Mazda 3 2019 Owner's Manual page 52

Essential Safety Equipment
Child Restraint
Due to variations in the design of

child-restraint systems, vehicle seats
and seat belts, all child-restraint systems
may not fit all seating positions. Before
purchasing a child-restraint system, it
should be tested in the specific vehicle
seating position (or positions) where it
is intended to be used. If a previously
purchased child-restraint system does
not fit, you may need to purchase a
different one that will.
Infant seat
An infant seat provides restraint by
bracing the infant's head, neck and back
against the seating surface.
Equal to Group 0 and 0 of the UN-R 44
and UN-R 129 regulation.
Child seat
A child seat restrains a child's body using
the harness.
Equal to Group 1 of the UN-R 44 and
UN-R 129 regulation.
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Booster seat
A booster seat is a child restraint
accessory designed to improve the fit of
the seat belt system around the child's
body.
Equal to Group 2 and 3 of the UN-R 44
and UN-R 129 regulation.
1. Full booster seat
2. Backless booster seat
When using a backless booster seat,
always install the vehicle head restraint to
the seat where the backless booster seat is
installed.