Mazda 3 Owners Manual: Liftgate/Trunk Lid
WARNING Never allow a person to ride in the luggage compartment/trunk: Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open: Exhaust gas in the cabin of a vehicle is dangerous. An open liftgate/trunk lid in a moving vehicle will cause exhaust gas to be drawn into the cabin. This gas contains CO (carbon monoxide), which is colorless, odorless, and highly poisonous, and it can cause loss of consciousness and death. Moreover, an open liftgate/trunk lid could cause occupants to fall out in an accident.
Do not stack or leave loaded luggage unsecured in the luggage compartment: Otherwise, the luggage may move or collapse, resulting in injury or an accident. In addition, do not load luggage higher than the seatbacks. It may aff ect the side or rear fi eld of view.