Audi A4 B8 A5 8T Fuel Line Pipe Return Overflow Hose 2.0 TDI Diesel 04L130235K

Audi A4 B8 A5 8T Fuel Line Pipe Return Overflow Hose 2.0 TDI Diesel is an original fuel system component designed for diesel engines, responsible for the safe return of excess fuel from the injectors. Thanks to its precise construction and fitment to the specifics of TDI units, it ensures stable operation of the injection system and helps maintain consistent fuel pressure. This is a practical solution for users looking for a proven overflow hose for their Audi.

Specifications and technical data

• SKU: 04L130235K-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L130235K
• Substitutable numbers: 04L130235K, 04L 130 235 K
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel overflow hose in a diesel engine is responsible for draining excess diesel fuel from the injectors back into the system, which stabilizes the operating parameters of the entire setup. In 2.0 TDI units, using a properly selected hose is important for:

• maintaining proper pressure in the common rail,
• reducing the risk of air entering the system,
• correct operation of injectors under variable loads,
• even fuel supply to the engine.

A properly selected element from the Lines, hoses, and pipes category allows for maintaining the factory operating parameters of the fuel system and reduces the risk of leaks.

Compatibility with 2.0 TDI Diesel units

The presented overflow hose has been designed for use in Audi A4 B8 and Audi A5 8T models with diesel engines. The design, adapted to the architecture of the 2.0 TDI unit, facilitates installation at original mounting points and compatibility with factory injectors. As a result, the user receives a component that:

• is compatible with the diesel fuel system used in these models,
• allows for maintaining the original routing of lines in the engine bay,
• minimizes the need for modifications to the fuel installation.

Such fitment translates into stable engine operation and predictable performance of the power unit in daily use.

Component characteristics and benefits of use

As an original Audi component, the fuel overflow hose is made of materials adapted to work with diesel fuel and the conditions prevailing in the engine bay. In practice, this means:

• resistance to diesel fuel and typical operating temperatures,
• maintaining flexibility during operation,
• the ability to work in a system subjected to cyclical pressure changes.

Using this component allows for an economical repair of the fuel system while maintaining the manufacturer's original specifications. This is a beneficial solution for drivers who want to restore the correct operation of the injection system without compromising on the factory standard of workmanship.

Practical installation and operating tips

When replacing the fuel overflow hose in a diesel engine, it is worth paying attention to the condition of other fuel system components, such as other flexible lines or quick-connectors. It is recommended to:

• check for leaks after installation on both a cold and a warmed-up engine,
• ensure that the hose is not under tension or twisted,
• use appropriate clamps or mounting clips consistent with the factory solution.

Such an approach helps reduce the risk of fuel leaks and ensures safe and predictable system operation in the long term.

Expanding the Audi fuel system

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

For drivers who are also thinking about improving driving comfort and cabin aesthetics, practical advice on choosing interior equipment components from the secondary market may be useful – you can find them in the article Premium interior for half the price: second-hand seats, steering wheels, and multimedia.