In an adustable rear-view mirror apparatus for a road vehicle, the mirror has drive means for rotating the mirror to an angle determined by a control signal thereto. The drive means comprises an output gear, for example an arcuate gear (6) driven by a drive gear rotated by a motor (11), the motor (11) and the drive gear being mounted in such a manner as to bias the drive gear, for example a worm gear (9) into engagement with the output gear while allowing separation of the gears when a predetermined loading on the gears is exceeded. The drive gear can be carried by a leaf spring which can be the circuit board (7) carrying electronic control components.
