The Genuine BMW Parking Aid Sensor Housing (part number 51117484789) is a component used in BMW vehicles to house the parking aid sensors. These sensors are responsible for detecting obstacles and providing the driver with audible or visual alerts to assist with parking. This housing is made of high-quality materials and is designed to fit seamlessly into the vehicle's exterior. It is a genuine BMW product, ensuring reliability and compatibility with the vehicle's systems. This parking aid sensor housing is an essential part of the parking aid system, providing accurate and reliable detection of obstacles for safe and convenient parking.