6
7
WARNING!
• Install forward-facing only.
• DO NOT use anything to raise the child seat off of the
vehicle seat.
• Use the vehicle belt (not lower connectors) for harness
mode installations with children who weigh more than 40 lbs
(18.1 kg).
• The top tether MUST be used in harness mode for
children that weigh more than 65 lbs. Britax recommends
that the top tether be used at all times when installing the
child seat. Using the top tether will improve the stability of
your child seat and reduce the risk of injury.
General Information
Harness Mode
Booster Mode
• This child seat can be used in
booster mode with children who
weigh between 40 and 120 lbs
(18.1 and 54.4 kg) and stand
between 45 and 62 in. (114.3
and 157.5 cm) in height. Britax
recommends using booster mode
only once your child has outgrown
harness mode.
• This child seat cannot be in the
recline position when used in
booster mode.
• In booster mode, this child seat
can be positioned on the vehicle
seat using the LATCH system. Use
the vehicle’s lap-shoulder belt to
secure the child. Ensure that the
LATCH system does not interfere
with the vehicle belt function and
alignment when securing your
child.
WARNING!
• Position forward-facing
only in a seating position with a
lap-shoulder belt.
• Use
only the vehicle’s lap and shoulder belt system when
securing a child in booster mode.
Never secure a child
with a lap belt only in booster mode.
• Always secure the unoccupied child seat.
• If the lower anchors in your vehicle prevent proper vehicle
belt fit across your child you cannot use LATCH to position
this seat in booster mode. See below.
The vehicle belt fits properly
when the lap part sits low across
the child’s upper thighs (b) and
the shoulder part lies across the
center of the child’s chest and
does not contact the child’s neck
when routed through the upper
belt guide (a).
a
b
• Use this child seat in harness
mode with children at least 2 years
of age and who weigh between
25 and 90 lbs (11.3 – 40.8 kg) and
who stand between 30 and 58 in.
(76.2 – 147.3 cm) in height. Britax
recommends using harness mode
until your child outgrows its fit
requirements. See the Child Seat
Fit Recommendations section on
page 4 for more information.
• This seat may be used in either
the upright or recline position
in harness mode (see figures at
right).
Installing the Child Seat
Installing the Child Seat
Summary of Contents for FRONTIER 90
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