Audi A4 S4 B6 B7 4.2 V8 Adapter Combination Valve Pipe Left O/S 079133863B

Audi A4 S4 B6 B7 4.2 V8 Adapter Combination Valve Pipe Left O/S is an original exhaust gas recirculation system component, designed for installation on the left side of the 4.2 V8 engine in A4 and S4 B6/B7 generation models. This component from the EGR valves and parts group allows for maintaining proper exhaust gas flow within the system, which promotes stable engine operation and compliance with the manufacturer's design specifications. Thanks to its factory fitment, it is a service-friendly and technically predictable solution.

Specifications and technical data

• SKU: 079133863B
• Mark: Audi
• Condition: Used
• OEM Part Number: 079133863B
• Substitutable numbers: 079133863B, 079 133 863 B
• Location on the vehicle: Left
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The EGR valve and pipe adapter on the left side of the 4.2 V8 engine is responsible for a tight and stable connection of the exhaust gas recirculation system components. In practice, this means:

• maintaining the correct direction of exhaust gas flow between subsequent EGR components,
• reducing leaks that could cause power loss or ECU errors,
• maintaining the correct operating parameters of the engine in terms of emissions and performance.

In Audi vehicles with the 4.2 V8 engine, precise fitment of EGR components is important for the smooth operation of both cylinder banks, which is why using the correct adapter on the left side is essential from a service perspective.

Compatibility with Audi A4 / S4 B6 B7 4.2 V8 models

The presented adapter has been designed specifically for the EGR system in Audi A4 and S4 B6 and B7 generation models with the 4.2 V8 engine. This means that the geometry, connection diameters, and mounting method are consistent with the factory configuration of these units. As a result:

• installation is predictable, without the need for modifications,
• compatibility with the original EGR valve and pipe is maintained,
• the risk of issues with seal fitment and mounting points is reduced.

The location on the left side of the engine is clearly defined, which facilitates the selection of the correct component during repair or replacement of exhaust gas recirculation system parts.

Characteristics of the used component

The offered EGR adapter is a used part, sourced from an Audi vehicle dismantling. Such components are frequently chosen by workshops specializing in A4 and S4 models with the 4.2 V8 engine because they allow for maintaining the original system specification at reasonable maintenance costs. In the case of items from the EGR valves and parts group, using dismantled parts is often beneficial when the priority is to maintain factory geometry and materials.

Before installation, it is recommended to perform a standard verification of the condition of the sealing surfaces and mounting points, as well as to use new gaskets in accordance with the vehicle manufacturer's recommendations. This approach promotes trouble-free operation after the repair is completed.

Benefits of using an original EGR adapter

Using an original EGR valve and pipe adapter on the left side of the 4.2 V8 engine provides a number of practical service benefits:

• Factory fitment – maintaining the original geometry of connections in the EGR system, without the need for system modifications.
• Consistency with other system components – compatibility with the factory valve, pipe, and accessories in the engine bay.
• Stable operating parameters – reducing the risk of leaks and errors related to exhaust gas recirculation.

For workshops servicing 4.2 V8 units in Audi A4 and S4, choosing an original EGR adapter is a technically predictable solution that helps keep the vehicle in a configuration close to the factory state.

Expanding Audi EGR system service

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 hoses, valves, or exhaust gas recirculation connectors, check out the available parts in the Audi EGR valves and parts category.

When selecting used components for premium class cars, it is worth using proven solutions from dismantling. If you are interested in a broader context of servicing high-end cars using original used parts, our blog article may be helpful: Luxury within reach – how to service a Porsche legend using proven used parts.