The Genuine BMW Outer Weatherstrip Left - 51211977675 is a replacement part for the outer weatherstripping on the left side of a BMW vehicle. It is designed to provide a tight seal between the door and the body of the car, preventing water, dust, and noise from entering the interior. This weatherstrip is an authentic BMW product, ensuring high quality and proper fit for your vehicle. It is made from durable materials to withstand various weather conditions and regular use. This product is specifically designed for the left side of the vehicle and is compatible with various BMW models.