For the 2006 Hyundai Sonata, the supplied fitment data lists an H1 bulb for the high-beam headlight. No low-beam bulb is specified in the available data, so verify the low-beam application before ordering a replacement. The fog lights use 881 bulbs.
Other notable exterior applications include 2357A bulbs for the front turn signals, parking lights, and front side markers. The rear turn signals use 1156A bulbs, while the tail lights and brake lights use 2357R. The reverse lights and center high-mounted stop light both use 921 bulbs.
License plate lighting may use either 168 or 917, so check the existing bulb and socket when replacing it. Rear side markers use 168NA. Interior applications include 6418 bulbs for the courtesy, dome, and trunk lights, while map lights may use 194 or 7441. Confirm the original bulb where multiple options are listed.