This is a Genuine BMW Gasket Door Joint C Column Left, part number 51228223763. It is designed to fit on the left side of the vehicle's C column and provides a tight seal between the door and the body of the car. This gasket helps to prevent water, dust, and other debris from entering the interior of the vehicle, ensuring a comfortable and clean driving experience. Made with high-quality materials, this gasket is a reliable and durable choice for your BMW.