- GROUP 2/3 CAR SEAT: an i-Size certified, forward-facing toddler car seat that grows with your child and offers optimal stability – suitable from 3.5 – 12 years, 100 – 150 cm (approx. 15 – 36 kg)
- ISOFIX INSTALLATION: this ISOFIX car seat is designed and tested according to the highest EU safety standards (ECE R129). Using ISOFIX installation, this kids car seat promises your child safe travels
- ADJUSTABLE HEIGHT & WIDTH: the Kore i-Size is easily adjustable both in height and width by pulling the easy accessible handle in the headrest, providing optimal comfort to your little one
- QUICK & EASY BUCKLE UP: the open design of the car booster seat makes it easy for children to get in and out and to buckle up themselves as the belt guide ensures the correct position of the seat belt
- SIDE PROTECTION SYSTEM PLUS: Kore i-Size is equipped with Side Protection System Plus, which consists of glass fiber shock absorbers in the side wings combined with energy absorbing material
- MACHINE WASHABLE COVER: an accidental spill can always happen, but there is no need to worry – the car seat’s cover can be easily & quickly removed and is machine washable
- ACCESSORIES: you can purchase a summer cover designed to keep your child cool comfortable during warm weather, as well as a car seat protecter to prevent wear & tear of your vehicle
Maxi-Cosi Kore i-Size High Back Booster Seat, 3.5 – 12 years, 100 – 150 cm, ISOFIX Car Seat, Adjustable Height/Width, Side Protection System Plus, Quick & Easy Buckle Up,…
Sale! (13 customer reviews)

£179.99 Last updated on July 18, 2025 12:00 pm
Rated 4.38 out of 5 based on 13 customer ratings
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Maxi-Cosi Kore i-Size High Back Booster Seat, 3.5 - 12 years, 100 - 150 cm, ISOFIX Car Seat, Adjustable Height/Width, Side Protection System Plus, Quick &...
£171.99
in stock
Amazon.co.uk
Highest Price
£171.99
Amazon.co.uk
July 18, 2025
Lowest Price
£154.59
Onbuy.com
July 15, 2025
Since July 15, 2025
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Minimum Height Recommendation | 100 Centimetres |
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Additional product features | Maxi-Cosi Kore i-Size car seat grows with your child both in height and width |
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Batteries required | No |
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13 reviews for Maxi-Cosi Kore i-Size High Back Booster Seat, 3.5 – 12 years, 100 – 150 cm, ISOFIX Car Seat, Adjustable Height/Width, Side Protection System Plus, Quick & Easy Buckle Up,…
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Rosemarie –
Excellent car seat. Very easy to use and put in and out of the car. My daughter can also get herself in and out quite easily and she says it is really comfortable with the padding. Feels sturdy and secure but is still lightweight and easy to carry if changing between cars etc. Great value for money as it should last until she does not need a car seat any more.
Ale –
Compramos dos a la vez y nos han encantado desde el principio. Muy fácil de instalar con ISOFIX, el respaldo se ajusta en tiempo real para que el reposa cabeza quede centrado con la cabeza del niño. Lo que nos gusta mas es que al crecer el asiento se adapta a la altura del niño manteniendo continuidad (sin ver espacios raros entre asiento y respaldo) y ensanchándose para dar mas espacio a las espaldas.
Ademas cumple con la ultima y mas rigurosa normativa I-Size; de momento estamos mas que satisfechos!
Amzaky –
Au début j’etait totalement sceptique mais fille l’a totalement adopté ! elle attache sa ceinture toute seule maintenant
aaron fawcett –
Easy to install, looks good and isn’t to bulky in the back of the car
Fiona –
The is 2nd time to buy the car seat of maxi cosi, try another brand still think maxi cosi is the most safety and comfy car seat for my child. Valuable to purchase
sven weber –
Für uns der beste Kindersitz.
James –
Amazon suggested ordering the cover with the specific car seat model. Did t fit and now can’t return. Poor service.
Ballmysta –
So after my son grew out of his original maxi cosy isofix seat, we needed something a bit bigger that utilised the cars seat belts.
There are so many available, with and without isofix.
We wanted isofix, so the chair wouldn’t move about when not in use.
There are so many cheap chairs and really expensive chairs, we really didn’t know wether the money made any difference.
So after a visit to a shop to look at some properly, we came acros this one.
It’s really sturdy and comfortable.
It fits my son perfectly.
We ordered from Amazon as it was cheaper than the shop.
It arrived promptly and we put it in our Audi q2.
It fits perfectly, and my son loves it. He is able to do his own seat belt due to the design (which he can’t in our second seat) so that makes things much easier.
So I would say but this one, not a cheap one, it’s so worth it
KD –
I was a little confused upon opening the box in which this was shipped to find absolutely no sign of instructions whatsoever, which was doubly confusing as there is a convenient latchable cavity in the chair to store the instruction manual.
Lack of instructions aside, the seat is relatively easy to fit, though the ISOfix latches have a disengagment button that could be less fiddly to use – it’s easy enough to press, but latches frequently when attempting to extend the ISOfix bars, which is annoying but not a deal breaker.
The height adjustment is easy using buttons around the headrest, and my 5 1/2 year old daughter says it’s comfortable, though she’s not quite big enough to reach around and fasten her seat belt yet.
Beata –
Fotelik przyszedł zapakowany w folie, bez oryginalnego opakowania, instrukcji czy dokumentów, które dają możliwość zarejestrowania go na stronie producenta i gwarancji. Produkt powystawowy lub używany o czym nie było mowy w opisie wiec jest to mocno niepokojące. Oryginalny fotelik to gwarancja bezpieczeństwa tutaj mam wątpliwości co do jego pochodzenia i jakości w związku z tym jak to wyglada.
Nigel Mark Bailey –
looking for the right car seat is an absolute pain in the backside. To know what is right, safe and quality for your children is a huge worry and we ended up opting for the tried and tested Maxi-Cosi Kore i-Size.
The seat is brilliant, the Isofix has a tight ratchet which allows the car seat to hug the seat and not move. The seatbelt doesn’t catch and is easy for our 4-year-old’s to put on and take off. I highly recommend these seats as a dad of 5 (we bought 3). They are sturdy, well built and comfortable and most importantly safe. All though they do have a hefty price tag (when compared to the budget seats) they still represent excellent value as the children will probably use then for 3 – 5 years,
An absolute safe bet if you are unsure – you will be very happy with the seats for your precious children.
Liam A. –
Purchased this as my 3 year old had just about outgrown his previous car-seat. It’s difficult to know what to look for when picking a car seat. This one was decent value and easy to install with ISOfix. It required zero assembly – just lifting straight out of the box, putting in the car and sliding back the connectors until they click. It feels solid and my son says it’s comfortable. Would recommend.
JL –
Der Bezug passt gut auf den Sitz. Es ist – zugegeben – ein bisschen Fummelarbeit, aber es lohnt sich. Unsere Kinder schwitzen weniger. Wenn sich ein Kind übergibt, lässt sich der Bezug einfach abziehen. So kann man die Fahrt gut fortsetzen und kann den Bezug easy waschen.