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Injury Prevention

Myths About Car Seats and Seat Belts, Checked Against the Guidance

Car Seats and Seat Belts: what people commonly get wrong, set against what published US guidance says.

Dr Amara Nwosu, PhD, RD Editor-in-chief and registered dietitian 4 min read 2 views
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Motor vehicle crashes are a leading cause of death for children in the US, and correctly used car seats and seat belts greatly reduce the risk.

Key takeaways

  • Rear-facing: keep children rear-facing as long as possible, until they reach the highest weight or height the seat allows
  • Forward-facing with harness: after outgrowing the rear-facing limits of their seat
  • Most useful single change: Read the car seat manual and the vehicle manual together.
  • Commonest mistake: Placing a rear-facing seat in front of an active airbag.
  • See a doctor if any of the signs under "When to speak to a doctor" below apply to you.

What the guidance actually says

Here is what guidance actually publishes. The rest of the page is measured against it.

Published figures for Car Seats and Seat Belts
MeasureFigure
Rear-facingkeep children rear-facing as long as possible, until they reach the highest weight or height the seat allows
Forward-facing with harnessafter outgrowing the rear-facing limits of their seat
Booster seatuntil the seat belt fits properly, usually at about 4 feet 9 inches (145 cm) tall, often between ages 8 and 12
Back seatchildren under 13 should ride in the back seat
Good seat belt fitlap belt across the upper thighs, shoulder belt across the chest and shoulder, not the neck

Where people go wrong

Common beliefs that the figures do not bear out.

  • Placing a rear-facing seat in front of an active airbag
  • Using a car seat that has been in a moderate or severe crash, or one past its expiration date
  • Moving a child to the next stage too early
  • Putting a child in a car seat while wearing a bulky winter coat

What to do instead

  • Read the car seat manual and the vehicle manual together
  • Get your installation checked by a certified child passenger safety technician
  • Register your car seat so you hear about recalls
  • Buckle up on every trip, in every seat, including short trips

The part that is genuinely uncertain

Guidance changes, and it changes because evidence does. The figures above reflect current US guidance from the bodies named at the foot of this page; where those bodies revise their position, theirs is the account to follow rather than this one.

Where to go next

When to speak to a doctor

Call 911 after any crash with injuries, and get a child checked by a doctor after a crash even if they seem fine. Never leave a child alone in a car; call 911 if you see a child alone in a hot vehicle.

Where this comes from

How this page was put together

Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarized or generalized beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.

Medical disclaimer

This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to your doctor, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 911.

Spotted something wrong? Report an error on this page. We correct on the page and say what changed.

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Dr Amara Nwosu

Editor-in-chief and a registered dietitian of fourteen years. Spent six of them in NHS outpatient clinics, which is where she learned that the advice people actually follow beats the advice that is technically optimal.

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