The Genuine BMW Cover Window-Guide Web Left - 51357187815 is a protective cover designed specifically for the left side window-guide web of BMW vehicles. It is made from high-quality materials and is an original BMW product, ensuring a perfect fit and optimal performance. This cover helps to prevent damage to the window-guide web, which is responsible for guiding the window up and down smoothly. It is an essential component for maintaining the proper functioning of the window mechanism. This cover is suitable for various BMW models and is a reliable choice for protecting your vehicle's window-guide web.