The Genuine BMW Finisher Window Frame Top Fr Door (Black) - 51337189090 is a replacement part for the window frame on the front door of a BMW vehicle. It is a genuine BMW product, ensuring high quality and compatibility with the vehicle. The finisher is designed to fit on the top of the window frame and is finished in black color. It is a durable and stylish addition to the vehicle's exterior, providing a sleek and finished look. This product is specifically designed for BMW models and is an essential component for maintaining the overall appearance and functionality of the vehicle.