The Genuine BMW Outer Weatherstrip Rear Left Door (Gloss Black) - 51357220189 is a high-quality replacement part for the rear left door of a BMW vehicle. It is designed to provide a tight seal between the door and the frame, preventing water, dust, and noise from entering the car. The weatherstrip is made of durable materials and has a glossy black finish, matching the original design of the door. It is an authentic BMW product and is specifically designed to fit and function perfectly in BMW vehicles. This weatherstrip is an essential component for maintaining the integrity of the door and ensuring a comfortable driving experience.