This is a genuine BMW Channel Sealing Door Left, part number 51337279735. It is designed to seal the door on the left side of the vehicle, providing protection from outside elements such as rain, wind, and debris. This channel sealing is an essential component for maintaining the overall integrity and functionality of the door. It is made with high-quality materials and is specifically designed to fit BMW vehicles. This product is an authentic BMW part and is recommended for replacement or repair of damaged or worn channel seals.