The Genuine BMW Seal Door Gap Door Rear Bottom - 51357179125 is a high-quality rubber seal designed specifically for BMW vehicles. It is used to seal the gap between the door and the body of the car, preventing water, dust, and other debris from entering the interior of the vehicle. This seal is located on the bottom of the rear door and is essential for maintaining a clean and dry interior. It is an authentic BMW product and is made to the highest standards for durability and performance.