We recommend the use of our car seats during the course of 8 years, from when it is installed in your car. For example, it can be in store for 2 years and then used for 8 years. The baby car seat has a life span of 6-7 years in use. The reason as to why we have set this time limit is because the plastic parts are more sensitive to differences in temperatures when installed in the car, but also because we at Axkid are continuously working with the development of our products.