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. ...

Seat Belt Warning Light/Beep
The seat belt warning light illuminates and a beep sound will be heard if the driver's seat belt is not fastened when the ignition switch is turned to the ON position. Conditions of operation ...

Trailer Towing
The Mazda3 is not designed for towing. Never tow a trailer with your Mazda3. ...