Audi S5 8T 4.2 FSI CAUA Adapter Combination Valve Right O/S 079131166Q

Audi S5 8T 4.2 FSI CAUA Adapter Combination Valve Right O/S is an original component from the EGR Valves and Parts group, designed for the right side of the exhaust gas recirculation system in the 4.2 FSI engine. This solution helps maintain stable engine operating parameters, reduce exhaust emissions, and ensure proper cooperation with the control electronics.

Specifications and technical data

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

Purpose and technical function

The presented valve is dedicated to the Audi S5 8T model with the 4.2 FSI CAUA engine and is responsible for controlled exhaust gas recirculation on the right side of the system. A properly functioning EGR component stabilizes combustion temperature, supports the reduction of nitrogen oxides, and helps maintain smooth engine operation across the full load range.

Thanks to its factory design, the valve works with the original engine control unit, maintaining correct flow characteristics and response times. This is particularly important in high-power units, where precision in mixture and exhaust gas control has a direct impact on performance and refinement.

Construction and fitment

The component has been designed as part of the EGR system on the right side of the engine, with geometry and mounting points matched to the factory configuration of the Audi S5 8T. The appropriate shaping of the ports and body facilitates correct connection to the manifold and hoses, which shortens installation time and minimizes the risk of leaks.

The original construction ensures compatibility with factory seals, hoses, and accessories, allowing the valve to be used as a direct replacement for a worn-out part without the need for any system modifications.

Condition, application, and benefits of replacement

The product is offered as a used part, which allows for an economical repair of the EGR system while maintaining the original technical specifications. Replacing a faulty valve with a functional unit of this type can help reduce issues such as power loss, unstable idle speed, or increased exhaust smoke.

Selecting the correct EGR valve for the right side is particularly important in large-displacement engines, where thermal and pressure loads are high. Using an original component from the same design group allows for consistent operating parameters on both sides of the EGR system, which translates into more predictable engine behavior.

Integration with the Audi EGR system

As an element from the EGR Valves and Parts category, the valve works with other components of the exhaust gas recirculation system – hoses, exhaust gas coolers, and electronic controls. A properly selected and installed component helps maintain compliance with factory ECU maps, which is essential for both engine durability and meeting emission standards.

If you are planning a comprehensive repair or upgrade of your Audi's engine bay and need other elements from the same group, such as additional valves, hoses, or control elements, check out the available parts in the Audi EGR Valves and Parts category.

Technical support and additional knowledge

When working with exhaust gas recirculation system components, it is worth paying attention to the general condition of the engine and related systems, such as the cooling or lubrication system, as their condition affects the thermal load on the EGR valve. For a better understanding of the relationship between engine operating temperature and component durability, you can use the advice provided in the article Engine cooling system – overheating, repair, and used radiators.

If you are considering the choice between new and used components for your car and want to consciously evaluate the cost-to-durability ratio, the guide Car parts – new or used? Comparing costs, quality, and durability, which discusses the practical aspects of selecting replacement parts, may be helpful.