Audi R8 42 RS4 B7 4.2 FSI Adapter Combination Valve Right O/S 079131166E

Audi R8 42 RS4 B7 4.2 FSI Adapter Combination Valve Right O/S is a specialized component from the EGR valves and parts group, designed for the right side of the system in selected Audi models with the 4.2 FSI engine. A properly selected adapter ensures a stable connection of the exhaust gas recirculation system components, which translates into predictable engine operation and correct interaction with the factory electronics.

Specifications and technical data

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

Purpose and function in the EGR system

The combination valve adapter on the right side is responsible for the precise positioning and airtight connection of the exhaust gas recirculation system components in the 4.2 FSI engine. A correctly selected component helps maintain stable exhaust flow parameters, which is important for the engine control unit, exhaust emissions, and the engine's operating culture. In high-power vehicles, such as the Audi R8 or RS4 B7, the proper operation of the EGR system is essential both from the point of view of engine durability and maintaining factory performance. Using an original adapter from this group allows for reducing the risk of leaks, diagnostic errors, and power drops resulting from incorrect exhaust gas recirculation.

Design, fitment, and installation

The adapter has been designed for the specific configuration of the 4.2 FSI unit, taking into account the geometry of the right side of the engine bay. Thanks to this, it ensures:

• proper fitment to the factory combination valve and adjacent EGR system components,
• stable mounting, reducing stress and vibrations in the connections,
• maintenance of the correct exhaust gas flow channel path. Such fitment facilitates the mechanic's work, shortens installation time, and reduces the risk of needing additional modifications. Precise mating with the EGR system is particularly important in engines with dense packaging, where access to components is limited.

Benefits of using an original adapter

Choosing a combination valve adapter dedicated to Audi with a 4.2 FSI engine brings a number of practical benefits:

• Compatibility with the factory system – maintaining the original geometry and mounting points, without the need for installation modifications.
• Stable operation of the exhaust gas recirculation system – reducing the risk of engine control unit errors related to incorrect exhaust flow.
• Better repeatability of engine operating parameters – particularly important in high-revving units used in R8 and RS4 B7 models.
• Possibility of utilizing existing service infrastructure – the adapter works with factory diagnostic and service procedures. Due to the nature of the product, it is particularly recommended for repairs where compliance with factory specifications is required, as well as when replacing EGR system components after a failure or upgrade.

Condition, verification, and practical application

The item comes from a group of used parts, which allows for an economical restoration of the EGR system's efficiency while maintaining the original design. In practice, this means the possibility of matching it to the existing installation without interfering with the factory project, which is important both in cars used daily and in collector's vehicles. Before installation, a standard check of connection tightness and the correct positioning of hoses and adjacent components is recommended. Proper seating of the adapter on the right side has a direct impact on the durability of the entire exhaust gas recirculation system and the comfort of subsequent service maintenance.

Service expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the exhaust gas recirculation area in your Audi and need other components from the same group, such as valves, hoses, or additional adapters, check the available parts in the Audi EGR valves and parts category. For a better understanding of the connections between the steering system, drivetrain, and engine components, as well as the impact of individual subassemblies on vehicle handling, it is worth referring to the guide material: Steering system and power steering – how it works and what breaks?. This will allow you to take a broader look at the dependencies between different vehicle systems and better plan your service work.