Genuine OEM Audi Cabin Air Filter, part number 1K1819653B. This essential filter is responsible for cleaning the air that enters the passenger cabin, removing dust, pollen, and other airborne pollutants. It ensures a healthier and more comfortable interior environment. Measuring 0.29 meters in length, 0.215 meters in width, and 0.06 meters in height, it fits precisely into the HVAC system. Choosing a genuine OEM filter guarantees the specified filtration efficiency and proper airflow, maintaining cabin air quality.