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Kani 4-in-1 Convertible Car Seat

Maxi-Cosi®

Current Price $379.99
Color
Color: Caspian Caviar
One Size
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Details & care

Now there is one car seat for every age and every stage of your kid's journey that begins with the welcome home ride from the hospital through to graduation from booster seat to 'big kid' status.

Why parents will love it: Save time, money and aggravation with this 4-in-1 car seat that converts as needed as your baby grows from infant to autonomous auto passenger. The Kani features a slim design—so slim that you can install three across most back seats—perfect for growing families, in both senses. One-hand adjustments, a no rethread harness and the ClipQuik™ magnetic chest clip make getting kids in and out of the car quick and easy.

Why kids will love it: Luxury comfort and convenience in every configuration keeps kids ever-happy travelers, with features such as a 10-position headrest, a 5-position ReclineFit adjustable base, cupholders and snack holders and machine-washable fabrics for easily refreshed rides. The booster seat can be used with or without a back.

Child weight/height: 5–40 lb., 19”–40” (rear-facing car seat); 30–65 lb., 34.4”–49” (front-facing car seat); 40–100 lb., 43.4”–57” (backless booster seat).

Car seat weight/dimensions: 23.2 lb. fully assembled car seat, 23.5"–29” x 19.25"–30.25” x 23.25”–29" seat dimensions.

Safety features: Engineered and tested to meet or exceed federal safety standards; meets federal side-impact standard.

Harness: No rethread with ClipQuik magnetic chest clip.

Car installation: One-click LATCH installation.

This item is eligible for return in its original, unopened box only.

  • PureCosi EcoCare recycled fabrics are wool-free and without added fire-retardant treatment
  • Removable fabric is machine washable and dryer safe
  • Cupholders and snack cups are dishwasher safe
  • Steel/plastic/textile
  • Imported
  • Item #11030200
  • Core Product ID 3333343JRP

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Maxi-Cosi®

Maxi-Cosi® specializes in ultrareliable car seats and strollers that consistently excel in safety, comfort and ease of use. The company's products solve problems that matter to parents—while looking great and feeling wonderful. Maxi-Cosi's commitment to continuous innovation and breakthrough technology results in smart and caring travel solutions that help families relax and enjoy their time together.

Reviews

(27)274.6 out of 5
Write a Review

Most helpful positive review

Nov 4, 2025

Carseat is butter soft and ultra comfortable

[This review was collected as part of a promotion.] I was given this car seat to try as part of the Stellar Product Testing Panel. This is the Kani 4 in 1. The materials are ultra soft like you would expect from Maxi Cosi. I bought the Maxi Cosi Pria 85 for my oldest child back in 2018, so this is a nice updated version we're using for my littlest addition. I love the slim design that fits my little sedan, even with another carseat in the back. It's roomy enough for them to use for years and years. One of my favorite parts of the carseat is the magnetic buckle closure. It takes a bit to get used to if you're not used to that kind of feature. I really can't say enough how soft the material is and it feels easy to clean. Another great feature is two cup holders, one we use for water and another we use for a cup of snacks. The crevaces in the carseat make it easy to vacuum out those said snacks. I love the black color which is sure to hide stains really well, unlike my other grey carseat. The buckle also feels very secure. The only drawback to this carseat that I can possibly see is that it's relatively heavy, but it's also feeling much sturdier than my other carseat. I'd feel comfortable bringing this on an airplane and have them handle it, unlike my other one from a different brand. The overall value is top notch right here. This is a carseat that is built to last for all ages. It goes without saying that the carseat manual is easy to read, so installation is a breeze, even for a first time parent. I am glad we have this!
Maggie
Reposted from doreljuvenile-maxicosi

Most helpful critical review

Oct 26, 2025

Beautiful but

[This review was collected as part of a promotion.] I recieved this car seat as a part of stellar product testing panel. This is a gorgeous car seat let me begin with that the smooth black with leather lining is so beautiful! I was a bit worried because the box says the seat is slim however it looked huge and I was wondering how this would fit in my Honda civic. I honestly dreaded thinking it would take up so much space. However with the easy seatbelt installation and recline the seat took up very minimal slack which is so important to me. Now where my review takes a turn is 1. I lost the instruction manual and could not find a maxi cosi verified manual video online. I am a visual leaner and I typically like to follow videos while I install and I found nothing but one video from a personal channel of a YouTuber. 2 I hate that I cannot figure out how to loosen up the straps. Most car seats have a huge button at the bottom to press but this one is so small and hard to find. It’s so difficult to loosen the straps which I do everytime I take my baby out of his car seat. My last issue with the car seat is that it is made of recycled plastic which is great but after doing much research on how micro plastics are affecting our bodies it worries me placing my baby on this seat long term. I still have a bit more to learn about the car seat but for now I will give it a solid 3 stars. My baby was pretty content after he got comfortable. I do also love the two cupholders in the front they will surely come in handy on long road trips !
Kadavis
Reposted from doreljuvenile-maxicosi

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5 stars67%
4 stars30%
3 stars4%
2 stars0%
1 star0%
Nov 4, 2025

Carseat is butter soft and ultra comfortable

[This review was collected as part of a promotion.] I was given this car seat to try as part of the Stellar Product Testing Panel. This is the Kani 4 in 1. The materials are ultra soft like you would expect from Maxi Cosi. I bought the Maxi Cosi Pria 85 for my oldest child back in 2018, so this is a nice updated version we're using for my littlest addition. I love the slim design that fits my little sedan, even with another carseat in the back. It's roomy enough for them to use for years and years. One of my favorite parts of the carseat is the magnetic buckle closure. It takes a bit to get used to if you're not used to that kind of feature. I really can't say enough how soft the material is and it feels easy to clean. Another great feature is two cup holders, one we use for water and another we use for a cup of snacks. The crevaces in the carseat make it easy to vacuum out those said snacks. I love the black color which is sure to hide stains really well, unlike my other grey carseat. The buckle also feels very secure. The only drawback to this carseat that I can possibly see is that it's relatively heavy, but it's also feeling much sturdier than my other carseat. I'd feel comfortable bringing this on an airplane and have them handle it, unlike my other one from a different brand. The overall value is top notch right here. This is a carseat that is built to last for all ages. It goes without saying that the carseat manual is easy to read, so installation is a breeze, even for a first time parent. I am glad we have this!
Reposted from doreljuvenile-maxicosi
Maggie
Nov 4, 2025

Convertible Car Seat that Delivers on Every Level

[This review was collected as part of a promotion.] Thank you to the Stellar Product Testing Panel for providing me with this car seat. The Maxi-Cosi Kani 4-in-1 offers impressive quality at an amazing value. The car seat has a slim, space-saving design which a top priority as a small vehicle owner! It fits well in my back seat, even next to another car seat. In addition, the installation process was surprisingly simple; within minutes I was able to get everything level and tight. My favorite feature by far is the 4-in-1 mode. The car seat can transition into four stages: from rear-facing to forward-facing, then to high-back booster and a backless booster seat. This is highly convenient as it means we can avoid buying multiple car seats as our child grows. Overall, the Maxi-Cosi Kani 4-in-1 has been an excellent addition to our car. I recommend it to any parent looking for a long-term car seat!
Reposted from doreljuvenile-maxicosi
Becca
Nov 3, 2025

Convertible car seat

[This review was collected as part of a promotion.] I received this car seat as part of a stellar product testing panel. I Loved how comfortable this seat was for my 15 month old. My favorite part is the ease of buckling and tighten the straps once I put my baby in, that’s a huge plus for me! The installation was a little annoying but it’s not a seat I’ll be taking in and out so it won’t bother me really. Love that I can just buy one seat and keep it while my baby grows. Overall this is a great versatile seat that I’d recommend to a friend.
Reposted from doreljuvenile-maxicosi
4432
Nov 1, 2025

The new LUX style car seat

[This review was collected as part of a promotion.] I think of the overall value of this car seat is right on point for the luxury feel without feeling like something is overpriced. The fabric was very nice and the details from the actual car seat to the removable cup holders was a very nice neutral design. I really like the slim, 4-in-1 design because as I was installing it, I noticed that there was actually still space on the side of my captain chair as well as behind the seat. I compared it to another car seat that we have and it really does make for a big difference when space is limited. Something else I noticed was that as my baby grows, it has an easy hand grasp at the back to recline or incline the car seat depending on what you need. It was simple for figure out and I can foresee this being handy as we reach the next level in aging up with this carseat. The installation process was very easy. The built in latch mechanism is GOLD when trying to install and even uninstall. It makes it simplified all around especially when needing to move around car seats with multiple kids. My favorite feature of this car seat has to be that the chest clip buckle is a clip, but magnetic! I have not seen this yet on a car seat and I actually love it! Thank you to the Stellar Product Testing Panel for providing me with this car seat.
Reposted from doreljuvenile-maxicosi
Deskins14
Nov 1, 2025

Amazing and Easy to Adjust Features

[This review was collected as part of a promotion.] The Maxi-Cosi Kani 4 in 1 convertible car seat sets the bar high for car seats! As a mom of 4, it takes a lot to impress me with car seats, but this car seat is hands down the easiest to install and adjust as my child grows. What is amazing is that the adjustment for the headrest actually adjusts the shoulder straps simultaneously! There is no need to rethread the shoulder straps as your little one grows! This also makes it easier to fit the seat properly. My only issue is that the release for the harness is at a bit of an awkward angle when trying to loosen. The harness itself is held together by a magnetic release that my little one (18 months) has yet to figure out, which I am grateful for. I also appreciate how I only need to have one car seat. This will take my kiddo from infant to booster seat and it feels like quality that will last! I received this product as part of a Stellar Product Testing Panel. Thank you!
Reposted from doreljuvenile-maxicosi
Annie
Nov 1, 2025

Maxi Cosi Kani 4 in 1 Convertible Carseat

[This review was collected as part of a promotion.] I was given this car seat to try as part of the Stellar Product Testing Panel. The installation was easy and didn’t take much time. The carseat looks nice and my toddler was comfortable in it. I like that it will grow with her throughout childhood. She only has used it in the forward facing mode. I like that there are no added flame retardants, as this means a lot to me for my children to not sit in extra chemicals during car rides. I do not need to do three carseats across currently, but if I decide to have another baby, it is a nice option! I would recommend this carseat to anyone looking for an easy to install, nice looking, clean material carseat.
Reposted from doreljuvenile-maxicosi
Manders