The Genuine BMW Left Rear Window Guide (part number 51358223807) is a high-quality, OEM replacement part for the left rear window of BMW vehicles. It is designed to guide the window smoothly up and down, ensuring proper functionality and preventing any potential damage to the window or window mechanism. This window guide is made from durable materials and is specifically designed to fit and function seamlessly in BMW models. It is an essential component for maintaining the proper operation of the vehicle's window system.