Arizona Child Car Seat Laws: Rear-Facing Rules, Fines, and Exemptions

Arizona child car seat laws require every child under eight to ride in a child restraint system, with the exact type depending on age and height. Kids under five must be in a car seat. Kids ages five through seven must stay in a restraint (usually a booster) until they reach 4’9″ tall. A violation carries a $50 base fine that climbs to roughly $77.50 once mandatory surcharges are added, though the penalty can be waived if you buy a compliant seat and show the court proof.

Who Needs a Car Seat in Arizona

A.R.S. § 28-907 splits the requirement into two tiers based on the child’s age and size.

Children under five years old must be secured in a child restraint system in any motor vehicle on Arizona highways. The statute itself doesn’t specify rear-facing versus forward-facing; it only requires that the seat meet federal safety standards.
Children ages five, six, and seven must be in a child restraint system if they are shorter than four feet nine inches. In practice this is a belt-positioning booster that raises the child so the lap and shoulder belt sits properly across the body.

Once a child turns eight or reaches 4’9″, whichever comes first, the car seat law no longer applies and the child moves to the vehicle’s standard seat belt.¹

The seat itself has to meet the federal performance and design standards in 49 C.F.R. § 571.213. A restraint without a label showing compliance with that standard doesn’t satisfy Arizona’s law, even if it fits the child physically.¹

Rear-Facing Rules and Front Seat Safety

Arizona’s statute is silent on when a child should face the rear versus the front, so federal guidance fills that gap. The National Highway Traffic Safety Administration recommends children under one always ride rear-facing, and that they stay rear-facing past age one until they hit the maximum height or weight allowed by the seat’s manufacturer.²

The legal minimum and the safety recommendation are not the same thing. Arizona law only requires that a child under five sit in “a child restraint system.” Crash data supports keeping children rear-facing longer, because rear-facing seats provide better head and neck protection for infants and toddlers than forward-facing ones do.

A rear-facing seat should never go in a front seating position when the vehicle has an active passenger-side airbag. If the vehicle is a two-seater with no back row, the passenger airbag has to be deactivated before a rear-facing seat is installed there. Arizona law does not set a minimum age for riding in the front seat, but safety organizations recommend children stay in the back seat until 13, because front-seat airbags and belts are engineered for adults.

Fines and How to Get the Penalty Waived

A child restraint violation is a civil traffic infraction with a $50 base penalty.¹ The amount you actually pay runs higher. Arizona applies mandatory surcharges to civil traffic penalties, and once those are added under § 12-116.01, the minimum total lands at roughly $77.50 before any other court fees.³

There is a way to avoid the penalty entirely. If you obtain a compliant car seat after being cited, you can show the court that your vehicle is now properly equipped. The statute specifically identifies mailing a purchase receipt to the court officer as a sufficient showing, and if the court accepts the proof it will not impose the civil penalty.¹

Primary Enforcement

This is a primary enforcement offense. An officer can stop you solely because they observe what appears to be an unrestrained child. During the stop the officer will ask each child’s age and height to figure out whether anyone should be in a car seat. If the answers show no violation, the officer cannot detain you further unless another violation is in play, and the stop itself does not give probable cause to search the vehicle.¹

The Ticket Stays in Traffic Court

One piece of the statute catches parents off guard. Evidence of a child restraint violation, and even the requirements of § 28-907 themselves, cannot be used in any other judicial proceeding. If your child is hurt in a crash and litigation follows, the other side cannot introduce your car seat ticket to argue negligence. The violation matters legally only in the traffic case.¹

Exemptions

The statute lists six situations where the car seat requirement does not apply. They are narrower than most parents assume.

Motor vehicles originally manufactured without passenger restraint devices (pre-1972 vehicles).
Motor vehicles that qualify as recreational vehicles under A.R.S. § 41-4001.
A person operating a commercial motor vehicle with a valid commercial driver license.
A person who must transport a child in an emergency to obtain necessary medical care.
Authorized emergency vehicles transporting a child for medical care.
Transporting more than one child under eight when the vehicle physically cannot fit enough car seats, as long as at least one child is properly restrained and you’ve secured as many others as space reasonably allows.

Note what’s not on the list. There’s no blanket exemption for school buses, public transit, or large passenger vehicles. The booster requirement for kids five through seven applies only in vehicles designed for ten or fewer passengers, so older children fall outside that specific provision in larger vehicles. The under-five rule, though, applies to any motor vehicle with only the six exemptions above.

Seat Belts After Age Eight

When a child ages out of the car seat requirement, Arizona’s general seat belt law takes over. Under A.R.S. § 28-909, the driver of a passenger vehicle (model year 1972 or later, designed for ten or fewer passengers) must ensure every passenger under sixteen wears a properly adjusted and fastened lap and shoulder belt while the vehicle is in motion.⁴

The driver carries legal responsibility for an unbelted minor. A parent or guardian riding along can also be cited. The moment a child moves out of a booster, the seat belt requirement is not optional.

Expiration Dates, Recalls, and Free Inspections

A car seat that met federal standards when it was made isn’t safe forever. Plastics degrade from temperature swings and UV exposure, and standards evolve. Manufacturers set expiration dates, usually printed on a label on the bottom or back of the seat, or molded into the plastic shell. Some list a specific date; others give a number of years from the manufacture date. Using an expired seat can still fall short of the requirement that the restraint meet current federal standards.

Recalls are the other issue. Manufacturers must notify registered owners and provide free corrective actions. You can register a seat through the card that comes with a new one, through the manufacturer’s website, or through NHTSA’s site. To check whether a seat you already own has been recalled, contact the manufacturer or call NHTSA at 1-888-327-4236.²

Installation is where a lot of otherwise careful parents slip. In the Phoenix area, the Phoenix Fire Department runs four fitting stations that inspect car seats for free by appointment. Call 602-495-KIDS (5437) to schedule.⁵ Elsewhere in Arizona, many local fire departments and hospitals offer similar programs, and NHTSA maintains a searchable database of certified inspection stations at nhtsa.gov.

1
Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice; Child Restraint Fund; Definitions
2
National Highway Traffic Safety Administration (NHTSA). Car Seats and Booster Seats
3
Arizona Legislature. Arizona Code 12-116.01 – Surcharges; Remittance Reports; Fund Deposits
4
Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
5
City of Phoenix. Child Safety Seats