With Forward Sensing Camera (FSC)

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the sensor cover. (See SENSOR COVER REMOVAL/INSTALLATION .)
Disconnect the connector.

Fig 1: Removing Vehicle Sensor Cover
Courtesy of MAZDA MOTORS CORP.
Insert the remover tool into the gap between the rain sensor and the stopper pin.

Fig 2: Inserting Remover Tool Gap Between Rain Sensor And Stopper Pin
Courtesy of MAZDA MOTORS CORP.
Move the remover tool in the directions of arrows (1) and (2) shown in the figure and detach the stopper pin.
Move the rain sensor in the direction of arrow (1) shown in the figure and pull out the rain sensor from the bracket.

Fig 3: Pulling Out Rain Sensor From Bracket
Courtesy of MAZDA MOTORS CORP.
Peel off the rain sensor sheet from the rain sensor.

Fig 4: Peeling Off Rain Sensor Sheet
Courtesy of MAZDA MOTORS CORP.