The Genuine BMW Side Window Seal Rear Left (E39) - 51348207185 is a rubber seal specifically designed for the rear left side window of a BMW E39 model. It is a genuine OEM (Original Equipment Manufacturer) part made by BMW, ensuring high quality and perfect fit for your vehicle. This seal helps to prevent water, dust, and noise from entering the interior of the car through the window, providing a tight and secure seal. It is an essential component for maintaining the integrity of the window and ensuring a comfortable driving experience.