The Genuine Porsche Mass Air Flow Sensor (part number 993606123AX) is a high-quality replacement part for Porsche vehicles. This sensor is responsible for measuring the amount of air entering the engine and sending this information to the engine control unit. It is a crucial component in ensuring the proper air-to-fuel ratio for optimal engine performance and fuel efficiency. This Genuine Porsche Mass Air Flow Sensor is designed to fit perfectly and function flawlessly in Porsche 911 (993) models. It is a genuine OEM part, ensuring the highest level of quality and reliability.