Smart Key Unit

WARNING: This page is about a different car, the 2017 Hyundai Elantra. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative (-) battery terminal.
Remove the glove box.
(Refer to Body - "Glove Box Upper Cover Housing ")
Remove the smart key unit (A) after disconnecting the connectors (B) and loosening the bolt and nut.

Fig 1: Locating Smart Key Unit Connectors
Courtesy of HYUNDAI MOTOR AMERICA

Fig 2: Locating Smart Key Unit
Courtesy of HYUNDAI MOTOR AMERICA