If the engine fails to start, it may be flooded (excessive fuel in the engine).
Follow this procedure:
If the engine does not start within five seconds on the first try, wait ten seconds and try again.
Make sure the parking brake is on.
Depress the accelerator all the way and hold it there.
Depress the brake pedal, then press the push button start. If the engine starts, release the accelerator immediately because the engine will suddenly rev up.
If the engine fails to start, crank it without depressing the accelerator.
If the engine still does not start using the previous procedure, have your vehicle inspected by an Authorized Mazda Dealer.