This Genuine BMW Window Guide Web Cover Left is a replacement part for the left side of a BMW vehicle's window guide. It is made of high-quality materials to ensure durability and proper functioning. This cover helps to protect the window guide from dirt, debris, and other external factors that can cause damage. It is designed specifically for BMW models and has the part number 51358223799. This product is an authentic BMW part and is suitable for use in various BMW vehicles. It is an essential component for maintaining the smooth operation of the window and ensuring a secure fit.