Audi A5 S5 8T 4.2 V8 FSI CAUA Petrol Fuel Pipe Hose Line 079127509AQ

Audi A5 S5 8T 4.2 V8 FSI CAUA Petrol Fuel Pipe Hose Line is an original component from the Pipes, hoses and tubes group, designed for the fuel supply system of a petrol engine. It ensures stable fuel delivery, which directly impacts the engine's performance and the vehicle's operational safety.

Specifications and technical data

• SKU: 079127509AQ
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127509AQ
• Substitutable numbers: 079127509AQ, 079 127 509 AQ
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel pipe is dedicated to the 4.2 V8 FSI CAUA engine in Audi A5 / S5 8T generation models running on petrol. It is responsible for precisely delivering fuel at the correct pressure to the injection system components, minimizing the risk of performance drops, leaks, or engine malfunctions.

The original design of the pipe guarantees a proper fit to factory mounts, routing, and engine bay geometry, which facilitates installation and reduces material stress during engine operation.

Construction and fitment for Audi A5 / S5 8T

The component was designed by the Audi brand with the specific requirements of the V8 FSI engine in mind. The shape, connection diameters, and connector placement comply with factory specifications, allowing for the maintenance of the original pipe routing in the engine bay.

As a result, the pipe works with other fuel system components without the need for modifications, and the risk of collision with other elements (engine accessories, wiring harnesses, covers) is reduced. Such fitment helps maintain stable fuel system parameters, especially in high-power engines subject to thermal load.

Performance characteristics and benefits of use

As an original part, the fuel pipe ensures consistency with the factory fuel system design. In practice, this translates into:

• correct fuel pressure and flow across the entire engine RPM range,
• reduced risk of leaks thanks to matched connectors and seals,
• stable operation of the V8 FSI unit during dynamic driving,
• easier diagnostics and future service due to the preservation of the original configuration.

Used condition allows you to combine the functionality of an original component with a more favorable purchase cost, which is particularly important during comprehensive repairs or restoration of an Audi A5 / S5 class vehicle.

Why choose a used Audi fuel pipe

Choosing a used fuel pipe from original Audi production is a solution that combines economic aspects with technical installation correctness. The element retains its factory geometry and compatibility with the petrol system, while simultaneously allowing for cost savings compared to a new part.

If you want to better understand the benefits of installing used components in your car, it is worth checking out our guide: Eco-driving: discover the benefits of used car parts. You will find arguments there in favor of making an informed choice of second-hand parts, both from a financial and environmental perspective.

Expanding the fuel system in your Audi

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 additional pipes, flexible hoses, or rigid supply tubes, check the available parts in the Audi pipes, hoses and tubes category.