BMW F30 F31 F32 F36 Diesel N57 Fuel Hose Injection Rail Return Line 8507688

Description

BMW F30 F31 F32 F36 Diesel N57 Fuel Hose Injection Rail Return Line is a component from the Lines, hoses and pipes group, designed for the fuel supply system of BMW 3 Series F30/F31 generation diesel engines with the N57 unit. It is responsible for the precise delivery of diesel fuel to the injection rail, which is crucial for the stable operation of the common rail system and correct fuel metering.

Specifications and technical data

• SKU: 8507688-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507688
• Substitutable numbers: 8507688, 13538507688
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The described fuel hose is a working component of the fuel supply system in Diesel N57 engines used in the BMW F30 and F31. Its task is to provide a leak-proof and pressure-resistant connection between the injection rail and other system components, ensuring stable fuel pressure across the entire engine load range.

The proper geometry and internal diameter of the hose are matched to the characteristics of the N57 unit, which allows for maintaining adequate fuel flow, reducing pressure drops, and minimizing the risk of injector operation disturbances. As a result, the injection system can maintain correct operating parameters, which translates into engine refinement and combustion efficiency.

Construction and fitment for BMW F30/F31

The hose belongs to the Lines, hoses and pipes group, meaning it has been designed to operate in a high-pressure environment and in contact with diesel fuel. The shape, length, and ends of the hose are adapted to the engine bay layout of the BMW F30/F31, which facilitates installation and allows for proper routing of the hose without tension or twisting.

Appropriately selected working materials ensure resistance to temperature, vibrations, and typical operational loads in a diesel engine. Thanks to this, the hose can operate in the demanding conditions characteristic of N57 units, maintaining the tightness and stability of connections.

Benefits of using an original BMW hose

Using a fuel hose dedicated to the BMW F30/F31 with the N57 engine allows for maintaining the factory operating parameters of the fuel supply system. Proper fitment to the injection rail and other system elements reduces the risk of leaks, pressure drops, or incorrect fuel metering.

The main advantages of using this component include:

• maintaining compliance with the design of the N57 engine injection system,
• stable supply of diesel fuel to the injection rail,
• reducing the risk of fuel leaks in the high-pressure zone,
• easier diagnostics and servicing of the fuel system thanks to the use of a component consistent with the factory design.

Product condition and service application

The fuel hose comes from the BMW range and is a component intended for re-installation in vehicles with the N57 diesel engine. It can be used both when replacing a damaged hose and during broader service work within the injection system, when it is necessary to restore proper tightness and fuel flow.

Selecting the correct hose for a specific engine configuration and F30/F31 body is important from the point of view of safety and the durability of the entire fuel system, therefore it is recommended to verify compatibility with your vehicle before installation.

Expanding your BMW fuel system upgrade

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as supply lines, return hoses, or high-pressure pipes, check out the available parts in the BMW Lines, hoses and pipes category.

If you want to better plan your service work and are interested in how to effectively select used fuel system elements and other components for popular models, our guide may be helpful: The best used car parts – a guide to the most frequently chosen original parts.