How do you reset anti-theft on 2007 Hyundai Elantra?

To reset the anti-theft system on a 2007 Hyundai Elantra, first ensure that the vehicle is unlocked and the key is in the "On" position without starting the engine. Then, disconnect the battery for about 10-15 minutes to reset the system. After reconnecting the battery, attempt to start the vehicle. If the anti-theft light remains on or the vehicle does not start, you may need to consult the owner's manual or a professional for further assistance.