The Genuine BMW Roof Moulding Left (Black) - 51138045379 is a replacement part for BMW vehicles. It is a black-colored moulding that is designed to fit on the left side of the vehicle's roof. This moulding helps to protect the roof and add a sleek and stylish look to the vehicle. It is made from high-quality materials to ensure durability and longevity. This product is an authentic BMW part and is designed specifically for BMW vehicles.