Chicco KeyFit 35 Review (2023)

A really nice seat with better crash tests analysis and a reasonable price tag, but it could be too heavy for some users

Chicco KeyFit 35 Review (1)

This Product
Chicco KeyFit 35

Chicco KeyFit 35 Review (2)

Peg Perego Primo Viaggio 4-35

Chicco KeyFit 35 Review (3)

Cybex Aton 2

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Chicco KeyFit 30

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Baby Trend EZ Flex-Loc

AwardsChicco KeyFit 35 Review (6)Chicco KeyFit 35 Review (7)Chicco KeyFit 35 Review (8)Chicco KeyFit 35 Review (9)Chicco KeyFit 35 Review (10)
Price$270 List
$236.51 at Amazon
$300 List
$299.23 at Amazon
$320 List$230 List
$211.20 at Amazon
$120 List
$109.99 at Amazon
Overall Score






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Bottom LineA reasonably priced seat with better crash-test analysis results that is super easy to install but on the heavy side for regular carryingAn excellent quality seat with impressive crash tests, but poor stroller compatibilityBest crash score with additional safety features, but it is more expensive and harder to useGood crash test results and a lower price make it a nice option for most familiesWallet-friendly car seat that is easy to install that would make a good second seat
Rating CategoriesChicco KeyFit 35Peg Perego Primo Vi...Cybex Aton 2Chicco KeyFit 30Baby Trend EZ Flex-Loc
Crash Test (20%)






Ease of Install - LATCH (20%)






Ease of Install - Belt (10%)






Ease of Install -w/o Base (5%)






Ease of Use (15%)






Comfort/Quality (15%)






Weight/Size (15%)






SpecsChicco KeyFit 35Peg Perego Primo Vi...Cybex Aton 2Chicco KeyFit 30Baby Trend EZ Flex-Loc
Crash Test HIC Score342491340330617
Crash Test Chest G Clip51464450.551
Minimum Passenger Weight4 lbs4 lbs4 lbs4 lbs4 lbs
Max Passenger Weight35 lbs35 lbs35 lbs30 lbs30 lbs
Max Passenger Height32"32"30"30"30"
Belt Routing StyleEuropeanEuropeanEuropeanAmericanEuropean
Seat Weight10.9 lbs9.6 lbs9.3 lbs10.1 lbs8.6 lbs
Recline Positions5Infinite454
Shoulder Harness Positions56333
Crotch Strap Positions11111
Built in Lock OffYesYesYesYesNo
Anti-rebound DeviceYes Built inYesHigh Back BaseHigh Back BaseNo
Load LegNoNoYesNoNo
Locking Handle Positions45333
Allowed Handle Positions For Auto TravelCarry Position
Stationary Position
Rocking Position
1 for Base Install (even with the top of the seat),
1 for Seat Only Install (all the way forward)
Carry PositionAnyNot Listed
Head SupportYesYesYesYesYes
Newborn InsertYesYesYesYesYes
No Rethread HarnessYesYesNoNoNo
Onboard Manual StorageStorage Compartment on front of the base.Stores in a hard flip down pocket on the back of the seat.Stashes in a pocket under the bottom of the seat.Storage Compartment on the front of the base.On the back of the seat towards the bottom.
Level Indicator On BaseBubble IndicatorBubble VialBall In TubeBubble VialNone
Level Indicator On SeatLine on DecalLine On DecalLine On DecalLine On DecalHanging Indicator

As one of the biggest baby brands in Europe, Chicco (kee-ko) is a company that provides various types of gear. They make gear that includes items for feeding, traveling, some parents' favorite strollers, and more. Founded by Pietro Catelli, Chicco offers products for children ages pre-birth to preschool. You can find their products in over 120 countries across the globe.

Performance Comparison

Chicco KeyFit 35 Review (12)

Crash Test

In our analysis of the crash test sensor data, the Keyfit 35 demonstrated an additional margin of protection over the average for the group with G-force results lower than most.

For the head sensor (HIC score), the Keyfit 35 had a result of 342, where the maximum allowed is 1000, and a lower number is better.

Only a handful of infant seats earned results lower for the HIC sensor. The lowest result and best performer is the Chicco Keyfit 30 with a reading of 330.

Chicco KeyFit 35 Review (13)

Chicco KeyFit 35 Review (14)

For the chest clip sensor, the Keyfit 35 result was 51, where the maximum allowed is 60 and a lower number is better. This result is within the guidelines set by the Federal government for safety seats. The best result in the group is a 44 earned by the Cybex Aton 2.

The Keyfit 35 manufacturer claims include energy-absorbing foam for side impact protection (SIP). SIP is not a defined term universally agreed upon in the industry. So, it might mean different things depending on the manufacturer. For this reason and others, it is difficult to tell what this claim means and how it was tested or whether or not it contributes to the performance of the seat during crash testing. It also sports an anti-rebound bar, and while science supports this addition as increasing safety, it is hard to tell if it does in the real world. While we love safety features, we believe the crash test results should hold more sway in your decision-making than claims offered by the manufacturer on additional safety features.

Chicco KeyFit 35 Review (15)

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Ease of Install - LATCH

The Keyfit 35 is so easy to install using LATCH it earned top honors in our tests.

The LATCH connectors are push style and work well (above left). They push on easily with a center strap pull to tighten (above right). The strap is easy to pull, and the base tightens without a problem. The red release button is easy to depress, and the connector pops loose on its own.

Chicco KeyFit 35 Review (18)
Chicco KeyFit 35 Review (19)
(Video) New Parents SHOCKED by Incredible Chicco KeyFit 35 Features

The Keyfit 35 has a bubble level indicator on the base (above left), helping parents achieve the right installation angle. A level on both sides allows parents to see what is happening no matter where they install the seat. We didn't need towels or pool noodles during installation for a proper fit.

Chicco KeyFit 35 Review (20)

Ease of Install - Belt

The Keyfit 35 is less straightforward to install using the vehicle belt, but it is still better than some of the competition and not convoluted.

The Keyfit 35 has a belt lock-off, which is good, but this version is harder to use than much of the competition. When using the shoulder belt in the vehicle, it can be difficult for the lock-off to get the belt tight enough to avoid travel along the belt. The belt pathway is not color-coded, which, while not necessary, is an excellent visual cue that you are doing it right. Overall, the 35 feels more stable and secure once installed than the 30.

Chicco KeyFit 35 Review (21)

Ease of Install - Without the Base

The Chicco 35 is also harder to install without the base than the LATCH method. This method is popular with travelers or city dwellers who rely on public transportation.

This car seat utilizes the American belt path, and the pathway is not color-coded. The beltway crosses the carrier's foot and isn't hard to see, but it is harder to thread than much of the competition. And despite our efforts at tightening the belt, the seat still felt pretty unstable compared to the competition. It is probably best to install this seat using the base unless you absolutely can't.

Chicco KeyFit 35 Review (22)

Using towels could be the solution to getting a tighter, more stable fit depending on your car, but then you need to carry towels with you in addition to the carrier. We believe that the Keyfit 35 would benefit from the European belt path that utilizes the shoulder strap around the carrier's back for more stability.

Chicco KeyFit 35 Review (23)

Ease of Use

The Keyfit 35 is easier to use than much of the competition.

(Video) Chicco KeyFit 35 Infant Car Seat - Demo


The buckle on the Keyfit 35 is stiffer than that on the 30. However, it is clear of padding and is easy to operate with both hands. The chest clip is average and has a center button to release. It will require two hands for most parents.

The chest clip isn't the most rigid but is not as easy to depress and slide apart as it could be. Some testers had difficulty getting thumbs caught in the ring that surrounds the button, but overall it is easy to connect and mate-up the two sides.

Chicco KeyFit 35 Review (24)

Tightening the Keyfit 35 harness is easy with a smooth working strap, and the release button is bright orange and depresses with little effort. The button is not under the padding, making it super easy to access.

Shoulder strap height adjustment is a non-rethread operation, which is better than rethread style harnesses. There are dual pinch tabs on the rear of the carrier. They are positioned further back and in an alcove, making them harder to reach, which seems unnecessary. However, it is still easier than rethreading. It has five shoulder height positions and one crotch strap position.

Chicco KeyFit 35 Review (25)


The Keyfit 35 handle operates by squeezing dual levers on both sides to rotate it to the desired position. It has four positions, and two of them are allowable while driving. Unfortunately, the handle and copy have some collision and rubbing, which isn't ideal. It isn't a deal-breaker, but it feels like an oversight. We like the rubbery grip on the center, which makes it both more comfortable to hold and easier to hang onto.

Chicco KeyFit 35 Review (26)

Carrier and Base Connection

Carrier to base attachment is straightforward and works well. We had no difficulties making the attachment and never got it wrong. There was very little readjustment required. The release handle is in a good spot on the carrier and squeezes easily to detach the seat. We prefer this release location so you can release and lift in one motion.

Chicco KeyFit 35 Review (27)
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Chicco KeyFit 35 Review (28)

LATCH Anchor and Manual Storage

The Keyfit 35 LATCH anchors are stowed near the front of the base. It is easy to insert the LATCH connectors, and they do not fall out. They keep the straps and connectors out of the way (mostly) but aren't anything special. Taking a few extra moments to tuck the straps inside will help keep everything contained. The manual storage is a compartment on the front of the base. In our opinion, this location is not the best, as you will not have it if you need to install the seat without the base.

Chicco KeyFit 35 Review (29)


The Keyfit 35 performed well for comfort and quality compared to the competition. Its score is better than average and better than the Keyfit 30.

The comfort padding is relatively thick and cushy but not very dense. This feels comfortable but could condense over time and become less so. The fabric is an upgrade from less expensive Chicco seats, and it is something they call ClearTex. It has a somewhat rougher feel, but it also feels more durable and of higher quality. The shell isn't the best or worst; while not smooth all around for easy cleaning, it also doesn't have a grid pattern or small spaces for gunk to collect.

Chicco KeyFit 35 Review (30)

The fit and finish are also better than average. The seat fabric fits the shell perfectly and has a clean and sleek finish. Even the infant insert fits in place without looking messy or like an afterthought, as much of the competition does. The handle is sturdy and has a grippy center portion that makes it more comfortable to hold. The canopy fabric looks good, but the canopy collides with the handle, and this is a disappointment and a flaw in an otherwise nice car seat.

Chicco KeyFit 35 Review (31)


The Keyfit 35 weighs 10.87 lbs, making it somewhat heavier than its little brother and sort of large for the group. It manages to stay below the heaviest options, but we aren't sure it is a weight most parents will want to carry with a baby on board.

Selecting your car seat based on the carrier weight is not ideal. Other concerns such as ease of installation and crash test scores should be more important. However, city dwellers might use this metric as a tie-breaker if they will be carrying their little one in a car seat carrier regularly.

Stroller Compatibility

The Keyfit 35 is compatible with most Chicco strollers. The Chicco Keyfit Caddy is a lightweight frame stroller that can buy you time before deciding what kind of stroller will best suit your long-term needs. As long as your little one is still safely in their infant car seat, you can use the Caddy.

(Video) Chicco KeyFit 35 Base Product Demonstration

Should You Buy the Keyfit 35?

Once upon a time, we thought we loved the Chicco Keyfit 30, but then along came the Keyfit 35. Fickle friends? We might be, but you'll forgive us, given all the Keyfit 35 brings to the table. The Keyfit 35 is definitely a seat we would recommend to a friend. We think there is much to love about this seat, with better crash test results and the easiest installation for LATCH in the group. It is also reasonably priced and compatible with a variety of different strollers (assuming they accept infant car seats with adapters).

What Other Infant Car Seat Should You Consider?

If your budget won't stretch to the Keyfit 35, the Keyfit 30 is still a great seat with one of the best HIC crash test results. It is also compatible with most strollers, has the same crash test analysis score, and is easy to use. We love this simple seat and think most parents will too. Alternatively, if your budget is bigger and you want the absolute best for crash test analysis, the Cybex Aton 2 is the one for you. However, if you go this route, you'll likely need a top-ranked baby carrier] as it isn't compatible with many strollers.

Manufacturer Video


Chicco KeyFit 35 Review? ›

The rear-facing KeyFit® 35 clicks in and out of stay-in-car base and compatible strollers to carry infants from 4 to 35 lbs and up to 32" tall.

How long can baby use Chicco KeyFit 35? ›

The rear-facing KeyFit® 35 clicks in and out of stay-in-car base and compatible strollers to carry infants from 4 to 35 lbs and up to 32" tall.

Is the Chicco KeyFit 35 Zip worth it? ›

The chicco definitely feels comfy to touch in all areas and much easier to position baby to buckle. Ultimately if I had to go back and select only 1 stroller and 1'd be the chicco keyfit 35 cleartex paired with the mini bravo. For the amount I spent altogether.. trying to love the uppababy though.

Is the KeyFit 30 or 35 better? ›

The Chicco KeyFit 35 has the no-rethread harness that the 30 does not, a key differentiator. The Chicco KeyFit 35 also has some improved features, including the added security of an anti-rebound bar and higher-end UPF 50+ fabric on the canopy. It also has more recline and headrest positions.

Is the Chicco KeyFit 35 airline approved? ›


The KeyFit 35 is FAA-approved without the base. Rear-facing only carriers are very easy to install on an airplane with just a bit of practice.

How old is a 35 lb baby? ›

Once the child passes 35 lbs, which is usually around two years of age, you should start thinking about a front-facing safety seat, or a harness, that will keep your child safe and comfortable.

What is the weight limit for KeyFit 35 infant insert? ›

A: The newborn body insert must be removed once the child reaches 11 lbs. for the KeyFit 35 car seat.

Does Chicco KeyFit 35 have side impact protection? ›

The Keyfit 35 manufacturer claims include energy-absorbing foam for side impact protection (SIP).

How long do babies stay in Chicco KeyFit 30? ›

The Top-Rated Infant Car Seat

The rear-facing KeyFit® 30 clicks in and out of a stay-in-car base and compatible strollers to carry infants from 4 to 30 lbs and up to 30".

How long can you use a Chicco car seat? ›

For Chicco car seats, refer to this guide: Infant car seats: 6 years from DOM. Convertible car seats: 8 years from DOM. All-in-one car seats: 10 years from DOM.

What age can you use Chicco baby carrier until? ›

It is suitable from birth to a maximum weight of 9kg, easy to wear, adjusts easily as your baby grows and provides extra support for baby's head and neck for the first few months.

How long can you use the Chicco KeyFit 30 infant insert? ›

Infant Inserts

The newborn positioner – the part the child sits on – is optional for 4-11 pounds but must be removed no later than when the child weighs 11 pounds. The head insert is optional at any weight as long as the harness is in one of the lower two sets of harness slots.


1. Chicco KeyFit 35 Infant Car Seat - Installing KeyFit 35 Base with LATCH
2. Chicco Bravo Primo Travel System Product Demonstration
3. Chicco KeyFit 30 - Frontal Impact Test
(NYT Wirecutter)
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