The Hyundai Sonata comes equipped with a keyless-entry remote-control key fob that allows you to unlock your doors and trunk from a distance, just by hitting a button. Occasionally, you will have to reprogram the remote in order to re-sync the signal to your car’s transmitter device. Reprogramming may be necessary if your remote control’s battery goes out or if your remote malfunctions. Luckily, reprogramming your Hyundai Sonata’s keyless entry remote is rather simple.
Sit inside your Sonata while holding your remote-control key fob in your hand. Close the door behind you.