How do you activate the security alarm on a Hyundai Sonata?

To activate the security alarm on a Hyundai Sonata, ensure all doors are closed and locked. Use the key fob to lock the doors; the alarm will be activated automatically within a few seconds. If you prefer, you can also manually lock the doors using the door lock switch inside the car, which will trigger the alarm system. To deactivate the alarm, simply unlock the doors using the key fob or the key.