The Genuine BMW Bumper Cover Support Rail - 51127381119 is a part made by BMW specifically for their vehicles. It is a support rail that is designed to hold the bumper cover in place on the front of the vehicle. This rail is made of high-quality materials to ensure durability and strength. It is an essential component for the proper functioning of the front bumper and helps to protect the vehicle in the event of a collision. This product is an authentic BMW part and is designed to fit perfectly with the vehicle's bumper cover.