Audi A4 B8 A5 8T A6 C6 FSI Petrol Auxiliary Secondary Air Pump 079959253

Audi A4 B8 A5 8T A6 C6 FSI Petrol Auxiliary Secondary Air Pump is an original component from the Secondary air pumps group, designed for FSI petrol engines in selected Audi models. It ensures the proper operation of the secondary air injection system, which supports efficient exhaust gas discharge and stable engine performance.

Specifications and technical data

• SKU: 079959253
• Mark: Audi
• Condition: Used
• OEM Part Number: 079959253
• Substitutable numbers: 079959253, 079 959 253, 079959231
• Fuel type: Petrol
• Category: Secondary Air & Smog Pumps

Purpose and function in the engine system

The presented secondary air pump has been designed to work with FSI petrol engines in Audi A4 B8, A5 8T, and A6 C6 models. It is responsible for supplying additional air to the exhaust system during the start-up and warm-up phase, which promotes more complete combustion of the mixture and reduces the emission of harmful exhaust components.

Thanks to the proper operation of the pump, the engine control system can maintain stable idle speed after start-up, and the catalytic converter reaches its operating temperature faster. This translates into smoother engine operation, better cold-start performance, and correct interaction with the on-board diagnostic system.

Benefits of using an original secondary air pump

Using an original Audi secondary air pump allows you to maintain the factory performance parameters of the exhaust and engine control systems. This component is structurally matched to the specific architecture of FSI units, which facilitates installation and minimizes the risk of leaks or improper mounting.

• Proper cooperation with the engine control system in Audi vehicles.
• Appropriately selected air flows for FSI petrol units.
• Compatibility with factory mounts and hoses in the engine bay.

For the user, this means predictable vehicle behavior, the absence of unwanted error messages related to the secondary air system, and compliance with factory emission standards.

Operational characteristics and installation

The pump is an electro-mechanical component operating under demanding thermal conditions in the engine bay. Proper selection based on fuel type – in this case, petrol – is crucial for the durability and correct operation of the entire system. The offered unit comes from dismantling, which allows for an economical replacement while maintaining the manufacturer's original specifications.

During installation, it is recommended to:

• check the condition of air hoses and electrical connectors,
• verify mounts and vibration-damping elements,
• check the system for leaks after starting the engine.

This approach reduces the risk of needing further intervention in the system and allows you to fully utilize the potential of the installed pump.

Integration with other fuel and exhaust system components

The secondary air system works in conjunction with the fuel supply and exhaust systems, so its condition affects the overall health of the engine. For vehicle owners with petrol engines, more detailed information on diagnostics and the selection of fuel supply components may be useful – you can find them in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses, among other things, selecting parts by OEM numbers and the principles of proper operation.

Expansion of the secondary air system in Audi

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as additional pumps, control valves, or air supply hoses, check the available parts in the Audi secondary air pumps category.

By choosing components from this group, you can consistently restore the entire system responsible for secondary air supply, which promotes stable engine operation, correct OBD diagnostics, and maintaining emission parameters at the level intended by the manufacturer.