Audi A4 B8 Fuel Line Fuel Feed Return Pipe Hose 2.0 TDI Diesel 8K0201541AA

Audi A4 B8 Fuel Line Fuel Feed Return Pipe Hose 2.0 TDI Diesel is an original fuel system component designed for diesel engines, specifically engineered for Audi models. Thanks to its factory-spec geometry and precise fit for 2.0 TDI units, it ensures stable fuel delivery and safe operation of the entire injection system. This is the ideal solution for users who expect a reliable, proven component rather than random aftermarket replacements.

Specifications and technical data

• SKU: 8K0201541AA
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0201541AA
• Substitutable numbers: 8K0201541AA, 8K0 201 541 AA
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The presented line belongs to the Lines, hoses, and pipes category and is responsible for transporting diesel fuel between components of the fuel system in Audi diesel engines. A correctly selected fuel hose reduces the risk of leaks, pressure drops, and starting issues, which directly impacts the performance of the 2.0 TDI unit.

Proper routing of the fuel line is particularly important in modern diesel engines, where the injection system operates under high pressure. The correct diameter, shape, and mounting points ensure:

• stable fuel flow to the fuel rail and injectors,
• reduced mechanical stress on the connections,
• reduction of vibrations and tension during engine operation.

Benefits of using an original Audi fuel line

The original Audi fuel line has been designed for a specific powertrain, allowing for the maintenance of factory operating parameters. In practice, this means:

• precise fit to the fuel system – no need for modifications, custom mounts, or trimming the line,
• preservation of the manufacturer-intended hose routing,
• compatibility with factory quick-connectors and mounting brackets.

For the user, this means easier installation, a lower risk of service errors, and predictable vehicle behavior after repair. In the case of diesel systems, where fuel quality is crucial for the longevity of injectors and the pump, using an original line is a technically sound solution.

Component condition and service application

The fuel line comes from vehicle dismantling and is offered as a used part, allowing for economical repair while maintaining a component of factory origin. Such parts are often chosen in cases of:

• mechanical damage to the line (cracks, abrasions, deformations),
• detected leaks in the area of the connectors,
• modernization or engine swap within the same engine family.

Replacing the fuel line is recommended whenever there are signs of leakage, a smell of fuel in the engine bay, or problems maintaining system pressure. Using an original component helps restore correct operating parameters without the need to experiment with unreliable replacements.

Why choose dedicated Audi fuel lines

In diesel systems, every element of the fuel circuit is significant for reliability and safety. A dedicated line for the Audi A4 B8 with a diesel engine ensures:

• compliance with the pressure requirements of the injection system,
• resistance to diesel fuel and typical operating temperatures,
• maintenance of the factory fuel system configuration.

For workshops and individual users, this means predictable installation and a reduction in the risk of complaints related to leaks or incorrect hose routing. This is especially important when servicing vehicles used intensively, where stability and the repeatability of the repair result are what count.

Expanding the Audi fuel system – selecting related components

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

For larger service tasks related to the drivetrain, it is also worth ensuring the efficiency of the transmission system. Practical tips regarding the operation and purchase of used gearboxes – manual, automatic, and DSG – can be found in the article Gearbox: manual, automatic, or DSG – common faults and a guide to buying a used gearbox, which will help you better plan comprehensive vehicle maintenance.