With Forward Sensing Camera (FSC)

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the sensor cover. (See SENSOR COVER REMOVAL/INSTALLATION .)
Disconnect the auto-dimming mirror connector.

Fig 1: Disconnecting Auto-Dimming Mirror Connector
Courtesy of MAZDA MOTORS CORP.
Remove the screw.

Fig 2: Removing Screw
Courtesy of MAZDA MOTORS CORP.
Remove the auto-dimming mirror in the direction of the arrow shown in the figure.

Fig 3: Removing Auto-Dimming Mirror
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.