Genuine BMW Air Bag Module Left (X3) - 72127311663: Genuine BMW Air Bag Module Left (X3) - 72127311663 is an OEM replacement part designed to provide safety and protection for the occupants of the BMW X3. It is a direct replacement for the original part and is designed to meet or exceed the manufacturer's specifications. It is an essential component for the airbag system in the vehicle and must be installed correctly for proper operation.