Disconnect the battery negative cable, and wait for at least thirty seconds before beginning work.
To remove the emergency fastening device (C), keep on pushing the lock pin (A) as arrow direction. And then remove the seat belt after pushing the lock pin (B).
Remove the center pillar lower trim.
(Refer to Body - "Center pillar trim")
Disconnect the emergency fastening device connector (A).
Loosen the mounting bolt (B) and then remove the emergency fastening device.