Hi All,
I have a 2012 Mazda3 hatch, auto, and every couple of months it will suddenly start making a warning tone from somewhere in the dash. Note this is not the usual Mazda chime that warns of doors/lights/seatbelts etc.

Instead it sounds like an electronic timer (beep or buzzer), 2 to 3 beeps per second, and lasts for about a minute then stops. No warning lights on the dash or the info display, and the car continues to drive normally. Sounds just like an alarm clock is hidden in the dash somewhere...

I've had the car 8 months, and it has made this sound 3 times, each at different times of the day and driving conditions. Mazda dealer doesn't have any ideas...

Any thoughts from the collective minds?