The Genuine BMW Finisher Side Window Rear Left (Alu Satin) - 51377315419 is a high-quality, original equipment manufacturer (OEM) part designed specifically for BMW vehicles. It is a finisher piece that is installed on the rear left side window of the vehicle. The finisher is made from aluminum with a satin finish, giving it a sleek and modern look. It is designed to seamlessly blend in with the overall design of the vehicle and provide a clean and polished appearance. This product is a genuine BMW part, ensuring the highest level of quality and compatibility with your vehicle. It is an essential component for maintaining the integrity and aesthetics of your BMW.