Of course, it’s important to make savings wherever you can – but you should never compromise on safety. The condition of your child’s car safety seat can greatly influence the consequences of a collision for your child. But how long does a brand-new child restraint system actually last? Does material fatigue come into play even with something like a car safety seat?

We all know that nothing lasts forever. The car safety seats from CYBEX, however, have been designed to such high quality and technological standards that they offer safety and comfort for at least the entire duration of the age group for which they have been developed. The car seats for babies and toddlers can even be used for twice as long as the age group they are designated for.

Group 0+ (birth to 18 months) = 1.5 years

The infant carriers from CYBEX (ATON, ATON 2, ATON 3) can be used for a second child, i.e. up to a maximum of 3 years.

Group 0+/1 (birth to 4 years) = 4 years

Our combination and reboard seat SIRONA can also be used for an additional child, i.e. for a maximum of 8 years.

Group 1 (approx. 9 months to 4 years) = approx. 3 years

The JUNO-FIX, our specialist in meeting the needs of children in this age group, can likewise be used for an additional child and a second period, i.e. for a maximum of 6 years.

Group 1/2/3 (approx. 9 months to 12 years) = approx. 11 years

Seats that grow with the child such as the PALLAS 2-FIX, PALLAS 2, PALLAS-FIX and PALLAS meet the safety criteria of several groups and can thus be used right up until the child is no longer required by law to use a child restraint system (up to a height of 150 cm). After such a long period (around 11 years), during which the seat has provided your child with maximum protection and comfort in all situations, it is fair to say that the seat should no longer be used.

Group 2/3 (approx. 3 to 12 years) = approx. 9 years

The child safety seats designed for older children, including SOLUTION X2-FIX, SOLUTION X2, SOLUTION X-FIX and SOLUTION X, should not be used for more than 9 years.

The time periods given are based on the date of purchase. After this point in time, the seats are exposed to great fluctuations in temperature and high levels of light intensity in the car. This triggers ageing and fatigue, even in high-quality, age and temperature resistant materials and plastics, such as those used by CYBEX.


Over time and particularly in a collision, hairline cracks can form in the shell of the seat. These signs of wear and tear can barely be seen with the naked eye yet continue to grow through continued usage.

A seemingly harmless crack can suddenly lead to complete material failure. This can happen spontaneously in a car crash due to the immense forces to which the seat is exposed on impact. Alternatively, these tiny cracks may grow unnoticeably due to constant use, exposure to sunlight or other factors that have a negative effect on the material over time.

This is why you should only ever use second-hand seats that are no older than 6 years, whose origin is known (e.g. from siblings, relatives or good friends) and have never been involved in an accident of any sort, even minor.

A used seat must function equally as well as a brand-new one and should always fit both your child and car properly. Otherwise, it cannot offer your child sufficient protection!

Our blog contains lots of other interesting information about child safety when on the road: