Diono Radian 5 review£275.00
The Diono Radian 5 multi-group seat is approved for use with babies from birth up to 25kg, which is around seven years old. The regulation this seat is approved to does not include a side impact crash tests. All car seats we review include a side impact crash test. In our tests, a combination of poor frontal crash-test results and how difficult it is to install means the score is limited to 20% and it's a Don't Buy car seat. A good car seat should protect well in all the modes it's designed to be used in and be easy to install, to avoid error.
Further readingHow we test child car seats
Try Which? for £1 to reveal the products that perform
How the seat is secured to the car
The Which? difference
As well as thousands of impartial product reviews from our Test Labs, a Which? membership also gets you:
- Unlimited access across which.co.uk
- Advice on the move with our apps
- Which? magazine delivered to your door
- The inside scoop on important issues, from scams to savings accounts
Which? can help you make good decisions
Best baby car seats
Key safety differences between baby car seats and child car seats. Why babies need more protection in car crashes and how to keep them as safe as possible. Plus car seat carrycots vs baby car seats.
How to buy the right child car seat
Get our expert advice on which car seat you need for a newborn, baby or child. We explain car seat weight groups and i-Size, and give top tips on how to buy the best child car seat when you head to the shops.
Car seat weight groups
Which? guide to car seat weight groups. From group 0+ 0-13kg (birth to around 12-15 months to Group 1/2/3 9-36kg (around 9 months to 12 years), find out why it matters, weight groups vs I-size and when to go up a car seat group