Genuine OEM Audi Secondary Air Injection Pump, part number 079959231G. This crucial component is responsible for pumping fresh air into the exhaust system. Its primary function is to aid in the oxidation of unburnt hydrocarbons and carbon monoxide, particularly during cold engine starts, thereby reducing harmful emissions. The pump weighs approximately 1.35 kg and measures 0.175 m in length. Opting for a genuine OEM secondary air injection pump ensures correct air flow, pressure, and seamless electrical integration with the engine management system, which is vital for maintaining proper emissions control and engine performance.