Common Car Seat Mistakes (And How to Fix Them)

Nearly half of all car seats are used incorrectly. Not because parents aren’t trying, but because the rules are genuinely confusing. Here’s what to check and how to fix it fast.

Are you installing the seat correctly?

The seat moves more than an inch

After installation, grab the seat at the belt path and try to move it side to side and front to back. More than one inch of movement means it’s too loose. Tighten the seat belt or LATCH straps and recheck.

You’re using the wrong belt path

Convertible seats have two belt paths: one for rear-facing, one for forward-facing. They are not interchangeable, and using the wrong one can look completely fine to the untrained eye. Check your manual every time you change your child’s seating position.

You’re using LATCH and the seat belt at the same time

Both are valid methods, but use only one at a time unless your seat’s manual explicitly says otherwise. Using both simultaneously can create competing tension in a crash. Pick one method and stick with it.

You’re skipping the top tether

About half of parents skip this, which is worth fixing. On a forward-facing seat, the top tether connects to an anchor in your car and reduces how far your child’s head moves forward in a crash by up to 6 inches. Most cars made after 2000 have tether anchors built in. Check your car manual for the anchor location, attach the strap, and tighten it.

The recline angle is off

For rear-facing seats, angle matters a lot. Too upright and a newborn’s head can flop forward and restrict their airway. Too far back and crash protection is reduced. Most seats have a built-in angle indicator. Check it every time you install.

Is the harness fitting correctly?

The harness is too loose

Try to pinch the harness webbing at your child’s shoulder after buckling them in. If you can gather any fabric between your fingers, it’s too loose. Tighten until you can’t pinch anything. The harness should lie flat against your child’s chest with no slack.

The chest clip is in the wrong position

It should sit at armpit level, full stop. Too low and your child could be ejected from the harness in a crash. Too high and it risks neck injury. A quick look before every drive takes two seconds.

The harness slots are at the wrong height

For rear-facing, straps should exit at or below your child’s shoulders. For forward-facing, at or above. Check this every few months as your child grows, it’s easy to forget to adjust.

Are you transitioning at the right time?

One of the most common mistakes is turning kids forward-facing too soon. The guidance from the AAP is clear: keep your child rear-facing until they reach the height or weight limit of their specific seat, not just until they turn 2.

The reason is physics. Rear-facing distributes crash forces across the back, neck, and head. Forward-facing puts much more stress on the neck and spine. The same logic applies to the booster transition: a harnessed seat is safer than a booster for as long as your child fits in it, so don’t rush it.

What else is worth knowing?

Bulky coats and car seats don’t mix

Puffy coats compress in a crash, leaving the harness suddenly too loose. The fix: buckle your child in without the coat, tighten the harness using the pinch test, then lay the coat over them like a blanket. A thin fleece under the harness is fine for most seats, but check your manual.

Be cautious with secondhand seats

A seat that’s been in a moderate or severe crash may have invisible structural damage. Most seats also expire 6 to 10 years from the manufacture date, printed on the seat itself. If you’re accepting a secondhand seat, only take one from someone you trust completely who can confirm it has never been in a crash, is within its expiration date, has all original parts, and has no open recalls.

Skip aftermarket accessories

Strap covers, head inserts, and mirror clips that didn’t come with your seat haven’t been crash-tested alongside it. They can interfere with harness fit, become projectiles in a crash, or void your seat’s safety certification. Only use accessories that came packaged with the seat.

Keep kids in the back seat

A rear-facing seat in the front with an active airbag can cause serious injury if the airbag deploys. Kids should ride in the back seat until at least age 13, and the middle rear seat is the safest spot when possible.

Not sure your seat is installed correctly? Get a free inspection.

NHTSA maintains a directory of certified Child Passenger Safety Technicians (CPSTs) who offer free car seat inspections, in most cases. A CPST will check everything: installation, belt path, recline angle, harness fit, chest clip position, and tether use. Even parents who think they’ve done everything right often have at least one thing to correct. It’s not a test, it’s a resource.

Does car insurance cover car seat replacement after an accident?

After a crash, your car seat may need to be replaced even if it looks fine. Most manufacturers recommend replacement after any moderate or severe crash, and some recommend it after any crash at all. Check your seat’s manual for the manufacturer’s specific guidance.

With Lemonade car insurance, your car seat is covered under your collision coverage. As long as the damage meets your state’s requirements for replacement, we can help with the costs to replace it. Not sure what your policy covers? It takes just a few minutes to check in the app.

A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC.  The statements do not apply to policies underwritten by other carriers.