Audi RS4 B8 S5 8T Oil Filler Pipe Hose Line 4.2 FSI Petrol 079115278AB

Audi RS4 B8 S5 8T Oil Filler Pipe Hose Line 4.2 FSI Petrol is an original component from the Lines, Hoses and Pipes group, designed for the lubrication system in 4.2 FSI petrol engines. It ensures tight and stable oil routing during refills, which is essential for trouble-free maintenance and the durability of the power unit.

Specifications and technical data

• SKU: 079115278AB
• Mark: Audi
• Condition: Used
• OEM Part Number: 079115278AB
• Substitutable numbers: 079115278AB, 079 115 278 AB
• Fuel type: Petrol
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the lubrication system

The oil filler pipe in Audi RS4 B8 and S5 8T models with the 4.2 FSI engine is responsible for safely guiding engine oil from the filler cap into the engine unit. A correctly selected component minimizes the risk of leaks during top-ups, facilitates maintenance, and reduces engine bay contamination. In the case of FSI petrol units operating under high loads, a stable and sealed oil filler path is important both for daily use and more intensive driving. Using an original pipe allows for maintaining the factory oil routing geometry and compatibility with other system components.

Construction and fitment for Audi RS4 B8 / S5 8T

The pipe has been designed specifically for the architecture of the V8 4.2 FSI engine bay, taking into account the layout of accessories and covers. The properly selected shape and mounting points ensure:

• secure routing along the power unit,
• proper positioning of the filler cap relative to covers and shrouds,
• easy access when adding oil, without interference with other components. As a result, installation is predictable, and once installed, the pipe works with factory brackets and fasteners, which reduces vibrations and stress during engine operation.

Characteristics of the used component

The offered oil filler pipe is a used component, sourced from disassembly. Such a part, provided it remains sealed and free of mechanical damage, retains its functional properties, as it is not a consumable item to the same extent as, for example, filters or seals. In practice, this allows for an economical replacement of a damaged pipe while maintaining the manufacturer's original specifications. Choosing an original used component is often preferred by RS and S model owners who want to maintain the vehicle's structural integrity, avoiding fitment issues that may occur with aftermarket replacements of imprecise dimensions.

Benefits of using the original oil filler pipe

Using a dedicated oil filler pipe in a 4.2 FSI petrol engine provides a number of practical benefits:

• Factory fitment – maintaining the original oil routing geometry and compatibility with engine accessories.
• Stable operation at high temperatures – construction designed for the conditions prevailing in the engine bay of FSI units.
• Easier maintenance – convenient access to the oil filler cap and reduced risk of spilling during top-ups.
• Consistency with the rest of the system – no need to modify other lines, hoses, or covers.

Complementary items from the Audi Lines, Hoses and Pipes group

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as breather lines, cooling system hoses, or vent pipes, check the available parts in the Audi Lines, Hoses and Pipes category.

Additional technical and operational information

Before installing the oil filler pipe, it is worth verifying compatibility with the specific petrol engine version and vehicle model year using the manufacturer's catalog data. It is also recommended to check the condition of the seals working with the pipe and the correctness of the mounting at factory points. For users interested in broader vehicle modernization – including improving driver ergonomics – guide materials such as the article Personalization and ergonomics – when is it worth replacing the steering wheel with a premium model? may be helpful, as it discusses the approach to cockpit changes while maintaining functionality and safety.