Download CAB Audio System Repair Manual 09 Hyundai Sonata SE – REPLACEMENT. 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad garnish (A) after pulling it by using regular screw driver (-). Take care of fixing clips (C). 3. Remove the center facia panel (B) after loosening the screws. Fig. 10: Identifying Crash Pad Garnish, Center Facia Panel And Clips Fig. 11: Identifying Connectors Fig. 12: Identifying Audio Unit Mounting Screws 6. Installation is the reverse of removal.