Parents may feel deflated when they discover that The Maxi Cosi Pria Max 3 in 1 or All-In-One Car Seat is not as successful as its predecessors. In this review, we will uncover the reasons behind this and explore the features of the Maxi Cosi Pria Max 3 in 1 car seat. Dive in to get all of the details!

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ideal use

Rear-Facing Weight:

4 to 40 pounds

Rear-Facing Height Limit:

19 to 40 inches

Forward-Facing Weight:

22 to 65 pounds

Forward-Facing Height Limit:

29 to 49 inches

High Back Booster Weight Limit:

40 to 100 pounds

High Back Booster Height Limit:

43 to 52 inches

The Maxi Cosi Pria Max 3 in 1 car seat features three different modes to accommodate children from 4 to 100 pounds and 19 to 52 inches in height. 

The rear-facing mode is designed for infants up to 40 pounds and 19 to 40 inches tall, while the forward-facing option is suitable for children between 22 and 65 pounds and 29 to 49 inches high. 

Finally, the high back booster mode allows older kids from 40 to 100 pounds and 43 to 52 inches tall to travel safely. 

The Maxi Cosi Pria Max 3 in 1 features the "Pure Cosi" infant positioning pillow, designed to provide back and head support for smaller infants. Installing this feature is highly recommended as it helps cradle your newborn’s head during turns in the car. There is no specified weight limit for the insert, so you can remove it at any time.

will it fit in my car?


21.5 inches


24.75 inches


27 inches

The Maxi Cosi Pria Max 3 in 1 car seat measures 21.5 inches wide, 24.75 inches high, and 27 inches deep when it first comes out of the box. But when you adjust the headrest up, the overall height increases to 29.75 inches. 

When the seat is in position 2 and reclined, it measures 22.5 inches high and 31 inches long.

When in position 3 and in a rear-facing configuration, the Maxi Cosi Pria 3 in 1 car seat is 21 inches high and 33.5 inches long.

Maxi-Cosi Pria Max All-in-One Convertible Car Seat, Essential Black - Pure COSI
Price: $319.99
(As of: 2024/06/12 6:27 am - Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on at the time of purchase will apply to the purchase of this product.
6 new from $319.990 used
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Do I need to use a pool noodle/rolled towel?


Easy To Install Rear-Facing?


Easy To Install Forward-Facing?


Easy To Uninstall?


Opting for the the Maxi Cosi Pria Max 3 in 1 can be tricky. When installing the seat using the LATCH, it is important to take the very end of the lower latch belt (the one you are pulling to tighten it) and route it through the same path back from right to left, then pull it through the opening below the lower cushion. 

Unfortunately, this step is not always explained in detail in videos, so many parents find themselves struggling with installation until they read plenty of reviews and comments on video installations.

Some find it easy to install when you have it set to recline “1” for rear facing, or “3” for forward facing.

Ensuring the Maxi Cosi Pria Max 3 in 1 is level parallel to the ground using a “line indicator” (not a bubble level) can be difficult. It may help to place a rolled towel under one end of the base as suggested in the manual as this could make installation easier and smoother.

How To Install The Maxi Cosi Pria Max 3 in 1 Rear-Facing With LATCH

How To Install The Maxi Cosi Pria Max 3 in 1 Forward-Facing With Seat Belt and Tether


Country Of Origin:


Steel-Reinforced Frame:


Five-Point Harness?


Side Impact Tested:


Approved For Airplane Use:


Easy To Buckle And Unbuckle?


Easiest Convertible Car Seats To Install (2024)

the seat

Is The Material Breathable?


Seat Weight:

22 pounds

Machine Washable Cover?




No-Rethread Harness?


Comes With An Infant Body Support?

Yes (Pure Cosi)

Easy To Remove Cover?



10 Years

Comes With A Cup Holder?

Yes, 2

Shoulder Harness Has Pads?


The Pria 3 in 1 Max car seat is padded for comfort and looks great. Unfortunately, the head support pillow can easily slip out of position. 

If you find that your cover has been damaged, Maxi Cosi can send you a replacement cover. 

The Maxi Cosi Pria Max 3 in 1 all in one car seat is not meant to be reclined when forward facing, something that some parents wish can be improved.

My Final Verdict

Attempting to install the Maxi Cosi Pria 3 in 1 Max car seat can be challenging and, for some parents, many failed installation attempts lead to a feeling of giving up.

Additionally, adjusting the recline settings once installed may be difficult and the seat may not lay back as expected in rear-facing mode.

The back of the Maxi Cosi Pria Max 3 in 1 car seat, just like its predecessors, is entirely open exposing all the belts and mechanisms. Though this may be a useful feature for those needing to access the internal components, it does give off an inexpensive aesthetic.

Ultimately, the new Maxi Cosi Pria 3 in 1 Max does not seem to match up to the performance of the older models.

What do you think?

I’d love to know your thoughts in the comments section below!



the Maxi Cosi Pria Max 3 in 1

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