Traffic Safety · Car Seat & Booster
Car Seat & Booster Laws in Arizona
When your child can move from a booster to a seat belt in Arizona — plus rear-facing, front-seat, and the fine, with the law kept separate from best practice.
Check your child's stage in Arizona
Enter age, height, and weight. We show the Arizona law separately from best practice.
4′9″ = 57 in. Enter only the boxes you have — this state uses required ages 5–7 while 4′9″ or shorter; exit at age 8 or taller than 4′9″.
Arizona does not legislate rear-facing vs forward-facing by age — it requires a restraint appropriate per the manufacturer's instructions. AAP/NHTSA best practice (not Arizona law): rear-facing to age 2+, then a harness, then a booster.
Educational guide to the minimum legal requirement, not legal or safety advice. Best practice is often stricter than the law. Always follow your car seat’s manufacturer instructions, and confirm the current rule with the official source below — last reviewed 2026-07-09.
The four stages in Arizona
Each rung is tagged Law or best practice.
Arizona sets no rear-facing age. §28-907 requires a child under 5 to be properly secured in a child restraint system; orientation is not prescribed by age.
AAP/NHTSA best practice: keep a child rear-facing until at least age 2 — a recommendation, not Arizona law.
Not separated by age — a child under 5 needs a restraint, but the type is not set by age.
Best practice: a harness seat, then a booster — not Arizona law.
A booster or restraint is required for a passenger at least 5, under 8, AND 4′9″ or shorter. Reaching 4′9″ before age 8 exits. Children under 5 need a full restraint, not a booster.
Exit rule: required ages 5–7 while 4′9″ or shorter; exit at age 8 or taller than 4′9″. The adult belt must fit — lap low across the hips, shoulder belt across the chest.
Front seat, the fine & the source
Seating rule, the exact booster logic, and any recent change.
Arizona has no front/back seat law — §28-907 applies to each passenger regardless of position. Back-seat-until-13 is a recommendation, not Arizona law.
| Booster exit logic | Age 8 or 4′9″ — whichever first |
| Seat belt OK | Age 8, or earlier once taller than 4′9″ |
| First-offense fine | $50 A $50 civil penalty, waivable on proof of obtaining a proper restraint afterward. |
| Statute | A.R.S. §28-907 |
What Arizona parents get wrong
Arizona is the most lenient of these 15 states. Section 28-907 requires a child restraint only for children under 5, and a booster only for children 5–7 who are 4′9″ or shorter — so a tall or older child leaves the requirement quickly. Arizona does not legislate rear-facing by age, which means "rear-facing until 2" is AAP/NHTSA best practice here, not law. It also has no front-seat law: the statute applies to each passenger regardless of seating position, so the familiar back-seat-until-13 advice is a recommendation, not something an officer can cite. The booster exit is age 8 or 4′9″, whichever comes first, and the fine is a waivable $50.
Common questions
When can a child stop using a booster in Arizona?
At age 8, or once the child is taller than 4′9″ — whichever comes first. The booster requirement applies only to children 5–7 who are 4′9″ or shorter.
Does Arizona require rear-facing car seats by age?
No. Arizona requires a restraint for children under 5 but does not prescribe rear- vs forward-facing by age. Rear-facing until 2 is a best-practice recommendation, not Arizona law.
Is it illegal for a child to ride in the front seat in Arizona?
No. Arizona has no front/back seat law — §28-907 applies regardless of seating position. Back-seat-until-13 is a recommendation, not Arizona law.
What is the fine for a car-seat violation in Arizona?
A $50 civil penalty, which can be waived if you show you obtained a proper child restraint afterward.
Not legal advicePlainStatute provides plain-language summaries of public law for general information only. This is not legal advice. Statutes change; always confirm current requirements with the official source linked above before acting.