Genuine OEM Audi Rear Inner Door Seal, part number 83F833721A. This rubber sealing component is designed to prevent water, wind, and road noise from entering the vehicle's cabin. It is installed around the perimeter of the rear inner door frame, creating a tight seal when the door is closed. Weighing approximately 1.641 kg, this seal is made from durable rubber. Using a genuine OEM door seal ensures the correct profile, material composition, and flexibility for effective long-term sealing and noise reduction.