Genuine OEM Audi Front Left Door Window Guide, part number 8P3837439D. This component is essential for guiding the window glass smoothly and precisely as it moves up and down within the door frame. It is specifically installed in the front left door assembly. Weighing 1.357 kg, this guide is constructed for durability and accurate window tracking. Opting for a genuine OEM window guide ensures the correct dimensions, material properties, and friction characteristics, preventing window binding, rattling, and premature wear.