Mercedes W169 W245 High Pressure Injection Fuel Rail Diesel OM640 A6400702095

Mercedes W169 W245 High Pressure Injection Fuel Rail Diesel OM640 is a precision fuel system component designed for Mercedes diesel engines. It enables stable fuel distribution to the injectors, which translates into smooth engine operation and correct combustion characteristics. Thanks to its factory origin from the Mercedes brand, it maintains proper fuel flow parameters and mounting fitment.

Specifications and technical data

• SKU: A6400702095-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400702095
• Substitutable numbers: A6400702095, A 640 070 20 95, A 640 070 12 95, A6400701295, A 640 070 23 95, A6400702395
• Fuel type: Diesel
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function of the fuel rail

The fuel rail in a Diesel engine plays a key role in distributing high-pressure fuel to individual cylinders. The appropriate geometry of the channels and the tightness of the connections allow for maintaining stable operating pressure, which is essential for correct fuel dosing by the injectors. In OM640 units, using the correct fuel rail reduces the risk of rough engine operation, power loss, or cold start issues.

Benefits of using an original Mercedes fuel rail

Using a fuel rail from the Mercedes fuel system ensures:

• proper fitment to mounts and lines in the OM640 engine,
• preservation of factory fuel flow characteristics,
• consistency with other common rail system components,
• reduction of the risk of leaks and uncontrolled pressure drops. A component from this group, even in used condition, allows for an economical repair of the fuel system while maintaining compliance with the manufacturer's solutions.

Used condition and assembly aspects

The offered fuel rail is in used condition, which allows for lower repair costs compared to new components, while maintaining the functionality required for daily operation. Before installation, a standard visual inspection for mechanical damage and checking the fuel line connection ports is recommended. A correctly selected fuel rail for a specific version of the OM640 engine facilitates installation and minimizes vehicle downtime.

Application in the lines, hoses, and pipes system

The fuel rail works directly with components from the Lines, hoses, and pipes group, responsible for delivering fuel from the high-pressure pump and returning excess fuel back to the system. Proper matching of the connectors and fittings with the fuel lines is crucial for maintaining the tightness of the entire system. Replacing the fuel rail often goes hand in hand with checking the condition of the lines, which helps to limit subsequent leaks and pressure problems in the rail.

Recommendations for selection and purchase

When choosing a fuel rail for a Mercedes with a diesel engine, it is worth paying attention to compatibility with the engine unit and the presence of appropriate part numbers and replacement numbers in the technical specification. Data such as SKU, OEM part number, replacement numbers, brand, condition, and fuel type are available in the specification section (marked accordingly with attributes SKU, OEM part number, Replacement numbers, Brand, Condition, Fuel type) and allow for verifying compatibility with a specific vehicle. If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as supply lines, return lines, or high-pressure pipes, check the available parts in the Mercedes lines, hoses, and pipes category. When selecting used fuel system components, such as fuel rails, it is also worth familiarizing yourself with practical tips regarding the assessment of their condition and operational safety – the following article may be helpful: Fuel dosing problems – how to safely choose a used injection pump and fuel rail.