See also:

Immobilizer System (with Advanced Key)
The immobilizer system allows the engine to start only with an advanced key the system recognizes. If someone attempts to start the engine with an unrecognized advanced key, the engine will not s ...

Keys (with Retractable Type 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. ...

Under the Hood
Mazda3 models now offer a choice of engines:   Standard  148-horsepower, 2.0-liter four-cylinder engine that teams with a five-speed manual or five-speed automatic transmission Opt ...