Genuine OEM Audi Secondary Air Injection Combination Valve, part number 079131101AK. This valve controls the flow of air from the secondary air injection pump, playing a critical role in the vehicle's emissions control system. It is a component within the engine's secondary air injection assembly. Weighing approximately 0.232 kg, this valve is engineered for precise air flow regulation. Choosing a genuine OEM valve ensures exact calibration and reliable operation, maintaining the vehicle's designed emissions performance and engine efficiency.