SEA uses the BSM (Blind Spot Monitor) to detect vehicles (including bicycles) approaching from the rear when exiting the vehicle. If SEA determines a collision with an opened door or exiting occupants is a possibility, an indicator in the door mirror lights up to alert occupants. If there is the possibility of a collision when the door is opened, or while the door is open, occupants are alerted by flashing indicators in the door mirror, the multi-information display, the buzzer, and voice notification.