The Genuine BMW Upper Belt W-O Force Limiter Frnt Lft is a replacement part for the front left upper seat belt in BMW vehicles. It is designed to be used without a force limiter, which is a safety feature that limits the force applied to the seat belt in the event of a collision. This product is made by BMW and is an authentic, high-quality replacement for the original part. It is compatible with various BMW models and is intended to ensure proper functioning and safety of the seat belt system.