The Genuine BMW Outer Weatherstrip Rear Left Door (Black) - 51227135163 is a high-quality replacement part for BMW vehicles. It is designed to fit the rear left door and is made from durable materials to withstand harsh weather conditions. This weatherstrip helps to seal the door and prevent water, dust, and noise from entering the vehicle. It has a sleek black finish that matches the original design of the car and is an exact fit for easy installation. This product is an authentic BMW part and is guaranteed to provide a perfect fit and long-lasting performance.