Genuine OEM BMW Air Pump Control Valve, part number 11727540466. This valve regulates the flow of air in the secondary air injection system, vital for emissions control. The part has dimensions of 0.095 m length, 0.09 m width, and 0.07 m height, weighing 0.237 kg. Genuine OEM ensures the valve operates with the correct timing and flow rate for optimal emissions performance.