Audi RS5 4.2 Petrol Fuel Hose Pipe Line 079127503AN

Audi RS5 4.2 Petrol Fuel Hose Pipe Line is an original fuel system component designed for the 4.2 petrol engine in the Audi RS5 model. It ensures precise fuel delivery from the supply side to the power unit, which is crucial for stable engine operation and maintaining factory performance parameters. By using a component from the Audi group, proper geometry, leak-tightness, and resistance to thermal loads typical of high-performance petrol engines are maintained.

Specifications and technical data

• SKU: 079127503AN
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127503AN
• Substitutable numbers: 079127503AN, 079 127 503 AN
• Fuel type: Petrol
• Category: Oil Filters

Purpose and function of the fuel hose

The fuel hose in the Audi RS5 4.2 is responsible for the safe transport of petrol under the appropriate pressure within the fuel supply system. In a high-power engine such as the 4.2, stable fuel supply is particularly important for smooth operation across the entire rev range, both during calm driving and dynamic acceleration.

A properly selected hose:

• maintains the tightness of the fuel system under typical operating conditions of a sports car,
• ensures proper petrol flow to the fuel rail and other system components,
• reduces the risk of fuel pressure drops that could affect engine performance.

Compatibility with the 4.2 petrol engine

The element has been designed for a power unit fueled by petrol, which means it is matched to the characteristic operating parameters of such an engine: temperatures, pressures, and the type of sealing materials used. Unlike universal solutions, a hose dedicated to a specific engine configuration allows for maintaining the factory routing of the fuel system and appropriate distances from hot and moving parts.

This reduces the risk of incorrect installation, chafing, or excessive heating, which is important for both safety and the durability of the entire system.

Characteristics of the used product

The offered fuel hose is a used part, sourced from dismantling. Such components are frequently chosen for servicing sports cars when the goal is to maintain the original manufacturer's specification while optimizing costs. In the case of fuel hoses, it is particularly important that the element retains proper rigidity, shows no signs of excessive mechanical wear, and is free from damage affecting its tightness.

Choosing an original used part allows you to avoid problems typical of aftermarket replacements of uncertain origin, such as inaccurate fitment or different material characteristics.

Service and upgrade applications

The fuel hose for the Audi RS5 4.2 is suitable both for standard replacement of a damaged part and for more extensive service work within the fuel supply system. It can be used, among others, for:

• repairs following leaks or mechanical damage to the lines,
• fuel system inspections after engine modifications,
• restoring the car to a configuration close to factory specifications after previous alterations.

If you are planning broader upgrade work on VAG group cars and want to use parts from dismantling, it is worth checking out our guide on retrofitting: how to reasonably use used parts for retrofitting in VAG and BMW vehicles.

Technical support and related content

When working on the fuel system and engine, it is also worth remembering the condition of other components, such as the cooling or lubrication systems. Long-term, intensive operation of high-power petrol units requires regular monitoring of engine operating temperature and the condition of oil coolers. You can find more on this topic in the article: how the cooling system and oil coolers affect engine longevity.

If you are gathering service parts for your car, you can also check other products in the Oil filters category to plan comprehensive maintenance of the power unit in one go.