The Genuine BMW Left Sill Cover Lid (Black) - 51478238801 is a replacement part for BMW vehicles. It is a black cover lid that is designed to fit the left side sill of the vehicle. This cover lid is made from high-quality materials and is an authentic BMW product. It is designed to provide a sleek and seamless look to the vehicle's exterior while also protecting the left side sill from damage and wear. This cover lid is specifically designed for BMW models and is an essential component for maintaining the overall appearance and functionality of the vehicle.