Maxi-Cosi Tanza i-Size, High Back Booster Seat, 3.5–12 years, 100–150cm, Compact Foldable Car Seat, 10 Headrest Positions, G-
Reviewed 1 September 2026 · price checked live
Check price on Amazon →Overview
Maxi-Cosi Tanza i-Size, High Back Booster Seat, 3.5–12 is one of the 50 car seats & accessories products in our catalogue, tracked on rating, review volume and live price. The maker describes it as follows: 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). Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.3 out of 5 from 1,409 ratings. What that score is worth next to its rivals is set out below.
- Brand
- Maxi-Cosi
- Amazon rating
- 4.3 / 5 from 1,409 ratings
- vs Car Seats & Accessories
- 0.3 below the category median of 4.6
- Rank in category
- 44 of 50 rated car seats & accessories we track
- Price position
- Towards the top of the range (category spans £4.59 to £239)
- How proven
- Moderate review volume
How it compares in Car Seats & Accessories
Across the 50 rated car seats & accessories products we track, the typical score is 4.6 out of 5. This one sits at 4.3, which is in the bottom quarter of the category. That does not make it a bad buy, but there are better-rated alternatives on the same shelf, so it needs another reason to earn your money.
It carries 1,409 ratings against a category median of 1,409. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the upper third of a category running from £4.59 to £239, where the midpoint is about £14.00. Paying above the category norm needs a reason beyond the rating, because the score alone does not justify the gap here.
Worked out from the 50 car seats & accessories products in our catalogue, not from the brand's own claims. How we rank →
Key features
- 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
