Audi R8 4.2 FSI Secondary Air Valve Pipe Hose Line 079131605AC

The Audi R8 Secondary Air Injection Valve Hose, Pipe, Tube 4.2 FSI is an original air supply system component designed for 4.2 FSI gasoline engines in the Audi R8 model. It ensures proper routing of the secondary air stream, supporting stable engine operation and correct exhaust emission system functionality.

Specifications and technical data

• SKU: 079131605AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 079131605AC
• Substitutable numbers: 079131605AC, 079 131 605 AC
• Fuel type: Petrol
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and Function in the Secondary Air System

The Audi R8 4.2 FSI Secondary Air Injection Valve Hose operates within the intake system and the secondary air injection system. Its function is to direct the appropriate amount of air to the exhaust system during engine start-up and warm-up phases, which aids in exhaust gas afterburning and stabilizes cold engine operation.

A properly selected and sealed hose in this area influences:

• maintaining the correct air-fuel mixture during critical phases of gasoline engine operation,
• efficient operation of the exhaust emission system and reducing the risk of stored diagnostic trouble codes,
• smooth operation of the 4.2 FSI unit during start-up and the first few minutes of driving.

Construction and Fitment for Audi R8 4.2 FSI

This part belongs to the category of hoses, pipes, and tubes, meaning it is designed for resistance to temperature, vibrations, and the conditions found in the engine bay. The shape and diameter of the hose are adapted to the factory spigots and mounting points in the Audi R8 with the 4.2 FSI engine, facilitating installation and maintaining the original routing of the system.

Original Audi origin promotes:

• precise fitment with other system components,
• maintaining the factory airflow geometry,
• compatibility with the stock secondary air injection valve and gasoline engine ancillaries.

Performance Characteristics and Benefits of Use

For high-performance gasoline engines like the 4.2 FSI in the Audi R8, the integrity and unobstructed flow of secondary air hoses are crucial for both performance and diagnostic system operation. Using an original hose helps reduce the risk of:

• intake system leaks leading to incorrect sensor readings,
• secondary air system-related fault codes and the check engine light on the dashboard,
• accelerated wear of cooperating components resulting from improper airflow.

This solution is particularly beneficial for owners who wish to maintain the original engine operating characteristics and consistency with the official Audi service documentation.

Item Condition and Service Application

This hose is a used part, making it an attractive option for repairs and servicing of high-performance gasoline engines where a combination of original origin and reasonable cost is a priority. This type of component is well-suited for:

• restoring the completeness of the secondary air system after previous modifications or disassembly,
• repairs following a secondary air injection valve failure, where hose replacement is also necessary,
• preventative maintenance when wear or hardening of the hose material is suspected.

Other Audi Hoses, Pipes, and Tubes

If you are also looking for other items in the Audi hoses, pipes, and tubes category, check out the Audi hoses, pipes, and tubes available in our assortment to select components that match other systems in your car.

For a comprehensive approach to servicing systems that cooperate with the powertrain, it is also worth consulting our guide on cooling system operation at high temperatures – you can find it here: Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings. This will help you better plan the maintenance of your car's entire powertrain.