The Genuine BMW Seal Rear Left Side Window (Gloss Black) - 51377307841 is a high-quality replacement seal for the left side window of a BMW vehicle. It is designed to provide a tight seal and prevent water and debris from entering the interior of the car. The seal is made from durable materials and has a sleek gloss black finish that matches the aesthetic of BMW vehicles. This product is an official BMW part and is guaranteed to fit and function properly. It is suitable for various BMW models and is an essential component for maintaining the integrity of the vehicle's windows.