The alarm in my 2008 Hyundai Tucson goes off 4 or 5 times a day for no apparent reason at all. Car can be unlocked or locked, the windows can be down or up, and it still goes off. Why is it doing this?
Is it happening in the same location every time, or does it happen anywhere? It could be being set off by some external source where it’s parked. Have a dealer check it for you.