The Genuine BMW Temperature Sensor Heater - 64116938633 is a component that is designed to regulate the temperature of the engine in a BMW vehicle. It is a small electrical device that is responsible for measuring the temperature of the engine and sending that information to the engine control unit. The heater element within the sensor ensures that the temperature is accurately measured, even in extreme weather conditions. This product is an authentic BMW part and is specifically designed to fit and function perfectly in BMW vehicles. It is an important component in maintaining the optimal performance and efficiency of the engine.