility in areas requiring vibration compensation,
• compatibility with the factory OM629 injection equipment.

A component configured in this way allows for maintaining the proper operating conditions of the fuel system, which is important for both the durability of the injectors and the overall reliability of the power unit.

Service application and part selection

The fuel rail with the fuel pipe for the Mercedes X164 is suitable for:

• injection system repairs after detecting pipe leaks,
• preventive maintenance in vehicles with higher mileage,
• restoring the factory fuel system configuration after previous modifications.

For proper part selection, it is worth paying attention to manufacturer markings, catalog numbers, and compatibility with the specific OM629 engine version. Proper matching translates into trouble-free installation and the preservation of the factory operating parameters of the supply system.

Component condition and practical aspects

The offered fuel pipe comes from the Lines, hoses, and tubes group and is a used component, which in practice means an attractive cost-to-functionality ratio while maintaining the original manufacturer's specifications. This is a particularly beneficial solution for comprehensive injection system repairs, where both quality and service economy are important.

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 supply lines, return hoses, or high-pressure tubes, check the available parts in the Mercedes Lines, hoses, and tubes category.

If you want to better plan your repairs and learn which used original components are most frequently chosen by drivers and workshops, it is worth checking out our guide: The best used car parts – a guide to the most frequently chosen original parts.