Mazda CX-3 Owner's Manual page 28

Essential Safety Equipment
Seats
Removal/Installation
To remove the head restraint, pull it up
while pressing the stop-catch.
To install the head restraint, insert the legs
into the holes while pressing the stop-
catch.
WARNING
Always drive with the head restraints
installed when seats are being used and
make sure they are properly installed:
Driving with the head restraints not
installed is dangerous. With no support
behind your head, your neck could be
seriously injured in a collision.
After installing a head restraint, try
lifting it to make sure that it does not
pull out:
Driving with an unsecured head
restraint is dangerous as the
effectiveness of the head restraint will
be compromised which could cause it to
unexpectedly detach from the seat.
2–14
CAUTION
When installing a head restraint,
   
make sure that it is installed
correctly with the front of the head
restraint facing forward. If the head
restraint is installed incorrectly, it
could detach from the seat during a
collision and result in injury.
The head restraints on each of the
   
front and rear seats are specialized
to each seat. Do not switch around
the head restraint positions. If a head
restraint is not installed to its correct
seat position, the effectiveness of the
head restraint during a collision will
be compromised which could cause
injury.