The Genuine BMW Trailer Coupling Flap Prime-Coated (M) - 51127898122 is a high-quality, OEM trailer coupling flap designed specifically for BMW vehicles. It is made from durable materials and is coated with a prime finish for added protection against rust and corrosion. This trailer coupling flap is designed to fit perfectly onto your BMW's trailer hitch and provides a secure and reliable connection for towing trailers and other heavy loads. It is an essential accessory for any BMW owner who frequently uses their vehicle for towing purposes.