| Mode | Weight | Height |
|---|---|---|
| Rear-facing harness | 5–40 lb | 19–40 in |
| Forward-facing harness | 30–65 lb | 34.4–49 in |
| Belt-positioning booster (high-back) | 40–100 lb | 43.4–52 in |
- Seat weight
- 14.75 lb
- Width
- Not published
- Usable life
- 10 years
- Aircraft
- Certified
Product images are not available right now.
Maxi-Cosi Kani 4-in-1 Convertible Car Seat
An all-in-one car seat with 4 modes: rear-facing harness 5 to 40 lb, 19 to 40 in; forward-facing harness 30 to 65 lb, 34.4 to 49 in; belt-positioning booster (high-back) 40 to 100 lb, 43.4 to 52 in; backless booster 40 to 100 lb, 43.4 to 57 in.
At a glance
- Fits children from 5 to 100 lb
- Up to 57 in tall
- 4 modes: rear-facing harness, forward-facing harness, belt-positioning booster (high-back), backless booster
- Seat weighs 23.2 lb
- 10-year usable life
- Certified for aircraft use
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Prices and purchase links will return when a fresh, eligible listing is available. The review and manufacturer sources remain available below.
Who the Kani 4-in-1 Convertible Car Seat fits
This seat covers 4 stages, and a child has to meet every limit of the stage they are in. Maxi-Cosi gives it a 10-year life from the date of manufacture, so check the date label before using a hand-me-down.
- Rear-facing harness5 to 40 lb · 19 to 40 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.
- Forward-facing harness30 to 65 lb · 34.4 to 49 in
- The child faces forward in the seat’s own harness. Use the top tether every time, and stay in the harness until the child outgrows it.
- Belt-positioning booster (high-back)40 to 100 lb · 43.4 to 52 in
- The seat’s own back and belt guide route the vehicle belt across the shoulder, and the sides give the child something to lean on when they sleep.
- Backless booster40 to 100 lb · 43.4 to 57 in
- Only the base is left, so the vehicle seat has to support the child’s back and head, and the belt guide sits at the hip.
What are the Kani 4-in-1 Convertible Car Seat weight, height and age limits?
| Mode | Child weight | Child height | Minimum age | Conditions |
|---|---|---|---|---|
| Rear-facing harness | 5 to 40 lb | 19 to 40 in | Not published | — |
| Forward-facing harness | 30 to 65 lb | 34.4 to 49 in | Not published | — |
| Belt-positioning booster (high-back) | 40 to 100 lb | 43.4 to 52 in | Not published | — |
| Backless booster | 40 to 100 lb | 43.4 to 57 in | Not published | — |
A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.
Kani 4-in-1 Convertible Car Seat specifications
- Seat weight
- 23.2 lb
- Width
- Not published
- Usable life
- 10 years
- Aircraft use
- Certified for aircraft (see manual for which modes)
- Recline positions
- 5
- Headrest positions
- 10
How the Kani 4-in-1 Convertible Car Seat installs
- Lower anchors
- 1-click LATCH. 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.
- Recline
- 5 recline positions. The recline angle is what keeps a young baby’s airway open, so set it before tightening the install.
- Harness
- 10-position no-rethread headrest/harness. 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?
Maxi-Cosi does not publish a width for this seat, so measure your back seat and compare it with the seat in a store before buying. It weighs 23.2 lb, which matters if you will move it between cars or carry it through an airport.
- 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 Kani 4-in-1 Convertible Car Seat have?
- 1-click LATCH
- 10-position no-rethread headrest/harness
- 5 recline positions
- Magnetic chest clip
- Converts to backless booster
Colors listed in the US
Caspian Caviar.
Is the Kani 4-in-1 Convertible Car Seat recalled?
No campaign in the current NHTSA child-restraint data names this model family, and I have not run a separate review for it. Check your seat’s model number and date of manufacture before use.
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.
- 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 Maxi-Cosi so you hear about the next one.
Sources
Other Maxi-Cosi convertible car seats
| Model | Top child weight | Seat weight | Width | Usable life |
|---|---|---|---|---|
| Kani 4-in-1 Convertible Car Seat (this seat) | 100 lb | 23.2 lb | — | 10 years |
| Sela All-in-One Convertible Car Seat | 100 lb | 27.25 lb | — | 10 years |
| Pria Max+ All-in-One Convertible Car Seat | 100 lb | 16.5 lb | — | 10 years |
| Pria Max All-in-One Convertible Car Seat | 100 lb | 16.8 lb | — | 10 years |
| Pria All-in-One Convertible Car Seat | 100 lb | 16.5 lb | — | 10 years |
| Petra All-in-One Convertible Car Seat | 100 lb | 14.75 lb | — | 10 years |
| Romi 2-in-1 Convertible Car Seat | 50 lb | 9.2 lb | — | 10 years |