| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness (infant carrier) | 4–30 lb | Up to 32 in |
- Seat weight
- 7.5 lb
- Width
- Not published
- Usable life
- 8 years
- Aircraft
- Certified
Product images are not available right now.
Safety 1st onBoard FLX Infant Car Seat
An infant car seat with one mode: rear-facing harness (infant carrier) 4 to 30 lb, up to 32 in.
At a glance
- Fits children from 4 to 30 lb
- Up to 32 in tall
- Rear-facing harness (infant carrier) only
- 8-year usable life
- Certified for aircraft use
Shopping links paused for a recall check
NHTSA lists a campaign naming this model family (23C002000). I pause shopping links until I have read the campaign and checked which build dates it covers.
Who the onBoard FLX Infant Car Seat fits
This seat covers one stage. Safety 1st gives it a 8-year life from the date of manufacture, so check the date label before using a hand-me-down.
- Rear-facing harness (infant carrier)4 to 30 lb · Up to 32 in
- The child faces the back of the car, which keeps the head, neck and spine supported in a frontal crash. Keep this mode as long as the child fits it.
What are the onBoard FLX Infant Car Seat weight, height and age limits?
| Mode | Child weight | Child height | Minimum age | Conditions |
|---|---|---|---|---|
| Rear-facing harness (infant carrier) | 4 to 30 lb | Up to 32 in | Not published | Rear-facing only |
A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.
onBoard FLX Infant Car Seat specifications
- Seat weight
- Not published
- Width
- Not published
- Usable life
- 8 years
- Aircraft use
- Certified for aircraft (see manual for which modes)
- Harness positions
- 4
- Seat weight statement
- under 8 lbs.
How the onBoard FLX Infant Car Seat installs
- Lower anchors
- LATCH-equipped (base). Check your vehicle manual for which seating positions have anchors, and switch to the seat belt once the child passes the anchor weight limit in the manual.
- Harness
- 4 harness heights. Check the harness height at each growth spurt: at or below the shoulders rear-facing, at or above them forward-facing.
Every install is a fit between one seat and one vehicle. Read both manuals, and use a free inspection station if anything is unclear.
Will it fit your car?
Safety 1st does not publish a width for this seat, so measure your back seat and compare it with the seat in a store before buying.
- Check your vehicle manual for lower anchor positions and any head-restraint rules.
- Rear-facing seats need front-seat room: try the install behind the driver before you commit.
- Certified for aircraft use, so it can travel as a seat rather than checked baggage.
What features does the onBoard FLX Infant Car Seat have?
- LATCH-equipped (base)
- Adjustable base
- 4 harness heights
- Baseless (belt) installation
Colors listed in the US
Monument, Lake Blue, Wisteria Lane, Old Soul.
Is the onBoard FLX Infant Car Seat recalled?
NHTSA currently lists one campaign naming this Safety 1st family: 23C002000. A campaign names a family, not always every build, so check your seat’s model number and date of manufacture against the campaign itself.
I have not reviewed these campaigns for this model yet, so shopping links stay paused here.
Before you buy
- Weigh and measure your child. The limits above are the manufacturer’s, and a child has to meet all of them for the mode they will use.
- Confirm the exact version. Colors, retail exclusives and model numbers change limits more often than you would expect; Safety 1st lists 4 colors of this seat.
- Read the manual before you buy, not after. It is linked above and holds the fit rules, the install methods and the expiry.
- Check recalls by model number and date of manufacture, and register the seat with Safety 1st so you hear about the next one.
Sources
Other Safety 1st infant car seats
| Model | Top child weight | Seat weight | Width | Usable life |
|---|---|---|---|---|
| onBoard FLX Infant Car Seat (this seat) | 30 lb | — | — | 8 years |
| onBoard Insta-LATCH DLX Infant Car Seat | 30 lb | 7.5 lb | — | 8 years |
| onBoard Insta-LATCH Infant Car Seat | 30 lb | — | — | — |
| onBoard Slide DLX Infant Car Seat featuring SafetySlide Base | 30 lb | — | — | 8 years |
| onBoard Slide Infant Car Seat featuring SafetySlide Base | 30 lb | — | — | 8 years |
| Dreamride Infant Car Bed | 20 lb | — | — | 8 years |
| Light 'n Comfy Infant Car Seat | 30 lb | — | — | 8 years |
| onBoard LTX Infant Car Seat | 30 lb | — | — | — |