WARNING: This page is about a different car, the 2020 Hyundai Santa Fe. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the negative (-) battery terminal.
Remove the center air vent duct (A).
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Remove the center speaker (A).
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Separate the audio head unit (A) from crash pad after loosening the screws.
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Courtesy of HYUNDAI MOTOR AMERICA
Remove the audio head unit after disconnecting the connectors and cable.