Genuine OEM Volkswagen Water Drain Hose, part number 7T1820127. This hose is a crucial component of the vehicle's heating, ventilation, and air conditioning (HVAC) system, responsible for draining condensed water from the evaporator core. It prevents water accumulation within the cabin and protects electronic components from moisture damage. Choosing a genuine OEM drain hose ensures proper routing, material flexibility, and resistance to clogging, maintaining a dry and healthy cabin environment.