The Genuine BMW Upper Belt With Force Limiter Frnt Lft - 72118200861 is a safety component designed for use in BMW vehicles. It is located on the front left side of the vehicle and is responsible for securing the driver's upper body in the event of a collision or sudden stop. The belt is equipped with a force limiter mechanism, which helps to reduce the impact of the seatbelt on the driver's chest and torso. This helps to prevent serious injuries in the event of a crash. The upper belt is an essential part of the vehicle's safety system and should be regularly inspected and replaced if damaged.