This is a genuine BMW moulding for the rear left side rocker panel. The part number is 51128184507. It is designed to fit and function perfectly with your BMW vehicle. This moulding helps protect the rocker panel from damage and adds a sleek, stylish look to your car. It is made with high-quality materials to ensure durability and longevity. This product is an original BMW part and is recommended for use in maintaining the authenticity and performance of your vehicle.