This product is a Genuine BMW Left Tail Light Cover, part number 51479129947. It is a replacement cover for the left side of the tail light on a BMW vehicle. This cover is made by BMW and is an authentic, original equipment manufacturer (OEM) part. It is designed to fit and function just like the original cover on your BMW. This tail light cover is made of high-quality materials and is built to last. It is an essential component for ensuring the proper functioning and visibility of your vehicle's tail lights.