Genuine OEM Audi Rear Upper Door Hinge, part number 4M8831403B. This hinge allows the rear door to pivot smoothly open and closed, ensuring proper alignment and secure closure. It is positioned on the upper left side of the vehicle's rear door. Made from durable metal, this hinge measures approximately 10 cm long. Using genuine OEM hinges ensures factory tolerances for smooth, quiet operation and long-term durability, maintaining door integrity and safety.