BMW F20 F21 F30 N47N Diesel Fuel Injection Return Line Hose 8507680

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F20 F21 F30 N47N Diesel Fuel Injection Return Line Hose is an original fuel system component designed for BMW F-series diesel engines with the N47N unit. This used hose ensures factory-standard fuel routing, maintaining proper sealing and flow parameters, which translates into stable diesel engine operation and safe vehicle use. It is a solution for users looking for a proven OEM component at a reasonable price.

Specifications and technical data

• SKU: 8507680
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507680
• Substitutable numbers: 13538507680, 8507680
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel hose in this BMW model is responsible for the controlled routing of diesel fuel between fuel system components, minimizing pressure drops and the risk of air entering the system. The design, tailored to the N47N engine, allows for maintaining proper routing paths in the engine bay, which reduces stress, vibrations, and potential chafing during long-term operation.

Thanks to the use of a dedicated hose for the diesel unit, the diesel fuel system maintains proper operating parameters, which promotes even injection, correct starting, and stable operation at idle and under load.

Benefits of using an original fuel hose

Using an original fuel hose in a BMW F-series with an N47N engine allows for compliance with the manufacturer's factory specifications. In practice, this means:

• proper fitment to mounts and routing in the engine bay,
• maintaining the correct hose diameter and geometry,
• reducing the risk of leaks and fuel seepage,
• stable operating conditions for the diesel injection system.

For the user, this translates into safer operation and a lower risk of additional faults resulting from improper fuel routing, such as damage to accessories or electrical components in the engine bay.

Characteristics of the used component

The offered fuel hose is a used part, which, in the case of original BMW components, allows for combining factory fitment with a more favorable purchase cost. Such a component, when used properly, retains its functional properties for a long time, making it an effective alternative to new aftermarket replacements with uncertain specifications.

When choosing a used fuel hose, it is worth paying attention to the condition of the connectors, flexible sections, and the overall tightness of the system after installation. A properly selected and installed component helps maintain stable fuel pressure in the diesel engine and reduces the risk of starting problems or power loss.

Professional installation and operation in a diesel engine

When replacing the fuel hose in an N47N diesel engine, installation by an experienced service center is recommended, following procedures for bleeding the system and checking for leaks after starting the unit. A correctly performed operation minimizes the risk of air entering the system, and thus problems with the operation of the injectors and the high-pressure pump.

Regular inspection of the condition of fuel hoses in diesel units is important from the point of view of safety and protection of other engine accessories. Replacing a worn hose with an original component dedicated to the BMW F20/F30 with an N47N engine helps maintain the integrity of the entire fuel system and reduces the risk of costly repairs in the future.

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other components from the same group, such as flexible supply hoses, rigid guide pipes, or additional fuel return sections, check the available parts in the BMW hoses, pipes and lines category.

For drivers also considering replacing drivetrain components during major fuel system repairs, the guide article Used gearbox – when is it worth it and what you need to remember, which discusses the practical aspects of selecting and using pre-owned components, may be helpful.