NFC Key Card Registration Process

Follow the below instruction to register NFC card key.

Both smart keys should be inside the vehicle for registration.
If only one smart key is in the vehicle, execute "Card Key Registration Mode Activation" on the diagnostic device, and register within 5 minutes.
Follow the below instruction depending on the number of the smart keys possessed.

Courtesy of HYUNDAI MOTOR AMERICA

NOTE:

"Register" feature is disabled, if there is a NFC card key already registered. Press "Delete" to remove the registered NFC card key, and register again. ("Delete" feature requires to have a smart key inside the vehicle.)
Card key "Register" and "Remove" could be done in multiple times. Although a new card key is registered, the old one could be registered again for the same vehicle.
Even if the IAU is replaced, the driver may still use already registered NFC card key.