Genuine OEM Audi Window Regulator, part number 8P7839461B. This essential mechanism is responsible for allowing the window to be smoothly raised and lowered within the door frame. It is specifically designed for the left rear door and comes without the electric motor. Weighing approximately 2.745 kg, this regulator ensures robust and reliable performance. Choosing a genuine OEM window regulator guarantees the correct mounting points, cable tension, and track alignment, which are crucial for quiet, consistent window operation and preventing premature wear.