Audi A5 S5 8T 4,2 V8 Exhaust Gas Combination Valve Right O/S 079131102C

Audi A5 S5 8T 4,2 V8 Exhaust Gas Combination Valve Right O/S is an original exhaust gas recirculation system component designed for the right side of the V8 unit in Audi A5/S5 8T models. Thanks to its factory design, it ensures proper engine operation, stable exhaust emission parameters, and correct interaction with the control electronics. This is a solution for users who want to maintain consistency with the factory EGR system design and avoid fitment issues.

Specifications and technical data

• SKU: 079131102C
• Mark: Audi
• Condition: Used
• OEM Part Number: 079131102C
• Substitutable numbers: 079131102C, 079 131 102 C
• Location on the vehicle: Right
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The presented valve belongs to the EGR valves and parts category, responsible for controlled exhaust gas recirculation in the 4.2 V8 petrol engine. The component is mounted on the right side of the power unit, which is significant in the configuration of V-engines where the intake and exhaust systems are divided into two cylinder heads. A properly functioning EGR valve helps reduce nitrogen oxide emissions, stabilizes combustion temperature, and supports smooth operation of both cylinder banks.

Benefits of using an original EGR valve

Using an original EGR valve in the Audi A5/S5 8T 4.2 V8 allows you to maintain engine performance parameters in accordance with the manufacturer's specifications. In practice, this means:

• better compatibility with the factory engine control unit and sensors,
• stable exhaust emission values, which are important for technical inspections,
• reduced risk of diagnostic errors related to the EGR system,
• maintaining the V8 unit's operating characteristics consistent with the Audi design.

For users who value technically correct operation of the exhaust gas recirculation system, this is a solution that allows avoiding compromises typical of aftermarket replacements of uncertain origin.

Installation characteristics and fitment

The valve has been designed specifically for the 4.2 V8 unit in the Audi A5/S5 8T, taking into account the geometry of the manifolds, exhaust and intake pipes, and the limited space in the engine bay. The placement on the right side of the engine makes it easier for a mechanic to identify the correct part during replacement or diagnostics. Thanks to its factory origin, the following are preserved:

• correct mounting points to the cylinder head and manifolds,
• correct diameters and shape of the exhaust gas flow channels,
• compatibility with original seals and accessories.

Such a configuration facilitates efficient installation and limits the need for additional modifications or adjustments of components.

Product condition and practical application

The offered EGR valve is a used component, which makes it an attractive option for Audi A5/S5 8T 4.2 V8 owners looking for an economical solution while maintaining the original design. In many cases, replacing a worn-out valve with a functional part from disassembly allows for restoring the proper operation of the EGR system, reducing smoke, improving idle smoothness, and minimizing the appearance of errors in the controller's memory.

EGR system expansion and selection of other components

The exhaust gas recirculation system in a V8 engine consists of several cooperating components – valves, pipes, exhaust gas coolers, and control elements. 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.

Expert support and cost optimization

When selecting used components for premium vehicles such as Audi, it is important to understand how to properly assess the condition of parts and plan the repair. In the context of economical operation and conscious component selection, it is worth reading the advice on used body parts and other subassemblies – you will find them in the article Replacing body parts with used ones – can bodywork parts from disassembly look like new?, which shows how to reasonably use parts from disassembly without sacrificing quality.