The Genuine BMW Tire Pressure Monitoring System Sensor (part number 36106887147) is a small device that is installed on each tire of a BMW vehicle to monitor the tire pressure. It is designed to constantly measure the air pressure inside the tire and send this information to the vehicle's computer system. This allows the driver to easily keep track of the tire pressure and ensure that it is at the optimal level for safe driving. The sensor is made by BMW and is specifically designed for their vehicles, ensuring a perfect fit and reliable performance. It is an essential component for maintaining the safety and efficiency of the vehicle's tires.