The Genuine BMW Covering Upper (Chrom) - 51318125899 is a chrome-plated covering that is designed to fit on the upper portion of a BMW vehicle. It is a genuine BMW product, meaning it is made by the original manufacturer and is of high quality. This covering is used to enhance the appearance of the vehicle and protect the upper portion from scratches and other damage. It is made specifically for BMW models and is an official part of their accessories line. The part number for this product is 51318125899.