What is ISOFIX attachment?
Mia Smith
Published Feb 25, 2026
What is ISOFIX attachment?
ISOFIX is the international standard for child car seat fittings in cars. It is a metal attachment that is built into your vehicle’s seating by the car manufacturer. The system allows you to simply connect the ISOFIX child seat onto the ISOFIX positions located in the seats of your car.
What is ISOFIX installation?
ISOFIX is an internationally standardised car seat fitting system. It automatically locks your car seat – or car seat base – onto two metal clips (ISOFIX fixing points) between the vehicle seat of your car. No need to use the seat belt anymore.*
How do ISOFIX bases work?
How does ISOFIX work? ISOFIX car seats have two arms or connectors on the back of the seat that hook, or anchor onto small metal bars fixed to the frame of your vehicle. By pushing the seat backwards onto these anchor points, the seat locks directly onto the chassis of your vehicle.
What are ISOFIX connectors?
Isofix connectors fix the booster seat into the car in the same way as above, but both the child and seat are also held in place by the adult seatbelt.
Who invented ISOFIX?
Britax-Römer
The Isofix child seat mounting system, which creates a solid connection between the child seat and the vehicle, was introduced in 1997, after development carried out by Britax-Römer, a car seat maker, and Volkswagen, which first introduced Isofix in the fourth-generation Golf.
What is the difference between ISOFIX and Isofit?
ISOFIX and ISOFIT are child safety seats that are attached to the vehicle body with connectors. With ISOFIX seats, the child is secured by means of a five point safety harness; with ISOFIT by means of the vehicle’s 3 point seat belt. An additional distinguishing feature is the classification of the child safety seat.
Is my Isofix base fitted correctly?
Fitting Isofix child seats Check that your Isofix seat is approved for use in your particular vehicle. Isofix seats will not fit in every car with Isofix points. Locate the Isofix connectors (two prongs sticking out of the back) on the child seat or base. Push the connectors into the Isofix slots in the car seat.
Is Isofix safer than seatbelt?
Is Isofix safer? Independent tests show that Isofix mounted seats are extremely safe. Rather than relying on a belt, the car seat is fixed directly to the child seat base. That means there’s less movement in the seat in the event of an accident, particularly a side on impact.
Are there different types of ISOFIX?
There are three types of ISOFIX seats that you can get your hands on – the only thing that is different is that particular seats will only fit certain cars: Vehicle-Specific Approval – Only compatible with specific vehicles, using a two-point connection system.
When was Isofix first introduced?
1997
What is the Isofix anchoring system?
ISOFIX is International Organization for Standardization standard ISO 13216, which specifies the anchoring system for Group 1 child safety seats. It defines standard attachment points to be manufactured into cars, enabling compliant child safety seats to be quickly and safely secured. ISOFIX is an alternative to securing the seat with seat belts.
What does ISOFIX stand for?
Isofix (styled ISOFIX) is the international standard for attachment points for child safety seats in passenger cars. The system has other regional names including LATCH (“Lower Anchors and Tethers for Children”) in the United States and LUAS (“Lower Universal Anchorage System”) or Canfix in Canada.
Are there different types of isofix attachments?
However, some child seat manufacturers are beginning to offer true Isofix type attachments in the United States. In the European standard, there are also various installation categories: “universal”, “vehicle-specific” and “semi-universal”.
What is the maximum combined weight for ISOFIX?
Isofix is designed to secure a maximum combined weight (comprising both seat and child) of 33kg. The center-to-center distance between the anchors of ISOFIX (and also LATCH) systems is 280 mm.