Audi RS4 B7 4.2 FSI Air Pump Valve BNS 079131101AP

Audi RS4 B7 4.2 FSI Air Pump Valve BNS is a component from the EGR Valves and Parts group, designed for the air supply system in the V8 FSI petrol engine. It is responsible for the proper control of secondary air flow, which is crucial for the operation of the BNS unit and exhaust emission parameters. This used, original Audi component allows for maintaining the factory engine performance characteristics and compatibility with the vehicle's installation.

Specifications and technical data

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

Purpose and technical function

The presented air pump valve is dedicated to the 4.2 FSI power unit in the Audi RS4 B7 generation model with the BNS engine. Its task is to control the flow of secondary air directed to the exhaust system during the start-up and warm-up phase, which supports the exhaust after-treatment process and stabilizes cold engine operation. A properly functioning valve in this application is important for:

• maintaining correct exhaust emission parameters,
• cooperation with the factory engine control unit,
• stable operation of the V8 FSI unit at low RPM.

Benefits of using an original Audi component

Using an original Audi air pump valve in the RS4 B7 air supply system ensures that factory flow and control characteristics are maintained. This means proper matching to the ECU maps, wiring harness, and the design of manifolds and air ducts. For the user, this translates into:

• consistent cooperation with the EGR system and emission control system,
• reduced risk of diagnostic errors related to secondary air flow,
• maintaining the stock performance parameters of the BNS engine without the need for software modifications.

Installation and operational characteristics

As a component from the EGR Valves and Parts group, the air pump valve is intended for installation in the existing intake and exhaust system of the Audi RS4 B7 4.2 FSI. The OEM design allows for the use of factory mounting points and stock connectors, which facilitates service work and reduces vehicle downtime. The used component is a good solution for:

• repairing the secondary air system after error codes appear in the ECU,
• restoring the stock configuration after previous modifications,
• optimizing service costs while maintaining the original part specification.

Integration with Audi EGR Valves and Parts system

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 exhaust gas recirculation valves, vacuum lines, or air flow control elements, check the available parts in the Audi EGR Valves and Parts category.

Technical support and service cost optimization

When planning the service of premium class cars, including sports models such as the RS4, it is worth approaching the selection of used OEM components, their diagnostics, and preparation for installation consciously. Practical tips on reducing maintenance costs while maintaining original quality can be found in the article: Proven ways to cheaper MINI car service using original components. Although the description concerns a different brand, the principles of selecting and verifying used parts discussed there are also helpful when planning work on the Audi RS4 B7.