Audi RS4 B8 EGR Valve Combi Valve Pipe Line Hose Tube Left N/S CFSA 079131166AC

Audi RS4 B8 EGR Valve Combi Valve Pipe Line Hose Tube Left N/S CFSA is an original exhaust gas recirculation system component designed for precise operation on the left side of the engine unit. Thanks to Audi's factory design, this valve ensures stable exhaust flow parameters and supports proper engine operation under demanding operating conditions. This is a solution for users who are looking for a proven, compatible component instead of random replacements.

Specifications and technical data

• SKU: 079131166AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 079131166AC
• Substitutable numbers: 079131166AC, 079 131 166 AC
• Location on the vehicle: Left
• Category: EGR Parts & Valves

Technical characteristics and intended use

The presented valve belongs to the EGR valves and parts group, responsible for controlled exhaust gas recirculation in the Audi engine. The combination design means that several functions are integrated into one body, which reduces the number of connections and potential leak points. The element was designed specifically for the RS4 B8 generation model, taking into account the high thermal and dynamic loads characteristic of units with a sporty character.

The placement on the left side of the vehicle allows for proper connection to the factory intake and exhaust system, without the need for modifications or adaptations. As a result, the installation process is orderly, and the risk of installation errors is limited.

Benefits of using an original EGR valve

Using an original EGR valve in the Audi RS4 B8 translates into a number of practical operational benefits:

• Stable EGR system operation – a properly selected component supports uniform exhaust gas recirculation and helps maintain correct engine performance parameters.
• Better cooperation with vehicle electronics – the factory solution is designed for specific ECU maps, which reduces the risk of errors and fault messages.
• Proper mechanical fit – correct mounting points and connection geometry facilitate installation and subsequent service.
• Consistency with other system elements – the valve works in harmony with other exhaust gas recirculation components, which promotes long-term, predictable operation.

Condition, origin and practical application

The offered EGR valve is a used item, which makes it an attractive cost-effective alternative to new components, while maintaining the original Audi design. It is a good solution in situations where the existing valve has worn out, is causing ECU errors, or symptoms such as rough engine operation, loss of performance, or exhaust emission problems.

In practice, the installation of this component is recommended in the case of:

• diagnostics confirming the failure of the existing EGR valve,
• comprehensive maintenance of the intake and exhaust system in the RS4 B8,
• repairs after a failure in which the exhaust gas recirculation mechanism has seized or become blocked.

Integration with other Audi EGR system elements

Due to its function, the EGR valve works with exhaust pipes, the manifold, the exhaust gas cooler, and the engine control unit. Proper operation of the entire system requires that each of these elements be airtight and mechanically sound. Replacing the valve with an original component intended for the Audi RS4 B8 allows for the restoration of proper exhaust circulation and facilitates further diagnostics of any potential faults.

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 additional valves, pipes, or modules cooperating with exhaust gas recirculation, check the available parts in the Audi EGR valves and parts category.

Support for selection and repairs of older models

When repairing vehicles where the availability of new components is sometimes limited, used EGR system elements are often the most rational solution. It is worth reading the practical tips regarding the selection and installation of such components – you will find them in the article No parts at the dealership? How to deal with repairing older models using dismantled parts, which discusses how to effectively use components from the secondary market.