The Genuine BMW Cover Rollover Protection Rear Left - 51437270487 is a protective cover designed specifically for the rear left side of BMW vehicles. It is part of the rollover protection system, which helps to protect passengers in the event of a rollover accident. This cover is made from high-quality materials and is an authentic BMW product. It is designed to fit seamlessly and securely over the rollover protection mechanism, providing an extra layer of protection and ensuring the system functions properly. This cover is a crucial component for ensuring the safety of passengers in a BMW vehicle.