The Genuine BMW Air Outlet Grille Left (Black) - 51718173207 is a replacement part for BMW vehicles. It is a black plastic grille that is designed to direct air flow from the air conditioning or heating system to the left side of the vehicle's interior. This product is an authentic BMW part and is designed to fit and function just like the original grille. It is made from high-quality materials for durability and is an essential component for proper air circulation in the vehicle's cabin. This air outlet grille is specifically designed for the left side of the vehicle and is compatible with various BMW models.