The roof airbag is a sunroof-integrated airbag system developed by Hyundai Mobis for the first time in the world to minimize injuries to occupants in the event of a rollover. According to the North American traffic survey analysis, about 17% of occupants are thrown out of their vehicle in the event of a rollover. Hyundai Mobis paid attention to this and developed a roof airbag to ensure maximum safety for occupants. The roof airbag not only prevents occupants from escaping from the sunroof, but also reduces the risk of injury to major body parts such as the neck and head. The system determines whether the vehicle rolls over using the information delivered by the gyro sensor and acceleration sensor, and when a rollover is detected, the airbags stored in the roof or rear are deployed to the entire sunroof in 0.08 seconds. After deployment, it remains inflated for up to six seconds to protect the occupants.