Genuine BMW M3 Door Sill - 51478046475 - Enhance the look and feel of your BMW with this Genuine BMW M3 Door Sill. This sleek and stylish door sill offers a unique and stylish look to your vehicle, while also providing protection from scuffs and scratches. Made from high-quality materials, this door sill is designed to last. It is an easy to install upgrade that will make your BMW stand out from the crowd.