The Genuine BMW Rear Door Brake - 51227197874 is a replacement part for the rear door of a BMW vehicle. It is designed to provide braking functionality for the rear door, ensuring that it stays securely closed when not in use. This part is made by BMW and is specifically designed to fit and function properly in BMW vehicles. It is made with high-quality materials to ensure durability and longevity. This rear door brake is an essential component for the safe and proper operation of a BMW vehicle.