Genuine OEM Audi Heater Blower Fan, part number 5Q1819021G. This essential component is responsible for circulating conditioned air throughout the vehicle's cabin, providing airflow for the heating, ventilation, and air conditioning (HVAC) system. It draws air from outside or recirculates cabin air, pushing it through the heater core or evaporator. Designed for Left-Hand Drive (LHD) vehicle configurations, this blower fan assembly weighs approximately 1.275 kg. Installing a genuine OEM blower fan ensures quiet operation, correct airflow volume, and electrical compatibility with the vehicle's climate control system, preventing issues like inadequate heating or cooling.