How do you unprogram garage door opener on a sonata?

To unprogram the garage door opener on a Hyundai Sonata, first, locate the HomeLink buttons on the overhead console. Press and hold the two outer buttons (the first and third buttons) simultaneously until the indicator light begins to flash, which may take about 20 seconds. This process clears all programmed devices. Finally, you can reprogram the opener if needed by following the manufacturer's instructions.