The Genuine BMW Temperature Sensor Heater (part number 64118391392) is a component designed for use in BMW vehicles. This temperature sensor heater is responsible for monitoring the temperature of the engine and ensuring that it stays within safe operating levels. It works by heating up the sensor to a specific temperature, allowing it to accurately measure the temperature of the engine. This information is then sent to the engine control unit, which uses it to adjust fuel injection and ignition timing. The Genuine BMW Temperature Sensor Heater is a high-quality, reliable component that is essential for proper engine performance and should be replaced with an OEM part for optimal results.