Without Sensor Cover

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Loosen the screw.

Fig 1: Auto-Dimming Rearview Mirror And Screw
Courtesy of MAZDA MOTORS CORP.
Remove cover No. 1 in the direction of the arrow shown in the figure.

Fig 2: Removing Cover No. 1
Courtesy of MAZDA MOTORS CORP.
Detach the tabs while pressing cover No. 2 in the direction of the arrow (1) shown in the figure, then remove cover No. 2 in the direction of the arrow (2).

Fig 3: Pressing Cover No. 2
Courtesy of MAZDA MOTORS CORP.
Disconnect the auto-dimming rearview mirror connector.

Fig 4: Auto-Dimming Rearview Mirror Connector
Courtesy of MAZDA MOTORS CORP.
Remove the auto-dimming rearview mirror in the direction of arrow from the mirror base.

Fig 5: Removing Auto-Dimming Rearview Mirror
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.