The Genuine BMW Auxiliary Fan Assembly - 64548391882 is a replacement part for BMW vehicles. It is designed to help regulate the temperature of the engine by providing additional airflow. This assembly includes the fan motor, blades, and housing. It is a genuine OEM part, ensuring high quality and compatibility with BMW vehicles. It is suitable for models such as the 3 Series, 5 Series, and X3. This auxiliary fan assembly is essential for maintaining proper engine temperature and preventing overheating.