Genuine OEM Audi Sunroof Drain Hose, part number 8K9877203C. This hose is responsible for channeling water efficiently away from the sunroof assembly, preventing leaks and potential water damage to the vehicle's interior. It is designed for the rear position. Made from durable, flexible material, it ensures reliable drainage and resistance to environmental factors. Genuine OEM hoses provide the correct routing geometry and material composition for effective water management, crucial for maintaining the integrity of the sunroof system.