Rear lights located both on the tailgate and body of the vehicle. The lights covers failed to remain adhered to the lights themselves and fell off and are partially adhered as a result of what appears to be a failure of the adhesion material . Two light covers may have been lost while driving. Unknown if their loss resulted in damage(s) to others. Without the outer cover results in the exposure of the lights to weather and potential failure. Review with Toyota of Orange service manager confirm the failure of adhesive/ manufacturing process of the lights