Genuine OEM Volkswagen Rear Left Window Guide, part number 11A839439K5AP. This guide is essential for the proper function of the power window system, ensuring the window glass moves smoothly and securely within the door frame. It is positioned on the rear left door. Finished in Black (5AP), this guide weighs approximately 1.13 kg. Using a genuine OEM window guide guarantees the correct material flexibility and precise dimensions, preventing window binding, rattling, and premature wear on the window regulator.