Safety 1st onBoard 35 SecureTech User manual

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onBoard 35 SecureTechTM
Infant Car Seat
Your model may look dierent than one shown on cover.
Read all instructions BEFORE USING this car seat.
KEEP INSTRUCTIONS FOR FUTURE USE.
Failure to follow the warnings on the labels and in
the instruction manual can result in serious injury or
death to your child.
4358-8257 2.11.22
• Buckle Assembly
• Chest Clip
• Seat Pad Set
• Lower Anchor Belt
• Base
• Locking Clip
• Harness Straps
• Instructions
For parts availability and
questions, call, text, or chat.
If requested color is not
available, similar color will
be substituted.
Applicable tax and shipping
& handling will also be
added.
Replacement Parts List
(on select models)

Your child’s safety is
worth the time it will
take to read and follow
these instructions.
Ready? Let’s go!
Pages 1-8 will introduce
you to the parts of the car
seat.
The Back Cover of this
Manual has our
contact information.
If at any point you would
like assistance, please feel
free to reach out to us.
Welcome to the
Safety 1st Family!
Thank you for
choosing this car
seat, also known as
a child restraint!
To help you get
started using your
child’s new car seat,
here are the 4 main
tasks you’ll need to
complete.
Measure
Your Child
Install Car Seat
into Your Vehicle
Adjust Car Seat to
Fit Your Child
Secure Your Child
in Car Seat

©2022 Dorel Juvenile Group, Inc. Safety 1st
TM
and the Safety 1st logo and design are trademarks of Dorel Juvenile Group, Inc. [phone] www.safety1st.com.
Styles and colors may vary. Los estilos y los colores pueden variar. Made in CHINA. Hecho en CHINE. Distributed by (distribuido por) Dorel Juvenile Group, Inc., 2525
State St., Columbus, IN 47201-7494. Dorel Juvenile Canada, 2233 Argentia Road, Suite 110, Mississauga, ON L5N 2X7. Importado y Distribuido en Chile por: Comercial
e Industrial Silfa S.A. - San Ignacio 0201 / Parque Industrial Portezuelo Quilicura, Santiago Chile. Fono (562) 2339 9000. En Perú por: Comexa S.A. - Los Libertadores
455 – San Isidro, Lima – Perú. Fono (511) 4469014. En Centro América, Caribe y Ecuador por: Best Brands Group S.A. – Av. Balboa, Bay Mall Plaza, Planta Baja, local 9,
Panamá. - Fono: [phone]. En Colombia por: Baby Universe S.A.S. - Vía 40 No. 77-29, Barranquilla,Colombia - Fono: [phone] Importador:
DJGM, S.A. DE C.V. Gabriel Mancera No. 1041 Col. Del Valle, Benito Juárez C.P. 03100 México, Ciudad de México R.F.C. DJG140305GN9 Tel. (55)
67199202
Contents
1 Getting Started
1 Parts of Car Seat
4 Accessory Use
5 Canopy Use
7 Base Use
9 Rear-Facing Use
9 Car Seat Use
10 Rear-Facing
12 Rear-Facing Child Fit
14 Securing Child in Car Seat
17 Carrier Use
18 Vehicle Install with Base
47 Cleaning Parts of Car Seat &
Installing Seat Pad Set
48 Installing Harness System
53 LATCH & Vehicle Belt Information
53 LATCH: Lower Anchor Belt
55 Vehicle Belts
24 Attaching Car Seat to Installed Base
27 Removing Car Seat from Base
28 Vehicle Install without Base
33 Making Adjustments to Car Seat
33 Changing Harness Height
35 Changing Buckle Position
38 Harness System Adjustments
for Smaller Infants
42 Wash & Care
42 Removing Harness System
45 Removing Seat Pad Set
60 Safety Information
60 Child Restraint Use
61 Vehicle Seating Position
62 Installation in Vehicle
63 Replacement & Expiration
64 Registration & Safety Notices
65 Aircraft Information
66 Warranty

Harness Release Lever
(through opening in pad)
Harness Adjustment Strap
Body Pillow*
Harness System
*See page 4 for Accessory Use.
Rear-Facing
Level Line
Base
Canopy
Adjustable Base
(on select models)
Carry Handle
1 2
Parts of Car Seat
Chest Clip
Buckle
Harness Straps
Shoulder
Harness Slots
Your model may look dierent than one shown.
Base Release
Handle
Carry Handle
Adjustment
Button
Vehicle Belt
Path Guide
(when used
without the
base)
Head Pillow*

3 4
Accessory Use
Body Pillow
(on select models)
To remove, unbuckle the
harness. Pull the buckle
down through the slot in
the body pillow.
Slide it out from behind the
harness straps.
Head Pillow
(on select models)
When using the head
pillow, make sure it does
not cover your infant’s face
in any way.
To remove, from the back
of the head pillow gently
pull the fabric tabs out from
the shoulder harness slots.
To attach, slide the fabric
tabs into the shoulder
harness slots.
Base Belt Path
Lock Bars
Base
Alignment
Slots
LATCH:
Lower
Anchor Belt Base
Base
Release
Handle
Shoulder
Harness
Slots
Stroller
Attachment
Pins Harness
Strap
Splitter
Plate
Harness Adjustment
Strap
Buckle’s Metal Retainer
Instruction
Manual
Storage
Lockoff
Tension
Indicator

Undo Fastening
Strip on Back of
Car Seat
Locate Canopy Post
There is one on either
side of the car seat.
You only need to undo
one to remove the
canopy.
Pull Back
Canopy Fabric
to Locate Tab on
Canopy Post
Press Tab In With
Your Thumb &
Pull Canopy Hoop
Off Canopy Post
Slide Canopy
Fabric Off
Canopy Hoop
Reverse to put
back together.
5 6
1 2 3 4 5
To Remove Canopy
Canopy Use
To Adjust Canopy
Grasp the front or sides of the canopy hoop
and move it front to back to desired location.
Canopy Hoop
(plastic strip)
Canopy
(fabric)

7 8
Opening Release Lever
Lift the release lever to open the
Lockoff and to release the LATCH:
lower anchor belts.
Closing Release Lever
Push the release lever down to
close the Lockoff and to allow
the LATCH: lower anchor belts to
retract.
Tension Indicator
This base has indicators that show
when the LATCH: lower anchor belt
or vehicle belt have been securely
tightened.
The red will turn completely green
when tightened correctly. No red
should be showing.
This base has a release lever that
has two functions; one for LATCH:
lower anchor belts and one for
vehicle belts.
Lockoffs prevent the vehicle belt
from loosening after tightening.
Release Lever for Vehicle Belt Lockoff &
LATCH: Lower Anchor Belts
Base Use
To Lower Base Foot
Push in on the foot release
button and pull the foot all the
way down.
Lock the foot on the release
button as shown.
To Store Base Foot
Pull the foot down and press in on
the release button.
Push the foot up into the base to
the locked position.
Depending on your model, the base is adjustable.

In this car seat, your child can remain Rear-Facing
until they outgrow any one of the following:
• Weight Limit: 35 lb (15.9 kg); OR
• Height Limit: 32 in. (81.3 cm); OR
• Rear-Facing Child Fit requirements, see page 12.
Before installing the car seat in your vehicle, check your
child’s fit in the car seat.
This way you won’t have to redo the vehicle installation to
make adjustments to the car seat.
Rear-Facing Child Fit: Page 12
Rear-Facing Vehicle Install: Page 18
Rear-Facing
9 10
4-35 lb (1.8-15.9 kg) and 32 in. (81.3 cm) or less in height
Children under 1 year of age MUST ride Rear-Facing.
Your child’s height, weight, and age determine how the car
seat should be placed in the vehicle.
Children vary widely in body size, shape, and temperament—
please consult your doctor before switching between
any types or modes of a car seat within the limits and
fit requirements of the car seat.
State Laws
Please be certain to follow your state’s laws regarding car
seat use.
American Academy of Pediatrics
Recommendations
Infants and Toddlers
Should ride in a rear-facing car seat as long as possible, until
they reach the highest weight or height allowed by their car seat.
Toddlers and Preschoolers
Once they are facing forward, children should use a forward-
facing car seat with a harness for as long as possible, until they
reach the height and weight limits for their car seats.
School-Aged Children
Once they have outgrown their forward facing car seat, children
should use a belt-positioning booster seat until the vehicle’s
lap and shoulder seat belt fits properly. This is often when they
have reached at least 4 feet 9 inches in height and are 8 to 12
years old.
Older Children
All children younger than 13 years should be restrained in the
rear seats of vehicles for optimal protection.
Measure your child’s weight and height
(DO NOT guess) before using this car seat.
This car seat can only be used
REAR-FACING.
Car Seat Use
WARNING:

Your child’s bottom and
back should be flat against
the car seat.
Place Child in Car SeatUndo Chest Clip
& Buckle
It may be easier to undo
the buckle by pressing
in towards the top of the
button.
Fully Loosen
Harness Straps
Push down on the harness
release lever (through the
opening in the pad) while
pulling out on the harness
straps as shown.
1 2 3
Rear-Facing Child Fit
11 12
NEVER install a rear-
facing child restraint
in the front seat of a
vehicle equipped with
an active frontal airbag.
DO NOT use the lower anchor belt
along with the vehicle lap or lap/
shoulder belt.
DO NOT fasten multiple lower
anchor hooks on the same lower
anchor bar in the vehicle.
Check the vehicle belt or the lower
anchor belt before each use. Use
ONLY if the belt can be tightened
properly and locked securely in
place.
Even when unoccupied, this child
restraint MUST be firmly secured
to the vehicle with the lower anchor
belt or with the vehicle seat belt.
This child restraint MUST ALWAYS
face the rear of the vehicle.
WARNING:
continued on next page

13 14
Securing Child in Car Seat
Place Child in Car Seat
Your child’s bottom and back
should be flat against the car
seat.
Position the harness straps
over your child’s shoulders
and upper thighs.
Buckle Harness
Pull the harness straps up
to make sure the buckle is
locked.
Fasten Chest Clip
Insert right half of the chest
clip into the left half and
snap together.
Tighten Harness
Pull the harness adjustment
strap straight out to snugly
tighten the harness.
1 2 3 4
continued on next page
Check Buckle Position
• Use the slot closest to
your child.
• The buckle should
not be underneath or
behind your child.
1
2
3
Check Harness
Strap Position
The harness strap MUST
be at or slightly below
the shoulders; never
above.
Check Head Position
The top of your child’s head
MUST be at least 1 in.
(2.5 cm) below the top of
the car seat.
4 5 6
Buckle
Strap
Buckle To change the harness
strap height, see page
33.
To change the buckle
position, see page 35.
To learn how to check
harness tightness, see
pages 14-16.
If you cannot achieve
a snug harness fit for
your child, see pages
38-41.