The Genuine BMW Housing Microfilter Bottom Part - 64316989788 is a replacement part for the microfilter housing in BMW vehicles. It is designed to fit securely and seal the bottom of the microfilter housing, preventing any air or debris from entering the system. This part is made from high-quality materials and is an authentic BMW product, ensuring a perfect fit and reliable performance. It is an essential component for maintaining the air quality inside the vehicle and should be replaced if damaged or worn out. This bottom part is compatible with various BMW models and is a necessary component for proper functioning of the microfilter system.