Genuine OEM Audi Exterior Door Seal, part number 420837912J. This seal is fitted to the exterior edge of the door to provide a weather-tight seal against the vehicle body. It helps to prevent water, wind, and road noise from entering the cabin. Made from durable, weather-resistant rubber compound. Proper exterior sealing is vital for protecting the vehicle's interior from the elements and maintaining a quiet driving experience. Genuine OEM parts guarantee precise fitment and long-lasting performance.