Genuine OEM Audi Rear Sunroof Drain Hose, part number 4KE877203A. This essential hose is responsible for channeling rainwater and other moisture away from the sunroof frame, preventing it from entering the vehicle's interior. It is specifically positioned at the rear of the sunroof assembly to facilitate effective drainage. Weighing 0.265 kg, this hose is designed for optimal routing and connection. Using a genuine OEM drain hose ensures the correct material composition for durability against environmental factors and maintains the precise internal diameter and routing geometry required for efficient water flow, preventing blockages and leaks.