Secondary Air Pump Volkswagen Seat Skoda Audi 1.8T Auxiliary Unit 078906601M

Volkswagen Seat Skoda Audi 1.8T Secondary Air Injection Pump 078906601M is an original VAG group component designed for 1.8T engine systems, responsible for injecting additional air into the exhaust system during cold starts. Thanks to its factory OEM design, the pump ensures stable operation of the secondary air system, which translates to more efficient exhaust afterburning and correct operation of the emission system. A used component from this series is a solution that allows for the technical repair of the secondary air system while maintaining compliance with the manufacturer's factory specifications.

Specifications and technical data

• SKU: 078906601M
• Mark: Audi
• Condition: Used
• OEM Part Number: 078906601M
• Substitutable numbers: 078906601M, 078 906 601 M
• Category: Secondary Air & Smog Pumps

Role of the Secondary Air Pump in the 1.8T Engine

The secondary air pump in Audi, Volkswagen, Seat, and Skoda 1.8T units is responsible for delivering a controlled dose of air to the exhaust system during the engine warm-up phase. This supports the catalytic converter's operation, accelerates reaching operating temperature, and reduces the emission of unburned hydrocarbons. A functional component from this group helps maintain correct engine operating parameters and stable cooperation with the control electronics.

Construction and OEM Fitment

The offered pump belongs to the Secondary Air Pumps category and is structurally prepared to work with factory brackets, hoses, and electrical connectors in VAG group vehicles with the 1.8T engine. This makes installation a near plug-and-play process, without the need for wiring modifications or adapter fabrication. The original Audi solution ensures proper airflow parameters and compatibility with the engine control unit software.

Practical Application and Benefits of Installation

Replacing a faulty secondary air pump with a functional OEM part helps eliminate common symptoms of secondary air system failures, such as stored error codes in the control unit, rough cold engine operation, or problems passing emission tests. For the user, this means:

• more stable starting and operation of the 1.8T unit during the warm-up phase,
• correct cooperation with the exhaust system and catalytic converter,
• maintaining compliance with factory emission parameters,
• reduced risk of the engine warning light related to the secondary air system appearing.

A used OEM component is a sensible choice for repairs where maintaining the original technical specification is important while optimizing service costs.

Selection by Numbers and Vehicle Compatibility

The pump was designed by Audi for specific 1.8T engine configurations in VAG group vehicles, so before installation, it is crucial to verify compatibility by OEM part number and interchangeable numbers. This helps avoid mechanical and electrical connection issues, and ensures correct cooperation with the factory engine control unit. Proper component selection leads to trouble-free operation and reduces the risk of further intervention in the system.

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

Technical Support and Expert Knowledge

To better understand the relationships between individual components in the engine bay, including the cooperation of the secondary air system with fuel supply, it is worth consulting specialized materials. Practical information on diagnostics, OEM number selection, and operation can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Regeneration, which helps to view engine operation holistically.

If you want to consciously choose components from the aftermarket and minimize the risk of a wrong purchase, use the advice contained in the material No More Wrong Purchases! How to Professionally Select Used Car Parts, Saving Time and Nerves, which discusses, among other things, the importance of OEM numbers and the principle of their compatibility when selecting used parts.