Genuine OEM Volkswagen Left Rear Door Window Regulator, part number 1T0839461N. This complex assembly is responsible for controlling the precise raising and lowering of the door window. It is positioned within the left rear door. Weighing 3.205 kg and measuring 0.822 m in length, this regulator ensures smooth and reliable window operation. Using a genuine OEM window regulator guarantees correct motor calibration, cable tension, and mounting points for optimal performance and longevity.