The Genuine BMW Housing Microfilter Upper Section Left - 64316958815 is a component used in the air filtration system of BMW vehicles. It is designed to fit on the left side of the microfilter housing and is used to secure the microfilter in place. This housing section is made of high-quality materials to ensure durability and proper function. It is an authentic BMW part, ensuring a perfect fit and compatibility with your vehicle. This upper section is specifically designed for the microfilter on the left side and is not interchangeable with the right side. It is an essential component for maintaining clean and fresh air inside your BMW.