Audi A4 S4 Avant Quattro 8E EGR Exhaust Vacuum Hose Set 2.0 TDi 03G131552S

Audi A4 S4 Avant Quattro 8E EGR Exhaust Vacuum Hose Set 2.0 TDi is an original vacuum system component designed to work with the exhaust gas recirculation system in a diesel engine. The set ensures stable control of the EGR valve and other vacuum components, which translates into predictable engine performance and correct response to load. This solution is dedicated to users who expect consistent EGR system operation and the preservation of factory control parameters.

Specifications and technical data

• SKU: 03G131552S
• Mark: Audi
• Condition: Used
• OEM Part Number: 03G131552S
• Substitutable numbers: 03G131552S, 03G 131 552 S
• Category: Other Car Parts & Accessories

Purpose and function in the EGR system

The vacuum hose set in the Audi A4 and S4 Avant Quattro 8E with a 2.0 TDi engine is responsible for transmitting vacuum between the control elements and the EGR valve as well as other vacuum-operated components. Properly selected diameters and shapes of the hoses allow for maintaining the appropriate level of vacuum throughout the circuit, which is crucial for:

• stable opening and closing of the EGR valve,
• correct system response to changes in engine load,
• maintaining proper combustion and exhaust emission parameters.

By maintaining the factory geometry of the hoses, the EGR control system operates in a predictable manner, and the engine control unit receives conditions similar to those intended by the manufacturer.

Set construction and installation aspects

The EGR vacuum hose set has been designed as a complete set of components that work together in the engine bay of the Audi A4 S4 Avant Quattro 8E. Properly formed hose sections facilitate routing in tight spaces, minimizing the risk of kinks and leaks. This solution allows for:

• organized hose routing along factory paths,
• reduction of vibrations and rubbing against adjacent components,
• easier diagnostics of potential leaks in the future.

With proper installation, the set allows for maintaining a clear hose layout, which is beneficial for both service and subsequent inspections.

Benefits of using the original set

In the case of vacuum systems in TDi engines, it is particularly important to maintain the tightness and proper flexibility of the hoses. Using a dedicated EGR vacuum hose set in an Audi allows you to:

• reduce the risk of vacuum drops that cause controller errors,
• limit problems with unstable EGR valve operation,
• maintain predictable engine performance parameters across a wide range of loads.

For users who want to restore the correct operation of the exhaust gas recirculation system, such a set is a practical service solution that allows avoiding experiments with random hoses of inappropriate parameters.

Product characteristics and condition

The offered EGR vacuum hose set comes from an Audi vehicle and is part of the group of original components used factory-fitted in A4 and S4 Avant Quattro 8E models with a 2.0 TDi engine. The product is defined as used, which in practice means it has already been in service in a vehicle, but can still perform its function after proper installation. This type of solution is often chosen as an economical alternative to new sets, especially for vehicles used on a daily basis.

Before installation, it is recommended to perform a standard leak test and a visual inspection of the hoses to ensure that the vacuum installation will operate in a manner consistent with the requirements of the EGR system.

Expanding knowledge and selecting components

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 vacuum lines, connectors, or small fittings, check out the available parts in the Other Audi category.

For users interested in the structural differences between sports versions and standard models of the brand, it is worth reading the material describing the characteristics of engines, brakes, and chassis – detailed information can be found in the article Audi RS vs other models – what is hidden under the hood and chassis?.

If you want to better understand the role of exhaust gas recirculation in modern diesel engines and consciously approach the choice of used components, the guide EGR: what it is and why it is worth considering used EGR valves, which discusses the principles of system operation and practical aspects of its servicing, will be helpful.