10 Best Child Car Seats 4 Years To 12 Years in The UK

Last updated on 27/06/2025

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Maxi-Cosi RodiFix AirProtect High Back Booster Seat, 15 - 36 kg, 3.5 - 12 Years, Reclining ISOFIX Car Seat, Adjustable Headrest/Backrest, Extra Side Protection, Quick & Easy Buckle-up, Authentic Black

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Why We Love It

Easy ISOFIX installation system.
Adaptable, comfortable design.
Washable, interchangeable covers.

Main Highlights

GROUP 2/3 CAR SEAT: an ECE R44/04 certified car seat that can be used for children from approx. 3.5 to 12 years (15 to 36 kg)
ISOFIX INSTALLATION: the one-click ISOFIX installation system ensures a stable and solid position of the car booster seat allowing safe travels with your child in a forward-facing position
AIRPROTECT TECHNOLOGY: the AirProtect technology in the headrest is designed to absorb the force of impact, providing the best side protection possible and reducing risk of head injury with 20%
SIDE PROTECTION SYSTEM: the side impact protection along the height of the car seat offers additional protection for your child’s lower back and hips in case of a side collision
QUICK & EASY BUCKLE-UP: with its unique belt-guide system your life is made easier as children can easily buckle up themselves by following the indicators integrated in the headrest
GROWS WITH YOUR CHILD: this multi-functional child seat grows along with your little one thanks to the headrest that is adjustable in height and the backrest that is adjustable in width
EXTRA COMFORT: when it is time for your child to take a quick nap you can quickly tilt the booster seat into 2 recline positions as needed, keeping your child comfortable at all times
MACHINE WASHABLE COVER: the car seat's cover can be easily removed and is machine washable. In addition you can purchase a machine washable summer cover to be used during warmer days
ACCESSORIES: alongside this car seat 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

Maxi-Cosi Tanza i-Size, High Back Booster Seat, 3.5–12 years, 100–150cm, Compact Foldable Car Seat, 10 Headrest Positions, G-CELL Side Impact Protection, Padded & Elevated Kids Car Seat, Full Black

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Why We Love It

Folds for easy storage.
Excellent side impact protection.
Eco-friendly recycled materials.

Main Highlights

GROUP 2/3 CAR SEAT: the multi-age forward-facing car seat effortlessly combines comfort, safety, and convenience on the go and throughout childhood from 100–150cm (approx. 15–36kg)
I-SIZE SAFETY: the ISOFIX car seat is designed according to the highest EU safety standards (i-size ECE R129), while the secure ISOFIX attachments mean you can have confidence through years of use
FOLDABLE CAR SEAT: the portable travel car seat (5.32kg) offers an easy, compact folding design (59.5cm x 28cm x 45cm) that allows you to take it with you, move it from car to car or store it away
G-CELL SIDE IMPACT PROTECTION: this integrated safety system provides expert protection from side impact as it spreads the forces away from your child reducing injury to the head, neck and shoulders
10 HEADREST POSITIONS: the Tanza i-Size car seat offers 10 headrest positions, providing your toddler with extra comfort as it can be adjusted in height as your child grows
TRAVEL IN COMFORT: your child can enjoy a comfortable and secure ride throughout their formative years thanks to the padded seat and an elevated seating position for better views
ECO-FRIENDLY PRODUCTION: Eco Care fabrics are made of 20 recycled plastic bottles and without the use of hazardous chemicals, meaning that your child’s skin is not exposed to any potential risks
100% RECYCLED FABRICS: the sustainable car seat cover is designed with Eco Care, which means the cover consists of 100% recycled fabrics - it can easily be removed and is machine washable

Graco Eldura R129 Harness Booster (76-145cm - 15 Months to Approx. 12 Years). Harness mode from 15 months to approx. 4 Yrs (76-105cm), Highback mode from approx. 3.5 to 12 yrs (105-145cm), Midnight

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Why We Love It

Transitions for extended use.
Enhanced side impact protection.
Easily adjustable harness system.

Main Highlights

2-in-1 car seat - get more longevity out of this car seat thanks to the 2 forward-facing modes. From 76 to 105cm (15 months to approx. 4 years), use Eldura R129 as a harness booster. When your child reaches 100cm (approx. 3.5 years), you can transition to highback booster mode until your big kid reaches 150cm (approx. 12 years).
R129 safety - this harness booster meets the EU’s latest and greatest R129 standards. This means Eldura R129 has undergone more side impact testing to ensure your child is safe on every adventure.
Safety Surround Side Impact Protection - wraps around your child and provides enhanced head and body protection
No-rethread harness - as your child grows, easily adjust the harness and headrest together with just one hand and in one smooth motion.

Graco Affix R44 Highback Booster car seat with isoCatch connectors, Suitable from approx. 4 to 12 years (15-36kg), Stargazer fashion

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Why We Love It

Safety features ensure child's protection.
IsoCatch connectors enhance seat security.
Covers are machine-washable.

Main Highlights

Group 2/3 car seat - suitable from 4 to approx. 12 years (15-36 kg )
Safety surround side impact protection, which gives your child the ideal head and body protection
Convenient isoCatch connectors keeps the seat secure to the vehicle seat
EPS, energy-absorbing foam for effective impact, energy management
Five position height-adjustable head support
Open-loop belt guides to help ensure proper seat belt positioning
Retractable cup holder and handy hideaway storage unit
Machine-washable covers

Kidoola Adjustable Car Seat for Toddlers & Children - Safety Certified Booster Seat, Padded & Comfortable with 3 Adjustable Age Functions & Straps, Up to 12 Years - ECE R44/04 (Grey & Black)

Why We Love It

Adapts to child's growth stages.
Offers customizable, secure fit.
Certified safety standard approved.

Main Highlights

👶 Adjustable with Age: The Kidoola car seat features three age functions, ensuring a secure and snug fit for toddlers and children up to 12 years old. This adaptability makes it a long-lasting investment for your family's safety.
👶 Adjustable Straps: Equipped with adjustable straps, this car seat provides a customised and secure fit for children of different sizes. The straps can be easily adapted to ensure a comfortable and safe journey every time.
👶 Padded and Comfortable: Your child's comfort is a top priority. The Kidoola car seat is generously padded to provide a cosy and enjoyable experience during travel. Whether it's a short trip to the grocery store or a longer road adventure, your little one will be comfortably seated.
👶 Safety Certified (ECE R44/04): Rest easy knowing that the Kidoola Adjustable Car Seat meets the stringent safety standards of ECE R44/04. This safety certification ensures optimal protection for your child during car journeys.
👶 Durable Construction: Crafted from high-quality HDPE, Polyester, and Polyurethane materials, this car seat is not only comfortable but also durable. The sturdy construction ensures longevity and reliability, making it an excellent choice for busy families on the go.

My Babiie Highback Booster Car Seat - ISOFIX, 100-150cm (Approx. 4-12 Years, Group 2/3), i-Size R129, Adjustable Child High Back Seat, Padded, 10 Position Headrest - Blush Leopard

17% Off

Why We Love It

Safe and secure features.
Customisable comfort for kids.
Stylish and unique designs.

Main Highlights

Safe and Secure – iSize, Isofix connectors, 3-point seat belt with or without Isofix, Lightweight and easily transferrable from vehicle to vehicle
Customisable Comfort - Well padded seat, Memory foam headrest, 10 position adjustable headrest, Padded armrests, Air ventilation system, Hand washable cover
Bold and brilliantly unique design - Comes in stylish Billie Faiers Black Quilted, Samantha Faiers Safari, and Katie Piper Blush Leopard designs
Wide seat for ultimate comfort and well-marked belt guides clear the path for simple and intuitive installation, Car seat grows with your child
Usage - Suitable from 100cm to 150cm (4 to 12 years), ECE R129 iSize standard extensive crash and safety testing

Cozy N Safe Logan Group 1/2/3 Car Seat 9-36kg, 9 Months to 12 Years, 5 Point Harness, Forward Facing, Side Impact Protection, Adjustable Headrest, Lightweight, Child, Toddler Car Seat - Black/Grey

Why We Love It

Adjusts with your child's growth.
Promises safety with 5-point harness.
Easy installation and lightweight design.

Main Highlights

GROWS WITH YOUR CHILD: The Logan car seat features an adjustable headrest and toddler insert cushions keeping all children no matter their size protected and comfortable.
5 POINT HARNESS: The child seat comes complete with a 5 point harness suitable for toddlers up to 18kg. This can then be hidden transforming the seat into a high backed booster.
FITTED IN MINUTES: The Logan can be fitted into most makes and models of car using the vehicle's seat belt.
REMOVABLE & WASHABLE COVERS: Accidents will happen that's why the Logan's covers can be easily removed and washed at 30°C.
ADDED COMFORT: Armrest, a large seating area and extra deep padding as well as insert cushions means the Logan is super comfortable for children no matter their size.
LIGHWEIGHT DESIGN: The Cozy N Safe Logan child car seat is a perfect addition for families who are always on the go. The lightweight design and easy fitting method allows you to swap the child seat between cars easily.

Cozy N Safe Everest Group 1-2-3, Convertible Multi Stage Child Car Seat (9 Months -12 Years) Black/Grey

Why We Love It

Grows with your child.
Supports with convenient cupholders.
Ensures superior comfort, safety.

Main Highlights

GROWS WITH YOUR CHILD - The adjustable headrest and toddler insert ensures your child is always safe and secure from 9 months all the way to 12 years old.
CUPHOLDERS - Pop out cupholders are perfect for drinks or snacks on those longer journeys.
INSERT CUSHIONS - The reversible toddler insert cushion gives the option for a grey or black look. All while supporting those smaller children.
5 POINT HARNESS - The harness can be used all the way up to 18kg (4 years old). Then can be hidden turning the car seat into a high backed booster seat.
DEEP PADDING - The extra deep padding offers additional side impact protection as well as being comfy for your child.

globalkids i-Size High Back Booster Car Seat, Group 2/3 ISOFIX Toddler Car Seat, with Cup Holder, Adjustable Headrest/Backrest/Width, 3–12 Years, 15-36 kg, 100cm-150cm, Black

15% OffFree Shipping

Why We Love It

Ultimate safety standards reassurance.
Grows with the child.
Convenience in easy installation.

Main Highlights

i-Size Car Seat - Complies with the highest safety standards ECE R129 i-Size regulation, which adding side crash testing compared to ECE R44. Additionally, it adds the protection of force-absorbing material in the seat head.
GROUP 2/3 Booster Seat - Child car seat offering long-term use - for children age from approximately 3 years to approximately 12 years(100-150cm, 15-36 kg).
Easy Installation - You could use in cars with or without Isofix, suitable for all cars. Isofix installing and uninstalling can be easily done. Isofix locks with red and green markings against misuse(more security).
Growing with your child - That is a multi-functional child seat. With growing of your child, you could adjust the headrest in height and the backrest in width.
Design for family- The cup holder is removable, you can assemble on both sides of booster seat according to your car. It also adds memory foam on the base for a comfortable long journey. Since comsidering the design of easy to be carried and stored, it's a lightweight and detachable.

Cozy N Safe Augusta EZFix 4-12 Years Old (15-36kg, Group 2-3,) Multistage, Adjustable Headrest, Isofix High Back Booster, Adjustable Car Seat

9% Off

Why We Love It

Secure fit with ISOFIX connectors.
Adaptable head rest, removable cushions.
Maintains comfort with deep padding.

Main Highlights

ISOFIX: The Augusta EZFix High backed booster seat is fitted securely in any type of car in seconds using the ISOFix connectors.
GROWS WITH YOUR CHILD: The Augusta EZFix has a fully adjustable head rest and removable cushions so your child is always secure and supported.
KIDS WILL LOVE THEIR BIG SEAT: The forward facing high backed booster seat is suitable for children from 4 to 12 years old.
DEEP PADDING: Our extra deep padding helps to protect and support your child while keeping them as comfortable as possible.
WASHABLE COVERS: All covers are easily removable and can be washed at 30°C keeping the seat Fresh and clean for years

8.7

Excellent

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We scanned 1483 products

We reviewed these offers relevant to the Child Car Seats 4 Years To 12 Years within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Maxi-Cosi, Graco, kidoola, My Babiie, COZY N SAFE, globalkids, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Child Car Seats 4 Years To 12 Years in the market, we considered we took a deep dive into 7416 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Maxi-Cosi RodiFix AirProtect High Back Booster Seat, 15 - 36 kg, 3.5 - 12 Years, Reclining ISOFIX Car Seat, Adjustable Headrest/Backrest, Extra Side Protection, Quick & Easy Buckle-up, Authentic Black. We love many things about this product by Maxi-Cosi. What sets it apart from the competition is Easy ISOFIX installation system, Adaptable, comfortable design, Washable, interchangeable covers.
The best value product for most shoppers and where user satisfaction is continuously the highest is Maxi-Cosi Tanza i-Size, High Back Booster Seat, 3.5–12 years, 100–150cm, Compact Foldable Car Seat, 10 Headrest Positions, G-CELL Side Impact Protection, Padded & Elevated Kids Car Seat, Full Black by Maxi-Cosi based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Child Car Seats 4 Years To 12 Years and the best cost-to-value ratio is My Babiie Highback Booster Car Seat - ISOFIX, 100-150cm (Approx. 4-12 Years, Group 2/3), i-Size R129, Adjustable Child High Back Seat, Padded, 10 Position Headrest - Blush Leopardat My Babiie with a 17% discount.
Our list of the best Child Car Seats 4 Years To 12 Years is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Child Car Seats 4 Years To 12 Years in The UK

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Graco Junior Maxi i-Size R129 Highback Booster car seat with cupholders, Suitable from 100-150cm (approx. 3.5 to 12 years), Midnight fashion

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Jovikids I-Size Booster Seat with ISOFIX, Suitable for Child Height 125-150cm, Portable Car Seats with Cup Holder for Kids, Comfortable & Compact for Everyday Use, Great for Travel, ECE R129 (Grey)

Jovikids I-Size Booster Seat for Car with ISOFIX, 125-150cm (Group 2/3, 6-12 Years), Portable Car Seats for Kids, Comfortable, Compact, Convenient for Everyday Use, Great for Travel, ECE R129, Black

Motacare Child Booster Seat 3-12yrs (15-36KG) - Group II & III (Black, Techno)

We scanned 1483 products

We concluded that: