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Maxi CosiAxissFix i-Size

i-Size toddler to child
Isofix installation only
Extended rear-facing seat

£149.99View retailers

Test score

Lowest available price

£149.99Amazon Marketplace UK

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The Maxi-Cosi AxissFix i-Size car seat can be used with babies from around four months to four years old (61cm to 105cm) and can be used rear-facing until your baby reaches two years of age. The handy swivelling seat should make getting your little one in and out of the car much easier. Find out how it performed in our specially designed crash tests.

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What's included?

What is it?
How safe is it?
Is the seat easy to fit?
Is the seat comfortable?
Is there anything else I should know?
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Where can I buy it?

Full Access first month £5, then £11.99 per month, cancel at any time.

KEY TEST RESULTS
Safety rating
Fitting in car
Comfort of your child

Aug 2023Last checked by Which?
Jun 2015First reviewed by Which?
Jan 2015Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test baby and child car seats

22 May 2025

Safety rating

Overall
Extended rear-facing i-Size (Isofix)
Forward-facing i-Size (Isofix)

How we test safety rating

The overall safety score is made up of the results of crash testing (front crash; side crash) seat design, stability in the car and belt routing. Our crash tests go beyond the legal minimum requirements for UK car seat regulations and are conducted at higher speeds and forces than the regulations require. We feel our tests more accurately reflect what could happen in a real life crash.

Fitting in car

Overall
Buckling up
Avoiding misuse and instructions
Cleaning
Space required in car

How we test fitting in car

Fitting and using includes: How easy it is to install the seat correctly in the car. How easy it is to strap a child securely into the seat. How well the seat is designed in order to prevent incorrect use. How easy the seat cover is to remove and wash. How little space the seat takes up in the car and how comfortable your child is in the seat.

Ergonomics

Overall
Comfort of your child

How we test ergonomics

Our experts conduct an ergonomic assessment of each seat to make sure your child will be in the best position when travelling, along with the level of padding and support. Our tests also reveal how much space this car seat takes up in the back seat of a car and how easy it is to get your child in and out of the seat. Plus, our eagle-eyed car seat experts will check whether this seat affects how much space any front passengers have. This assessment was introduced to our site in May 2015. If a seat does not have this score, it was tested before May 2015.

General
Height of child	61-105
Seat size	i-Size toddler to child
Age group	Toddler
Direction of travel	Rearward-facing/forward-facing
Extended rear-facing seat	Yes
Installation type	Isofix installation only
Harness or shield seat	Harness
How is the child held in the seat?	5 point harness
Manufacturer URL	www.maxi-cosi.com

Features
Adult seat belt	No
Isofix integrated into seat	Yes
Isofix base	No
Belted base	No
Type of Isofix	Isofix connectors
Swivel seat	Yes
Weight of seat (kg)	12kg
Weight of base (kg)	0kg
Part of a travel system?	No
Harness height adjustment	Moves with headrest
Recline	Yes
Adjustable headrest	Yes

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In Stock£149.99

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Maxi CosiAxissFix i-Size

Lowest available price