The Genuine BMW Ultrasonic-Sensor (Liquid Blue) is a high-quality sensor designed specifically for BMW vehicles. It is used to detect objects and obstacles in the vehicle's surrounding area using ultrasonic waves. The sensor is a liquid blue color, making it easily identifiable and aesthetically pleasing. It is a genuine BMW product, ensuring compatibility and reliability. This sensor is an essential component of various safety and driver assistance systems in BMW vehicles, providing accurate and timely information to the vehicle's control systems. It is part number 66209261585.