The Genuine Porsche Mass Air Flow Sensor O-Ring - 95511064610 is a small rubber ring designed to fit around the mass air flow sensor of a Porsche vehicle. This O-ring helps to create a tight seal between the sensor and the air intake system, preventing any air leaks that could affect the accuracy of the sensor's readings. It is an essential component for maintaining the proper functioning of the mass air flow sensor, which is responsible for measuring the amount of air entering the engine and adjusting the fuel-to-air ratio accordingly. This product is an authentic Porsche part and is specifically designed for use in Porsche vehicles.