Skip This: Used Car Seats From Strangers

Why we don't recommend buying used car seats

A car seat's crash protection depends on its shell, foam, harness webbing, and buckle all being structurally uncompromised. Any of those can be silently damaged by:

• A crash (even a minor fender-bender — NHTSA recommends replacing most seats after any moderate or severe crash)
• UV exposure (sun-baking weakens plastic and webbing)
• Expiration (most seats expire 6-10 years from manufacture; materials degrade)
• Drop damage, recalls, unknown history you can't verify from a stranger

A used seat from a stranger on Facebook Marketplace is a seat whose history you cannot verify. You are trusting that the seller is honest about every car accident, drop, and storage condition the seat has seen. That's a bet most CPSTs (Child Passenger Safety Technicians) will advise you not to make.

When a used car seat is actually okay

A car seat from a trusted source is generally fine if every single of the following is true:

1. You know the full history — it came from a sibling, close friend, or direct family member.
2. It has never been in a crash, even a minor one.
3. It has all original parts, the original manual, and the manufacturer's label showing the manufacture date.
4. It's within its expiration date.
5. It has not been recalled — check the CPSC recall database by model number.
6. It has no cracks, worn webbing, frayed straps, sticky buckles, or stored-outside UV damage.

Even then, get a CPST to verify installation and fit. Free seat checks are available at most fire stations.

What to buy instead

A new car seat costs less than you think. The Cosco Scenera NEXT is routinely under $60 and meets all current federal safety standards. The Graco 4Ever DLX — a 4-in-1 that takes a child from infant through booster — is under $300 new and lasts 10 years.

If budget is tight, some hospitals, WIC offices, and nonprofits distribute free or low-cost new car seats to parents who qualify. Ask your pediatrician's office for a local referral.

FAQ

What about a seat from Craigslist marked 'never in an accident'?

You have no way to verify that. And you're trusting a stranger's recollection of an event that could be silent damage (rear-ended at a stoplight, previous owner never thought it counted). Don't.

Can I just replace the cover or straps if they look worn?

Only with the manufacturer's original replacement parts, using the manufacturer's instructions. Aftermarket or generic parts are not crash-tested with that seat.

What's the deal with car-seat trade-in events?

Target, Walmart, and some manufacturers run trade-in events where you bring an old seat (expired, crashed, whatever) and get a discount on a new one. These are great: the old seat is destroyed responsibly, you get credit, nobody buys a compromised seat on the secondhand market.