KIDFIX III M, safety and maximum comfort

R44/04 - Group 2/3 (15-36 kg)

Premium Line

Based on Britax Römer's popular and successful KIDFIX range, KIDFIX III M has been designed to become the brand's most comfortable highback booster. Thanks to its new design and larger seating area, it provides greater comfort for both small and tall children, even during longer journeys. It also includes the acknowledged SICT and SecureGuard safety systems, offering excellent protection for children between 15 and 36 kg.



The SecureGuard helps to protect your child’s delicate abdominal area by adding an extra – a 4th – contact point to the 3-point seat belt. By keeping the lap belt in an optimal position over your child’s pelvic bones SecureGuard helps reduce abdominal forces in the event of a frontal collision by up to 35 %*, and at the same time allows your child freedom of movement during the journey.

KIDFIX III M - SecureGuard

Advanced side impact protection

Britax Römer´s high-back boosters protect your child in three ways: the device's shell provides protection from head to hip, especially in the event of a side collision; the upper and lower guides ensure that the 3-point seat belt is correctly positioned over the shoulders and hips; and the padded headrest provides safety and comfort for the child's head and neck.

In addition, the SICT system offers superior child protection in the event of a side impact collision. It reduces the force of impact by minimizing the distance between the vehicle and the seat, and deforms to absorb the energy before it reaches the child. To activate the protection, simply adjust the SICT on the side closest to the door.


Larger and more ergonomic seating area

The seat area is wider, has an improved shape and features a smooth front section to ensure a more comfortable and ergonomic seating position on long journeys, even for taller children. In total, the seat area is approximately 20% larger than that of similar models.

KIDFIX III M - Asiento

Easily adjustable ergonomic headrest

The headrest, 12% larger than in other models of the KIDFIX range, has an ergonomic V-shaped design so the child can sleep in the correct position. It can be easily adjusted with one hand to the correct position, just above the child's shoulders, even when the child is already occupying in the seat.

KIDFIX III M - Reposacabezas

V-shaped backrest

Designed to offer optimum support for children as they grow, the V-shaped backrest (8% wider internally than other models of the KIDFIX range) provides more space for your child's back and shoulders.

In addition, as it is tilting, the backrest automatically adjusts to match the angle of the car seat, providing a better fit and a comfortable position for the child.

KIDFIX III M - Respaldo

Installation with Isofix or seat belt

The KIDFIX III M offers two installation options:
- Isofix and 3-point seat belt (consult the list of approved vehicles).
- 3-point vehicle seat belt (universal approval)

Safe and Elegant

With its new modern design and black shell the KIDFIX III M looks superb in any car. In addition, the stylish cover gives the seat a sporty look and adds the finishing touch. Completely designed, developed and manufactured in Germany, KIDFIX III M ensures your child will travel not only safely, but also in style.

Removable Cover

It is easy for the car seat to get messy: a drink can spill or the child may get car sick. That's why we have designed a seat cover that can easily be removed and machine washed.

Excellent test results

The KIDFIX III M obtained a 1.7 ("GOOD") in the car seat test of the German consumer organization Stiftung Warentest and the German automobile club ADAC (06/2019), whose results are published by entities such as RACE or OCU in Spain. This is the best score achieved by a group 2/3 highback booster (or its equivalent in the R129 or i-Size regulation) since 2015, the year when the test protocol changed, by introducing more demanding tests. Remember that in these tests, the lower the score, the better the rating.

This device stands out especially in the safety section, in which it obtained a 1.6, a score that, taking into account the data recorded since 2015, had never been achieved by a seat in this category.

Safety score: 1.6
Usability score: 1.7
Ergonomy score: 2.3
Harmful Substances Score: 1.0


Product specifications

Dimensions: 67-84 x 54 x 43 cm (height x width x depth)
Weight: 7,5 kg
Approval: UN R44/04

KIDFIX III M - Dimensiones

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