The Genuine BMW Mass Air Flow Sensor (part number 13628605565) is a crucial component in a vehicle's engine management system. It measures the amount of air entering the engine and sends this information to the engine control unit, which then adjusts the fuel injection and ignition timing for optimal performance and fuel efficiency. This sensor is designed specifically for BMW vehicles and is manufactured to the highest quality standards, ensuring reliable and accurate readings. It is an essential part for maintaining the proper functioning of the engine and should be replaced with a genuine BMW part for optimal performance.