ISOFIX system, the universal option for baby seats

Child Restraint Systems (CRS) Child Restraint Systems (CRS)

Child seats, along with seat belts, represent the safest way to travel with young children in a vehicle. Their effectiveness in preventing fatal accidents or serious injuries is somewhere between 50 and 80 percent. Legislation on child restraint systems is very clear and the Department of Traffic regularly carries out awareness campaigns on the importance of using approved restraint systems. But it is never enough; while nearly 90 percent of children currently use child seats or seat belts, the fact is that nearly half the children who die in car or van accidents in Spain are traveling with no protection whatsoever.


Find out more. Save lives.

ISOFIX, a system that hooks onto life

Correctly installing a child seat is not always easy, and the smallest error could have serious consequences. Thanks to the ISOFIX system, child restraint systems are installed easily and the hooks guarantee the safety of even the smallest of children.

The Isofix system consists of two anchor points or rings that form part of the vehicle's bodywork. These anchors hook onto the child car seat by means of rigid bars which are pushed against the rings and locked into place with a simple click.

ISOFIX, a system that hooks onto life

These anchors are complemented by a further upper one  (Top Tether) or lower one (Support Leg) to avoid rotation or tipping. As not all cars come thus equipped, it is important to research the most appropriate CRS for you before you buy it. 

The Top Tether or upper anchor is the third anchor point for the ISOFIX system:

Top Tether

The Support Leg is the alternative to a lower anchor:

The Support Leg is the alternative to a lower anchor

The ISOFIX system is usually used with the smallest child seats, namely those that form part of Groups 0, 0+ and I. For larger seats, it is possible to find a combination of this system and the seat belt.

The ISOFIX system is usually used with the smallest child seats

Child seats in groups 0+ and I with the ISOFIX system are divided into Universal and Semi-universal, depending on where the third anchor point is located. If it is located in the upper part, the Top Tether, it is deemed to be a Universal seat, and if the anchorage point extends from the vehicle floor to the base of the seat, it is considered to be a Semi-universal seat. A Universal seat means that the seat can be used in any car that has the third upper anchorage point while a semi-universal seat can be used in many but not all vehicles. In this last case, the child restraint system manual includes a list of vehicles in which the seat car seat can be used with the ISOFIX system.