The Genuine BMW Housing Microfilter Lower Section Left - 64316958817 is a component used in the filtration system of a BMW vehicle. It is located on the lower left side of the housing and is responsible for filtering out dust, pollen, and other contaminants from the air entering the vehicle's cabin. This product is a genuine BMW part, ensuring high quality and compatibility with the vehicle. It is designed to fit perfectly and function effectively, providing clean and fresh air for the occupants of the vehicle.