Genuine OEM Audi Rear Center Vent Hose, part number 079121439A. This hose is an integral part of the vehicle's heating, ventilation, and air conditioning (HVAC) system, responsible for channeling conditioned air to the rear center passenger vents. Its specific routing and connectors ensure efficient airflow distribution. Using a genuine OEM hose guarantees the correct diameter, flexibility, and connection points for a leak-free and effective climate control system.