See also:

Keys (without Advanced Key)
WARNING: Do not leave the key in your vehicle with children and keep them in a place where your children will not find or play with them: Leaving children in a vehicle with the key is dangerous. ...

Child Restraint Precautions
Mazda strongly urges the use of child-restraint systems for children small enough to use them. You are required by law to use a child-restraint system for children in the U.S. and Canada. Check ...

Safety
Side curtain airbags and seat-mounted side-impact airbags are standard in all Mazda6 models, as are antilock brakes and traction control. ...