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

Audi A5 8T 2.0 TDI Diesel Fuel Return Line is an original part from the Hoses, Pipes, and Tubes group, designed for the diesel engine fuel supply system. A used component allows for an economical yet technically correct repair of the fuel circuit in your Audi, maintaining the factory performance characteristics of the powertrain.

Specifications and technical data

• SKU: 04L130235K
• 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 return line in a Diesel engine is responsible for the controlled return of excess fuel from the injectors to the fuel supply system. It stabilizes working pressure, limits local fuel overheating, and supports the uniform operation of the entire injection system. In the Audi A5 8T 2.0 TDI model, a correctly selected return line directly impacts engine running smoothness, fuel metering precision, and the durability of other system components.

Construction and Fit for Audi A5 8T 2.0 TDI

The offered line belongs to the Hoses, Pipes, and Tubes group, meaning it has been designed for operation in a diesel fuel environment, under varying temperatures and pressure loads. The shape, connection diameters, and branch layout are factory-matched to the architecture of the 2.0 TDI engine in the Audi A5 8T, ensuring installation without the need for modifications or adapters.

Its original Audi origin promotes connection sealing, proper routing of the line within the engine bay, and minimizes the risk of collision with other components. This is particularly important in modern diesel engines where installation space is limited and the fuel system operates under precisely defined conditions.

Benefits of Using an Original Return Line

Using a dedicated return line in the Audi A5 8T 2.0 TDI offers a number of practical technical benefits:

• maintaining proper fuel circulation in the diesel engine's injection system,
• reducing the risk of leaks and pressure drops in the return circuit,
• preserving the factory performance characteristics of the 2.0 TDI engine,
• compatibility with the existing installation without the need for modifications.

A used part allows for a lower repair cost while maintaining compliance with the manufacturer's design solutions. It is a sensible choice when the priority is to restore correct fuel system operation without investing in a complete upgrade.

Application Area and Installation

The fuel return line operates within the engine bay, in close proximity to the injectors and the fuel rail. Its function is to safely discharge excess fuel, making it crucial to maintain proper line routing, bend radii, and mounting points. A correctly selected component reduces stress, prevents chafing, and minimizes the risk of damage from engine vibrations.

Due to its function in a Diesel system, the line must be resistant to contact with diesel fuel and temperature changes within the engine compartment. The original design meets these requirements, translating to predictable component performance over a longer service life.

Additional Information and Part Selection

When selecting a return line for the Audi A5 8T 2.0 TDI, it is advisable to pay attention to compliance with manufacturer markings and fuel type. The product has assigned catalog numbers and interchangeable part numbers, which facilitates verification of compatibility with a specific engine configuration. This allows for precise matching of the part to your vehicle, reducing the risk of ordering errors.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other parts from the same group, such as flexible return sections, branches, or short connectors, check the available parts in the Audi Hoses, Pipes, and Tubes category.

If you are considering whether new or used parts would be a better choice for your situation, an article comparing both solutions in terms of cost and durability might be helpful: Car Parts – New or Used? Comparing Costs, Quality, and Durability.