The Genuine BMW Cover Column B Door Rear Left - 51357177955 is a replacement part for the rear left door of a BMW vehicle. It is a cover that fits over the B column, which is the structural support between the front and rear doors. This cover is designed specifically for BMW models and is made from high-quality materials to ensure durability and a perfect fit. It is an authentic BMW product, ensuring the same quality and performance as the original part. This cover is essential for maintaining the aesthetic and structural integrity of the vehicle.