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Essential Tips for Car Seat Safety

Keep your child rear-facing as long and possible, and ensure proper fit and installation

Older child belted into rear-facing care seat, in back seat of the car

Back in the day, babies and toddlers would be tethered to the back seat of the station wagon without much more than a strap to keep them in place. That’s if they were buckled in at all.


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Things really do change.

These days, every state in the United States has laws that require infants to ride in car seats. And those laws commonly require most elementary school-aged children to use a booster seat, too.

While the laws may differ slightly, they’re all intended to keep kids safe in the car.

And they work.

Consider these statistics from the National Safety Council: Between 1976 and 1986 — the year all U.S. states adopted car seat safety laws — more than 14,700 children under the age of 5 died in car crashes. Between 2010 and 2020, that number was closer to 5,400.

Keeping your child safe in the car is important. And there’s a lot to consider: rear-facing, front-facing, carriers, boosters… How do you know what car seat is right for your child? And what car seat safety guidelines do you need to know?

“The best car seat for your child is a matter of safety and reliability,” says pediatrician William Mudd, DO. “It comes down to choosing the right seat, installing it properly and making sure you use it right, every time.”

Dr. Mudd shares the basics of car seat safety so you can be sure your baby (and your big kid) stays safe in the car.

Car seats for newborns, infants and babies

When you’re preparing for a new baby, there’s a lot of gear to consider. And your car seat is one of the most important choices you’ll make.

There are dozens of brands and makes of car seats to choose from. But rest assured that any new car seats you find online or in stores must pass rigorous safety tests in order to be sold.


“Car seat safety is highly regulated in the U.S. All car seats have to meet federal safety standards to be sold legally,” Dr. Mudd explains. “But those standards assume proper installation and fit, so you need to make sure you’re following your manufacturer’s guidelines.”

Again, those safety measures are in place for new car seats, fresh out of the box. Car seats expire. And car seats that have been in a crash can be compromised. So, be vigilant. Whenever possible, you’re best off not using hand-me-downs when it comes to car seats.

“Never use a car seat if you don’t know its full history or a car seat that’s been involved in a crash,” Dr. Mudd advises. “And don’t use a car seat that has passed its expiration date. Generally, that’s about six years, but you can contact the manufacturer to find out what the expiration date is for your specific seat.”

Choosing your baby car seat

When you pick out baby’s first car seat, you’ll have two basic styles to choose from:

  1. Infant carrier seats have a handle that you can use to carry your baby when they’re not in the car.
  2. Convertible car seats stay in your car and can be used for infants through toddlerhood.

Whatever kind of car seat you choose, it’ll need to be rear-facing as long as possible. That means you’ll want your child to stay facing backward until they reach the maximum weight or height their car seat allows for rear-facing.

“Rear-facing is safest for babies and young toddlers and is legally required in a lot of cases,” Dr. Mudd states. “I advise parents to keep their child rear-facing as long as their car seat weight limit will allow. Switching children to forward-facing too early is, by far, the most common error I hear and see parents make when I discuss this matter at well-child checks.”

Infant carrier

Infant carrier car seats are small and have carrying handles. They can only be used rear-facing.

Most models come with a detachable base that can be left in the car. Some also can be used in stroller “systems,” which means you can remove the carrier from the car and place it right on a stroller without having to unbuckle your baby.


“Infant carriers are a popular choice for newborns and infants because they give parents and other caregivers the convenience of being able to take the baby out of the car while keeping them safely buckled in,” Dr. Mudd says. “And infant carriers may fit newborns better than convertible car seats.” Infant carriers are generally the best car seat for babies born preterm (“preemies”).

Dr. Mudd offers these tips for safely using an infant carrier:

  • Carriers are best for rear-facing for infants up to 20 pounds, but some models are safe for babies up to 30 pounds. Check your manufacturer’s instructions to be sure.
  • If you’re using a base unit, always place the carrier firmly into the base. It should click when it’s locked in place.
  • Carriers should use a five-point harness, meaning it should have straps that buckle between baby’s legs and across their chest.
  • Keep the chest clip at baby’s armpit level, not at their neck or across their tummy. “This will avoid seatbelt injuries, including soft tissue and organ damage or airway compromise due to compression of the seat belt on these areas,” Dr. Mudd explains.
  • The harness strap slots should be at or below baby’s shoulders.
  • Newborn infants’ seats should be at a 45-degree recline. Use the carrier’s built-in indicators and adjusters to ensure you’re at the correct recline.

Babies commonly fall asleep in their carriers in the car or stroller. That’s OK. But Dr. Mudd says an infant carrier shouldn’t be your baby’s primary sleep space. It’s not safe to allow babies to use an infant carrier for napping or sitting for long stretches. Infants should sleep most safely on flat surfaces.

Also, babies shouldn’t eat or drink in carriers (no propping the bottle in the car seat … or anywhere for that matter). And carriers should never be left on high surfaces, like tables or chairs.

Convertible car seats

Convertible car seats stay in place in your car.

They can be used in rear-facing mode and switched to face forward as your child grows. Convertible car seats often have higher rear-facing weight limits than infant-only car seats, with some going up to 30 or 40 pounds.

Because they’re so versatile, convertible car seats can be used much longer than an infant carrier-style car seat. But they may not be as convenient. And newborn infants may not fit as well in some convertible car seats.

If you choose a convertible car seat for your infant or your older child, consider these safety tips:

  • Keep your child rear-facing as long as the seat will safely allow, as stated in the manufacturer’s instructions.
  • Keep the harness straps at or below their shoulders.
  • The chest clip should be at armpit level, not at their neck or tummy.
  • A 45-degree recline is needed for newborns and infants while rear-facing. Older babies with good head control can have less recline.
  • Upright with no recline is best when these seats are in front-facing mode.

Installing a baby car seat

Starting with their first ride in the car, newborns and babies need to be in rear-facing car seats. And they’ll need to use the car seat for every car ride.


When possible, car seats should be installed in the back seat. If your vehicle allows, the middle of the back seat is the ideal position for a baby’s car seat. That may not work well in all vehicles, though. You’ll want to make sure the car seat is secured with appropriate anchors and the seat fits well in its position.

“When it’s possible, the middle back seat location is the best possible choice, but vehicles are all made differently. Some don’t accommodate car seats as well as others in that middle position,” Dr. Mudd notes. “If the middle seat isn’t a good fit, either side of the back seat can be safe, too, as long as the seat is well-secured.”

If your vehicle doesn’t have a back seat, you’ll need to make sure the front passenger seat airbag is turned off. Place the car seat in the middle front seat if your vehicle has side-impact airbags.

Be sure the car seat is buckled securely in the car. If you can move the car seat more than an inch side to side or toward the front of the car, it’s not tight enough. Refer to your instruction manual to use the seat belt or LATCH system to firmly buckle in the car seat or infant carrier base unit.

Dr. Mudd advises against using any products in the car seat that didn’t come from the manufacturer. That includes things like extra cushions around your baby’s head or on the car seat straps. And keep out any add-on toys. Those can injure your child in the event of a crash. If your car seat came with a newborn insert, bring the insert to your hospital room and ask for advice about whether and how to use it.

Remember, too, to remove your child’s puffy winter coat when in the car seat. If it’s cold, use a blanket, or put their coat on top of them backward (with their arms in the armholes), after buckling them into the car seat.

If you have questions about the best car seat for your child or need help installing your car seat, Dr. Mudd advises that most fire departments and hospitals can help. You can also contact a Child Passenger Safety Technician at 1.866.SEAT.CHECK (1.866.732.8243) or visit seatcheck.org.


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Well-Baby Care Visits & Developmental Milestones (Age 0-12m)

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