Mazda 3 Owner's Manual page 54

Essential Safety Equipment
Child Restraint
WARNING
Always remove the head restraint and
set the tether strap:
Routing the tether strap on top of
the head restraint is dangerous. In a
collision the tether strap could slide off
the head restraint and loosen the child-
restraint system. The child-restraint
system could move which may result in
death or injury to the child.
(Saloon)
Anchor bracket
(Hatchback)
Tether strap
Forward
2–38
Tether strap
WARNING
Always install the head restraint and
adjust it to the appropriate position
after removing the child-restraint
system:
Driving with the head restraint
removed is dangerous as impact to the
occupant's head cannot be prevented
during emergency braking or in a
collision, which could result in a
serious accident, injury or death.
Refer to Head Restraints on page 2-11 .