Maxi-Cosi Kani 4-in-1 Infant Kids Convertible Car Seat, Rear-Facing Forward-Facing Carseat, Booster, Slim Fit, Magnetic Buckle, 5-Position Recline, Fits 5-100 lbs, 19-57 in, Caspian Caviar
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Availability:
In Stock.
Arrives
Thursday, Aug 6
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Features
- KANI 4-IN-1 CONVERTIBLE CAR SEAT 4 modes of use: rear-facing infant car seat (540 lbs., 19"40"), forward facing car seat (3065 lbs., 34.4"49"), belt-positioning booster (40100 lbs., 43.4"52"), backless booster car seat (40100 lbs., 43.4"57")
- PERFECT FOR GROWING FAMILIES Our convertible car seats for babies and kids feature a space-saving slim design that makes more room in the back seat
- FEATURING ECOCARE Our baby car seat features premium, future-friendly, 100%-recycled fabric made from plastic bottles. The yarn is soft, comfortable and breathableperfect for your little one. All car seat fabrics are machine-washable and dryer-safe
- PREMIUM CAR SEAT FABRICS FOR LITTLE ONES COMFORT Our ultra-soft, yet durable, PureCosi fabrics and padding of this infant to toddler car seat are made without added fire retardant treatment, which is better for your child and our planet
- EASY IN-AND-OUT ClipQuik is our magnetic chest clip on the booster seat that you can open 1-handed for easier buckling and unbuckling
- 1-HANDED CONVENIENCE AND EASE OF USE QuikFit is our integrated headrest and harness system on this grow with me car seat that adjust easily without rethreading the harness and offers 10 positions to support all growth stages
- DESIGNED TO MAKE TRANSITIONS SWIFT AND SIMPLE ReclineFit provides 5 reclining positions you can change 1-handed for little ones comfort and a secure fit in your car. Intuitive 1-hand release converts this all in one car seat into a backless booster
- IMPORTANT SAFETY INFORMATION Engineered and tested to meet or exceed federal safety standards. Meets federal Side Impact standard. Actual fit may vary. Not all children will comfortably fit in the travel car seat for the full weight and height ranges
- ADDITIONAL INFANT TO TODDLER CAR SEAT FEATURES YOULL LOVE Vegan leather accents on the baby carseat cover, and the 2 easy-to-clean, removable BPA-free cup holders. 1-click LATCH connectors for easier installation
Description
The Maxi-Cosi Kani 4-in-1 Convertible Car Seat is designed to be your child’s car seat from the first ride home from the hospital through the big kid booster stage. This all-in-one car seat has 4 modes: rear facing car seat (5–40 lbs., 19"–40"), forward-facing carseat (30–65 lbs., 34.4"–49"), belt- positioning booster seat (40–100 lbs., 43.4"–52"), and backless booster seat for car (40–100 lbs., 43.4"–57"). Parents love Kani’s slim car seat design, which is perfect for growing families. Getting your little one in and out of the car is quick and simple with ClipQuik, our magnetic chest clip that opens with 1 hand. Key to the design of our toddler carseats are the premium fabrics. EcoCare is future-friendly, 100% recycled fabric made from plastic bottles. The yarn produced is soft, comfortable, and breathable. All fabrics are machine-washable and dryer-safe. When your little one reaches the big kid stage, an intuitive 1-hand release converts this all-in-one into a backless booster in seconds. Engineered and tested to meet or exceed federal safety standards. Meets federal Side Impact standard. Actual fit may vary. Not all children will comfortably fit in the car seat for the full weight and height ranges listed.
Maximum Weight Recommendation: 100 pounds
Installation Type: Seatbelt, Latch
Orientation: Forward Facing, Rear Facing
Harness Type: 5-Point
Number of Height Positions: 10
Brand: Maxi-Cosi
Age Range Description: Infant
UPC: 884392009236
Manufacturer: Dorel Juvenile Group
Unit Count: 1 Count
Model Number: CC430HHK
Part Number: CC430HHK
Item Dimensions D x W x H: 29"D x 19"W x 29"H
Item Weight: 23.2 pounds
Material Type: Polyester
Color: Caspian Caviar
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Aug 6
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Pros: The relief of not having to buy another car seat. Yes, it's a little complicated, but I'll literally have years to become a master at using it. It's comfortable (or, rather, I'll take the lack of complaints from the occupant as evidence it's comfortable). It looks great, as much as a car seat can, and I also like now Maxi-Cosi takes a clean and chemical-free approach to their fabric. The fabric is also machine washable, which is kind of a no brainer and not being able to easily clean a seat you'll be using for years would be a big deal breaker. Most importantly, it seems very safe. Rock solid and secure when it's strapped in and it's not easy to accidentally loosen anything. Neutral: Strapping the kid in seems take a bit longer than it should. Cons: Probably because it's a fairly complicated convertible seat, I found installation to be a little painful and time consuming. And looking through the manual at the steps to convert it to a booster gave me a sympathy pang for the work future me will have to do. Saving money comes at the expense of doing a little work.
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Reviewed in the United States on July 7, 2026 by Reviewer
This car seat has it all! It is ready to go from day one to young toddlers! Currently my 18 month old son is using it and I'm eventually going to change it to be a front facing orientation as he is starting to get tall and his feet are going to eventually get cramped. The nice thing about this car seat is it converts into a booster seat for when your child no longer needs to be strapped into the seat. I'm really pleased with this car seat. It looks really sturdy and comfortable and my son hasn't ever complained about being put in it.
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Reviewed in the United States on April 29, 2026 by Richard Surber
This car seat is beautiful but honestly not my favorite. The setup wasn't easy. Took a while to go through the manual and make sure everything was correct. For reference, I also have a Graco slim fit 3 in 1, and that was a piece of cake compared to this. The button at the base of the seat that allows you to pull the straps to loosen them is not easy to find or push in to loosen the straps. The straps get twisted very easily when trying to buckle baby in. Another thing, there’s no level indicator besides a line on the side of the seat, and it is not easy to tell if it’s level based on that. I know it’s cute but save some money and go practical! I wish I had.
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Reviewed in the United States on March 14, 2026 by Kelsey
I absolutely love that this car seat is chemical free - that is the main reason that we stick with maxi cosi. The seat is wide, comfortable and my child seems to like it a lot better than her infant car seat. The magnet clip and the release button do take a couple tries to get used to, but overall we love it!
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Reviewed in the United States on February 26, 2026 by Angelina C
This is a very nice, secure and safe car seat. It will accommodate my grandbaby as he grows. We currently have it set with all of the cushions to accommodate our 5-month-old. Over time we can remove some of those cushions to accommodate his growth, without having to buy new seats. We're currently using it in the rear-facing mode. The harness is very secure. Right now with the baby being bundled up in a jacket and layers, it takes a minute to get him strapped in. I think it would be easier to connect his harness if I first released it to lengthen the straps. The seat is well padded, and though he fusses as it takes a minute to get him strapped in, he then quickly settles down and seems very comfortable. He frequently falls asleep in the car seat Several things to be aware of: - The initial setup wasn't very easy. Partly because this seat can be used in different ways (rear-facing, forward facing, booster, etc ), the manual is pretty thick and thus takes more time to understand and get it set up correctly. - There is a release button at the base of the seat that allows you to pull the straps to loosen them. But the button is not particularly easy to find or depress in order to loosen the straps. - There is also a button that releases the harness clasp, allowing you to take the baby out of the car seat. It is situated low near the seat and is probably intentionally a little bit hard to depress in order to avoid accidental release. Just be aware that it's not just an easy push and release button.
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Reviewed in the United States on February 14, 2026 by Ron Cazier
This is a really great convertible car seat that’s designed to grow with your child. It goes from infant to forward-facing and all the way to a booster (around 7–8 years old, depending on height and weight), which is a huge plus because you don’t have to keep buying new car seats at every stage. It truly covers everything in one seat. I needed a seat for a second car I’m starting to use more often, and this option made a lot of sense since it covers multiple stages. It feels like a smart long-term purchase rather than something you’ll outgrow quickly and need to replace. It has some really nice, thoughtful features, like a magnetic buckle that’s designed to make clipping in easier, two cup holders (because one is never enough), and machine-washable fabric, which is a huge plus for a seat that gets used every day. The only thing I wish it had is anchors in booster mode. It’s not a dealbreaker at all, but it would make an already great seat feel completely top-notch. Overall, this car seat feels really well thought out and convenient for everyday use. It’s made by a reputable brand, which gives you that extra peace of mind when it comes to safety, and its a great value being you won't need another car seat again!
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Reviewed in the United States on January 16, 2026 by Emy
This car seat is engineered for optimal space efficiency, fitting seamlessly in the back seat of my Honda CRV. I can accommodate two other grandchildren on either side of the car seat, which is securely positioned in the middle seat. The installation process was straightforward and secure. I still opted to have it inspected at my local police station to ensure it was installed correctly. This is the 4-in-1 car seat that begins in a rear-facing position for up to one year, transitions to forward-facing, then shifts to a high back booster seat, and ultimately converts to a backless booster seat. Having one car seat that serves all these stages is remarkable and conserves both time and money. The fabric is soft, ensuring that the baby is very comfortable.
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Reviewed in the United States on February 9, 2026 by Customer Review
I need to start by saying I LOVE maxi cosi products. They’re a premium product but cheaper than some of their competition. I have had multiple maxi cosi car seats and booster seats but never this kani version. I was excited about this one particularly because it can convert to booster with or without a back. Unrelated to safety, the color way is right up my alley. I love the black with the leather derailed cup holders-it’s so cute and high end! Here’s my feedback tho. My child isn’t infant size anymore. We’re on our last bit of car seat, about to enter booster seat stage so I set this up as an infant seat and then went through every single conversion and I gotta be honest…the conversions aren’t the best. As an infant or baby car seat? INCREDIBLE! So cushy and beautiful and feels so sturdy and safe. One you take this apart and start doing all the conversions you might want to scream. First step was the backed booster-I did all that work and it’s SO HEAVY AND BULKY. Once I got it in, the base still angles and adjusts like a car seat does and I couldn’t get it to sit flush and upright. It almost felt unsafe based on what my other high backed boosters typically look like once they’re installed. I decided to take the back off and go for the backless conversion and that also was not my favorite. Once I swapped the cup holders around and got the dang cover situated I realized the back free booster option has no anchors! Idk about you all but I want my boosters anchored into the vehicle. The directions say to strap and clip the seatbelt when there’s no child in the boosters to keep them from becoming projectiles and honestly….what? Even if it’s acceptable I don’t feel safe without anchors. I reconstructed this back to a car seat and we will ride out our remaining car seat years in it and then purchase a legitimate maxi cosi booster when the time comes.
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Reviewed in the United States on October 31, 2025 by Chelsie