
Children should use car safety seats until the age of 4. The specific details are as follows: 1. According to relevant regulations: Children under 4 years old must use child safety seats, while children under 12 years old are not allowed to sit in the front passenger seat. 2. The role of safety seats: Installing a child safety seat is essentially a restraint device for children, equivalent to the role of an adult wearing a seat belt. The four stages of the child restraint system are as follows: 1. First stage: (Rear-facing child safety seat) Infants aged 1 year and under (weight 0-13 kg) should use a rear-facing child car safety seat. 2. Second stage: (Forward-facing child safety seat) Children aged 1-4 years (weight 9-18 kg) should switch to a forward-facing child safety seat. 3. Third stage: (High-back or backless booster seat) Children aged 4-12 years (weight 15-36 kg, height under 145 cm) need to use a booster seat. 4. Fourth stage: (Adult seat belt) Children over 12 years old (weight over 36 kg, height 145 cm and above) should use an adult seat belt.

As a long-time professional dedicated to child safety, I have handled far too many tragic cases caused by premature discontinuation of car seats. Children must use safety seats when traveling by car, generally recommended until they are over 8 years old or reach a height of about 145 cm. This is because a child's body structure is still developing, and their skeletal system is immature. Using a regular seat belt too early can lead to severe injuries during sudden braking or collisions, as the belt may strangle the neck or compress the abdomen. I've seen many parents discontinue use when their children are only 5 or 6 years old, but the decision should actually depend on the child's physique: have the child sit properly and check if the seat belt comfortably crosses the shoulder and hip bones. If it instead slides to the stomach or neck, the child must continue using a car seat. Additionally, regulations vary by country; for example, Canada requires car seat use until a child weighs 80 pounds. For your child's safety, don't rush to remove the car seat. Regularly assess whether it is still appropriate, as this is crucial for reducing over 70% of child injuries in car accidents.

From the perspective of a parent who has raised two children, I remember the eldest child used a car seat until age 9 because he was small in stature, while the younger one met the requirements by age 6. The key is not just age but more importantly height and weight—generally, it's safer when they reach 145 cm or 36 kg. Every day when driving, I remind myself: only consider stopping the car seat if the child's knees can bend naturally and the seatbelt doesn't press against their neck or abdomen. A friend's 5-year-old tried stopping the car seat too early, resulting in internal organ injuries from a minor accident—a profound lesson. Car seats should start from infancy, transition to booster seats, and be used until the child's development is adequate. Never cut corners for convenience—life is priceless.

Extensive research data shows that the risk of death for children not using a safety seat increases threefold. The optimal age to discontinue use is 8-12 years, but body size must be considered: if a child's height is below 145 cm or weight under 36 kg, a safety seat is still necessary. Standard seat belts are designed for adults; children who are too small may suffer from the lap belt fracturing abdominal bones or the shoulder belt strangling their neck. I recommend regularly measuring a child's growth; if the seat belt positioning is incorrect during car rides, immediately readjust the seat. Numerous car accident cases prove this is not to be overlooked.

In the field of automotive safety, I have always emphasized that seat usage should be tailored to growth stages. Infant car seats should be used until around 2 years old, then transition to high-back boosters until ages 10-12. The ideal time to discontinue use is when the child exceeds 1.45 meters in height or 36 kilograms in weight. The testing method is simple: have the child sit with their back flat against the seat, feet flat on the floor, and ensure the seatbelt rests properly on the collarbone without shifting. I've witnessed accidents caused by premature discontinuation, where children suffered head injuries from hitting windows. Choose certified car seat brands, ensure proper installation, and regularly check for growth changes. Don't abandon protection too early.

From a daily driving perspective, I've noticed many parents asking about the appropriate age for child car seats. The common recommendation is 8 years or older or reaching 145 cm in height, but individual differences are significant: my own child used one until age 7 because he met the requirements early. The key indicator is weight—use infant mode for children under 18 kg, and only switch to regular seat belts when they reach 36 kg. Without a car seat, during emergency braking, a child could be thrown forward and hit the windshield. Choosing a reliable seat type like a convertible one and teaching proper sitting posture will greatly enhance travel safety. Don't just focus on calendar age—adjusting based on body size is crucial.


