Arizona Child Car Seat Laws: Requirements, Fines, and Exemptions

Arizona’s child car seat laws require every child under eight years old to ride in a car seat or booster seat, unless the child has already reached 4’9″ tall. The rule lives in A.R.S. § 28-907, and breaking it is a civil traffic infraction with a $50 base fine that works out to about $77.50 once mandatory surcharges are added. You can usually get that penalty waived by showing the court you bought a compliant seat after the citation.

Who Needs a Car Seat in Arizona

The statute sets two tiers based on the child’s age and height.

Under five years old: Must be secured in a child restraint system in any motor vehicle on Arizona highways, with only the limited exemptions listed below.
Ages five through seven and shorter than 4’9″: Must ride in a child restraint system, which in practice usually means a belt-positioning booster that lets the vehicle’s lap and shoulder belt sit correctly on the child’s body. This tier applies only in vehicles designed for ten or fewer passengers.

A child who turns eight or reaches 4’9″, whichever comes first, is out of the car seat requirement and moves to the regular seat belt.¹

Whatever seat you use has to meet the federal performance and design standards in 49 C.F.R. § 571.213. If the seat doesn’t carry a label showing compliance with that standard, it doesn’t satisfy Arizona law, even if it fits the child.¹

Rear-Facing vs. Forward-Facing

Arizona’s statute doesn’t say when a child should face the rear versus the front. Federal guidance fills that gap. The National Highway Traffic Safety Administration recommends children under one year old always ride rear-facing, and that children remain rear-facing past age one until they reach the maximum height or weight the car seat manufacturer allows.²

The legal minimum and the safety recommendation are different things here. Arizona law only requires a child under five to be in a child restraint system. Crash data shows rear-facing seats give far better head and neck protection for infants and toddlers, which is why safety organizations push parents to keep children rear-facing as long as the seat allows.

Where the Seat Goes

A rear-facing car seat should never go in a front seating position in a vehicle with an active passenger-side airbag. A deploying airbag strikes the back of a rear-facing seat with enough force to cause fatal injuries to a child. In a two-seater with no back seat, the passenger-side airbag has to be deactivated before you install a rear-facing seat up front.

Arizona law sets no minimum age for riding in the front seat. Safety organizations recommend children stay in the back seat until age 13, because front-seat airbags and restraint systems are engineered for adult-sized bodies. That’s a guideline, not a legal requirement.

The Fine for a Car Seat Violation

A child restraint violation is a civil traffic infraction, not a criminal offense. The base penalty is $50.¹ You pay more than that in practice. Arizona adds mandatory surcharges to civil traffic penalties of 42%, 7%, and 6% of the base fine, each applied to the $50 base rather than stacked on each other. Those surcharges add $27.50 under § 12-116.01, bringing the minimum total to roughly $77.50 before any additional court assessments.³

The $50 base goes into Arizona’s child restraint fund, which pays for car seat safety programs.¹

You Can Be Stopped Just for This

Child restraint is a primary enforcement violation. An officer can pull you over solely because they see what looks like an unrestrained child. During the stop, the officer will ask the age and height of each child in the car to figure out who needed a seat. If no violation actually occurred, the officer can’t detain you further unless something else is going on, and the stop by itself doesn’t give probable cause to search your vehicle.¹

How to Get the Fine Waived

Arizona gives you a way out. If you buy a compliant car seat after being cited, you can show the court your vehicle is now properly equipped. The statute specifically mentions mailing the purchase receipt to the court officer as a sufficient showing. If the court accepts the proof, it will not impose the civil penalty.¹

Exemptions

Six specific situations are carved out of the car seat requirement. They’re narrower than most people assume.

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

School buses, public transit, and other large passenger vehicles aren’t on the list. The booster seat rule for ages five through seven only applies in vehicles designed for ten or fewer passengers, so those older children aren’t covered by that specific provision when riding in larger vehicles. The under-five rule, by contrast, applies broadly to any motor vehicle, with only the six exemptions above.

After Age Eight: The Seat Belt Rule

Once your child ages out of the car seat requirement, A.R.S. § 28-909 takes over. The driver of any passenger vehicle (model year 1972 or later, designed for ten or fewer passengers) must make sure 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 with the child can be cited as well. The moment your child moves out of the booster, the seat belt is not optional.

Expired Seats and Recalls

A car seat that met federal standards when it was built may not stay safe forever. Plastics degrade from heat and UV exposure, and standards change. Manufacturers typically set an expiration date, printed on a label on the bottom or back of the seat or molded into the plastic shell. Some give a specific date, others state “do not use after” a certain number of years from manufacture. An expired seat can run afoul of Arizona’s requirement that the restraint meet current federal standards.

Recalls are the other reason to pay attention, especially with used or older seats. Manufacturers must notify registered owners and provide free corrective action. Register your seat through the card that came with it, through the manufacturer’s website, or through NHTSA. To check whether a seat you already own has been recalled, contact the manufacturer or call NHTSA at 1-888-327-4236.²

Free Car Seat Inspections

Even parents who read the full manual benefit from having a certified technician check the installation. In the Phoenix area, the Phoenix Fire Department operates four fitting stations where you can bring your seat for a free inspection by appointment. Call 602-495-KIDS (5437) to schedule.⁵

Outside Phoenix, many local fire departments and hospitals across Arizona run similar inspection programs. NHTSA keeps a searchable database of certified inspection stations at nhtsa.gov to help you find one nearby.

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