Audi RS4 B7 Fuel Pipe Hose Line Center 4.2 FSI BNS 079127503H

Audi RS4 B7 Fuel Pipe Hose Line Center 4.2 FSI BNS is an original fuel system component, belonging to the Lines, hoses and pipes group, designed for use in the high-performance 4.2 FSI BNS engine. Its precise geometry and factory flow characteristics ensure that the pipe stabilizes fuel delivery in the central section of the system, supporting proper engine operation under high loads. This solution is dedicated to users who want to maintain the structural integrity of the fuel system according to the manufacturer's specifications.

Specifications and technical data

• SKU: 079127503H
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127503H
• Substitutable numbers: 079127503H, 079 127 503 H
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Technical characteristics and role in the fuel system

The central fuel pipe in the Audi RS4 B7 4.2 FSI BNS is responsible for the safe and stable transport of the medium between the various components of the fuel supply system. The design of the pipe is adapted to the operating pressures typical for FSI engines, which reduces the risk of leaks and unwanted pressure drops. A properly selected internal diameter and the shape of the pipe run help maintain an even fuel flow, which is important for both performance and the smooth operation of the engine. As an original Audi part, the pipe has been designed taking into account the temperature requirements of the engine bay and the vibrations generated by the 4.2 FSI unit. As a result, it maintains dimensional stability and tightness under typical operating conditions of a sports car.

Compatibility, fitment and installation

The pipe has been developed specifically for the fuel system of the Audi RS4 B7 with the 4.2 FSI BNS engine, which translates into an excellent fit with factory mounts and connectors. The appropriate length, shape, and terminal placement speed up installation and reduce the need for additional modifications. For a mechanic, this means predictable working time, and for the user – a lower risk of installation errors. The element from this group is particularly important during work related to replacing fuel system components, upgrading the engine, or restoring the car to a factory-like state after previous modifications. The factory fitment of the pipe makes it easier to maintain the consistency of the entire fuel supply system.

Benefits of using an original fuel pipe

Using an original central fuel pipe in the Audi RS4 B7 4.2 FSI BNS allows you to maintain fuel system operating parameters consistent with the manufacturer's requirements. This is especially important in high-revving engines, where fuel pressure stability affects throttle response and performance repeatability. The proper design of the pipe also helps to reduce the risk of micro-leaks that could lead to power loss or starting problems. The used condition of this item is a good choice for users looking for a compromise between repair costs and maintaining the original fuel system specification. A properly selected pipe from this group can be an effective solution for maintenance repairs or restoring the car to its stock configuration.

Product group and system expansion

The pipe belongs to the Lines, hoses and pipes group, which are components responsible for transporting working media in the vehicle – in this case, fuel. Replacing the central section of the fuel pipe often goes hand in hand with checking other parts of the installation, which helps reduce the risk of future leaks or performance drops. 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 flexible hose sections, rigid pipes, or connectors, check the available parts in the Audi lines, hoses and pipes category.

Maintaining the character of the Audi RS4

The selection of appropriate fuel system components has a direct impact on maintaining the character of the 4.2 FSI BNS engine – its response to load, operational stability, and predictable behavior during dynamic driving. This is why many users choose original Audi components, even in used condition, to maintain consistency with the vehicle's factory concept. If you want to better understand how choosing the right parts influences the DNA of this brand, it is worth reading the article: Audi and pure emotion – how used parts help maintain the brand's DNA.