Genuine OEM BMW Activated Carbon Cabin Air Filter, part number 64106907746. This filter is responsible for cleaning the air that enters the vehicle's cabin, removing dust, pollen, and other airborne particles. It is positioned within the HVAC system. The filter utilizes activated carbon to effectively absorb odors and pollutants. Genuine OEM filters are manufactured to exact specifications, ensuring proper airflow and filtration efficiency for a clean cabin environment.