Rank #9 in Best ISOFIX Car Seats 2026: 10 Ranked, and the Spec Fields That Fight the Copy
Kinderkraft Safety FIX 3 PRO i-Size, 76–150cm
Price and rating as shown on Amazon when we collected them. Both change.
The Kinderkraft Safety FIX 3 PRO sits at number 9 in this guide. It is listed at £68.23, with a 4.5 rating from 254 Amazon ratings, and it covers 76-150 cm — the booster stage, which the listing ties to 15 months to 12 years and calls Group 1-2-3. The bullets promise ISOFIX and Top Tether, with vehicle seat belt fitting as an option, a 5-point harness with soft pads, an Easy Grow system that moves headrest and harness together without rethreading, and H-Guard plus SPS side protection.
The problem is in the spec table, and it is not a small one. Orientation is listed as Rear Facing, and Rear Facing Maximum Weight as 18 kg, on a seat whose own name and bullets describe a 76-150 cm forward-facing booster for a child up to 12. Installation Type is listed as Latch, while the bullets promise ISOFIX and Top Tether. On a seat at this stage, which way it faces is the whole product, not a detail. Everything below comes from the Kinderkraft Safety FIX 3 PRO listing on Amazon, not from testing we carried out ourselves.
How those 254 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £68.23 |
|---|---|
| Rating | 4.5 out of 5 from 254 ratings |
| Stated height and age range | 76-150 cm, 15 months to 12 years |
| Orientation (as listed) | Rear Facing |
| Installation Type (as listed) | Latch |
| Harness Type (as listed) | 5-Point |
| Weight recommendations | 9 kg minimum, 36 kg maximum; 18 kg rear-facing maximum (as listed) |
| Item weight and dimensions | 7.31 kg; 38 x 45 x 57 cm (D x W x H) |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Bought for visiting family, and it was very easy to fit, clean and use. Exactly what we needed and seems very adjustable, which is great.”
Verified purchase“Works perfectly easy to remove while switching between cars my daughter loves it”
What it is up against
The rivals it was ranked against in Best ISOFIX Car Seats 2026: 10 Ranked, and the Spec Fields That Fight the Copy.
Questions people ask
Is the Kinderkraft Safety FIX 3 PRO rear facing?
The spec table says Orientation: Rear Facing, with a rear-facing maximum weight of 18 kg. The product name and bullets describe a 76-150 cm seat used from 15 months to 12 years, which is the forward-facing booster stage. The listing does not explain the two together.
How does the Kinderkraft Safety FIX 3 PRO install?
The bullets say ISOFIX and Top Tether, with optional vehicle seat belt installation depending on the child's height. The spec table lists Installation Type as Latch, which is a different fitting system.
What size of child does the Kinderkraft Safety FIX 3 PRO fit?
The listing gives 76-150 cm and 15 months to 12 years, described as Group 1-2-3, with a minimum weight recommendation of 9 kg and a maximum of 36 kg.
Does the Kinderkraft Safety FIX 3 PRO have a harness?
Yes. The bullets describe a 5-point harness with soft pads, and the spec table lists Harness Type as 5-Point. The Easy Grow system adjusts the headrest and harness in one movement without rethreading.
What is the rating breakdown?
The listing shows 4.5 out of 5 from 254 ratings. The breakdown it prints adds up to 100, not 254 — 78 five-star, 9 four-star, 7 three-star, 1 two-star and 5 one-star — so those figures read as percentages rather than counts.
How heavy is the Kinderkraft Safety FIX 3 PRO?
The listing gives an item weight of 7.31 kg and dimensions of 38 x 45 x 57 cm (depth x width x height), in black.
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