ISOFIX makes it easier to safely fit a child seat to your car by using standardised anchor points rather than the seat belt.
Properly securing a child seat can significantly reduce the risk of injury in the event of an accident. Two primary methods exist for installing child car seats: ISOFIX and seat belts. Understanding the differences between these systems can help you make an informed decision about which is best for your family.
What is ISOFIX?
ISOFIX, short for International Standards Organisation Fix, is a standardised system for installing child car seats without using seat belts. It utilises fixed anchor points built into the car's structure, allowing compatible child seats to be securely attached. This system aims to reduce the risk of incorrect installation, which is a common issue with seat belt-secured seats.
When did ISOFIX become mandatory?
In the UK and across Europe, ISOFIX has been included in many vehicles since the early 2000s. However, its mandatory inclusion in new cars was introduced through two key regulations:
- UNECE Regulation No 14: This regulation required all new vehicle models launched from November 2012 to be fitted with ISOFIX points. Additionally, from February 2013, all newly produced vehicles had to include ISOFIX as standard.
- UN Regulation No 129 (i-Size): Adopted in November 2012, this regulation introduced enhanced child seat safety standards, including the requirement that certain child seats must use ISOFIX to improve crash protection and reduce the risk of incorrect installation. It officially came into effect on 9 July 2013.
While these regulations made ISOFIX a legal requirement for new cars, many older vehicles may still have ISOFIX points. If you're looking to buy a used car, check for the ISOFIX logo on the seat fabric, labels, or plastic covers hiding the anchor points. Some two-seater sports cars, such as the Porsche Boxster and Mazda MX-5, now also feature ISOFIX on the front passenger seat—just be sure to disable the airbag when fitting a child seat in the front.
What ages are ISOFIX seats suitable for?
ISOFIX seats are designed for children from birth up to approximately 12 years old, depending on the seat's specifications. Rear-facing ISOFIX seats are recommended for younger children, while high-back booster seats with ISOFIX connectors are available for older children, providing additional stability by anchoring the seat to the car while the seat belt secures the child.
Why were ISOFIX seats invented?
ISOFIX was developed through a collaboration between seat manufacturer Britax-Römer and Volkswagen in the 1990s to address the high rate of incorrect child seat installations using seat belts. Studies indicated that a significant number of child seats were improperly installed when using seat belts, compromising safety.
ISOFIX aims to simplify the installation process, reducing the likelihood of user error, and was later standardised by the International Organisation for Standardisation (ISO). A study carried out by the German Insurance Institute found that 95% of ISOFIX child seats were fitted correctly, compared to just 30% using the old system.
How do ISOFIX seats work?
ISOFIX seats have metal connectors that latch onto the ISOFIX anchor points in your car. To install, you simply align the connectors with the car's anchor points and push until you hear a click, which indicates a secure connection. Many ISOFIX seats also feature indicators that turn green when they're correctly installed. To remove the seat, typically, you press a release button to disconnect from the anchor points.
What type of ISOFIX seats are there?
There are three main types of ISOFIX seats:
- Universal: These seats are compatible with most cars and usually have a top tether or support leg to prevent forward movement in a crash.
- Semi-Universal: These are similar to universal seats but might not fit every vehicle. It's a good idea to check the car compatibility list provided by the seat manufacturer.
- Vehicle-Specific: Seats designed for specific car models. Always consult the manufacturer's guidelines to ensure your car is compatible.
Why is ISOFIX better than using a seat belt?
When correctly installed, both ISOFIX and seat belt-secured child seats provide high levels of safety. However, ISOFIX reduces the risk of incorrect installation thanks to its straightforward attachment system.
Can I just use seat belts rather an ISOFIX?
When installed correctly, seat-belt-fitted child seats are perfectly safe, protecting children in the same way they do adults. But if the seat belts aren't fitted correctly over the child seats, children may not be fully protected in the event of a crash.
With ISOFIX mounts, the connection between the seat and the car is more rigid, so there’s less chance of making a mistake when fitting the seat to the car. But it’s not a legal requirement to have an ISOFIX seat.
ISOFIX points were first seen on cars in 1997. By 2001 most cars had ISOFIX points fitted (or available as an option) and by 2013, all new cars were required to have them fitted.
ISOFIX is an internationally standardised car seat fitting system that locks your baby seat or seat base onto the seats of your car. It will hold a baby seat in place even in side impacts – unlike older seats held by seatbelts – and it should also make a baby seat easier to fit.
ISOFIX has been standard on all new cars since the mid-2000s so if there is a high chance, your car will have it fitted. Originally ISOFIX had the two anchor points but some cars also have a top tether point – usually on the back of the seat.
If you're not sure if your car is equipped with ISOFIX:
- Look for labels: Many cars have ISOFIX labels or buttons where the backrest meets the seat cushion
- Feel for anchor points: Gently run your hand along the gap between the seat back and base to locate the metal anchor points
- Consult the manual: Your car's owner manual will tell you whether ISOFIX points are installed and where
Secure your child with the Volkswagen Child Seats | Volkswagen
Loading...
More car features explained
With lots of abbreviations and tech to get your head around, our expert guides explain all.
