Audi S7 4G8 Secondary Air Pump Valve EGR Valve 4.0 TFSI 079131101AJ

Audi S7 4G8 Secondary Air Pump Valve EGR Valve 4.0 TFSI is an original component from the EGR valves and parts group, designed for the 4.0 TFSI petrol engine in the Audi S7 4G8 generation. This used OEM component ensures the proper operation of the exhaust gas recirculation and secondary air system, which translates into stable engine performance and compliance with exhaust emission requirements.

Specifications and technical data

• SKU: 079131101AJ
• Mark: Audi
• Condition: Used
• OEM Part Number: 079131101AJ
• Substitutable numbers: 079131101AJ, 079 131 101 AJ
• Fuel type: Petrol
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The presented Audi S7 4G8 Secondary Air Pump Valve EGR Valve has been designed specifically for the high-performance 4.0 TFSI petrol engine in the Audi S7 4G8. Its task is to precisely control the flow of air and exhaust gases in the recirculation system, which supports:

• maintaining the correct air-fuel mixture under low and medium load conditions,
• reducing nitrogen oxide and particulate matter emissions,
• stable engine operation during start-up and warm-up.

Thanks to its precise fit for this specific petrol engine configuration, the valve works seamlessly with the factory engine control unit, maintaining original maps and control strategies.

Benefits of using an original EGR valve

Using an original Audi S7 4G8 Secondary Air Pump Valve EGR Valve allows for maintaining the integrity of the entire intake and exhaust system. In practice, this means:

• reliable fitment – compatibility with factory mounting points and connections,
• proper cooperation with the vehicle's sensors and electrical installation,
• maintaining the factory performance parameters of the 4.0 TFSI engine without the need for software modifications.

This used OEM component is a reasonable compromise between cost and quality – it allows for reduced expenses while maintaining the design specified by the vehicle manufacturer.

Installation and operational characteristics

The Audi S7 4G8 Secondary Air Pump Valve EGR Valve is designed for operation in a petrol-powered system. The construction, intended for high thermal and pressure loads in the 4.0 TFSI engine, ensures parameter stability under typical operating conditions of a premium-class vehicle with increased power.

During replacement, it is recommended to:

• check the tightness of vacuum lines and secondary air hoses,
• verify the correct operation of the EGR control via computer diagnostics,
• clean the seats and mating surfaces to ensure proper system sealing.

This approach minimizes the risk of recurring faults related to exhaust gas recirculation and helps maintain smooth engine operation.

Component condition and use in service practice

The offered Audi S7 4G8 Secondary Air Pump Valve EGR Valve is a used component, making it an attractive solution for optimizing repair costs in the Audi S7 4G8. Choosing an original component from the secondary market is particularly beneficial for advanced petrol engines, where the precision of the EGR system has a significant impact on engine refinement and durability.

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

Technical support and operational knowledge

When working with advanced petrol engines and selecting used supply and exhaust gas recirculation system components, it is worth using reliable sources of knowledge. To better understand how selecting parts from the secondary market affects service costs and engine durability, read the article Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs, which discusses practical aspects of operating modern engines and optimizing service expenses.

If you are also interested in the broader context of exhaust system operation and its components in premium cars, the post Performance exhaust system: used performance manifolds and catalytic converters on the road, describing the selection of used components in vehicles such as Audi, BMW, or Mercedes, may be helpful.