The Genuine BMW Tail Light Assembly - 63217456523 is a replacement part for BMW vehicles. It is designed to fit securely and function properly as a rear light for the vehicle. This tail light assembly is an authentic BMW product and is made with high-quality materials to ensure durability and longevity. It is a direct replacement for the original tail light and is compatible with the specific make and model of the vehicle. The assembly includes the lens, housing, and bulbs, making it a complete and convenient solution for replacing a damaged or malfunctioning tail light.