When Do Car Seats Expire? How to Find the Date and Why It Matters

Most car seats expire 6 to 10 years after the date they were manufactured, not the date you bought them. The exact date is printed on the seat itself, usually on a sticker or molded into the plastic. If there's no expiration date listed, the American Academy of Pediatrics says to treat 6 years from the manufacture date as the cutoff.

That's the short answer. If you're standing over a hand-me-down seat right now, or you've just realized the one in your trunk is older than you thought, the rest of this walks you through finding the date and deciding what to do.

Last updated: June 24, 2026.

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First, this is a normal thing to not know. Car seats don't beep at you when they expire, and the date is printed somewhere you'd never think to look. Plenty of careful parents are driving around on a seat that quietly aged out a year ago. Checking takes about two minutes, and once you've done it, you can stop wondering.

Do car seats really expire?

Yes. And it isn't a marketing trick to sell you a new one. There are real reasons, and it helps to know them so the date means something to you rather than feeling like a rule you're being handed.

An expiration date is the manufacturer's own guidance on the expected useful life of the seat. As one major maker (Britax) explains, the date is set "from the date of manufacture" and reflects how long the seat is built to perform (Britax). Here's what's behind that:

• Plastic ages. A car is a brutal environment: baking in summer sun, freezing in winter, swinging through humidity. Over years, that cycle can wear on a plastic shell, and materials that have aged don't perform the way they did when new.
• Standards move forward. Safety regulations and crash-testing methods are updated over time. They don't change often, but an older seat may not have been built to the current standard.
• Parts go missing and labels fade. A decade-old seat may be missing a clip, a pad, or the instruction manual. And the label with its model number and recall information can wear off, which matters if that seat is ever recalled.

A seat doesn't suddenly turn dangerous the day after its date passes. The date is simply how long the maker is willing to stand behind it.

How long do car seats last?

It depends on the type of seat. The range is genuinely wide, which is why checking your specific seat beats relying on a rule of thumb. As one major manufacturer (Britax) publishes for its own range (Britax):

• Infant seats and bases: around 6 years
• Convertible and all-in-one seats: up to 10 years
• Harness-to-booster seats: around 9 years
• Belt-positioning boosters: up to 10 years

Other brands set their own limits — some shorter, some longer — so always go by the date on your seat, not a number you read somewhere.

How do I find the expiration date on my car seat?

The date is on the seat. You're looking for one of two things: a stated expiration date, or a date of manufacture (DOM) you can count forward from.

1. Check the white sticker (the serial label) first. Newer seats often print the expiration date right on it. Where the label sits depends on the seat type: on infant seats it's often on the underside near the harness slots; on convertibles, on the back beneath the tether hook (Britax).
2. If there's no expiration date, find the manufacture date. It's on that same label, and on many seats it's also stamped or molded directly into the plastic shell on the bottom or side.
3. Do the math. Add the seat's lifespan to the manufacture date. If you can't find the lifespan, the AAP's fallback is 6 years from the date of manufacture (AAP).

When in doubt, the manufacturer's manual or website lists the lifespan for your exact model.

What should I do with an expired car seat?

If yours has passed its date, don't keep using it. And don't pass it along to another family, either. The AAP is direct here: do not use a car seat that is too old, has been in a crash, has been recalled, has any cracks in its frame, or is missing parts (AAP).

To retire it so no one fishes it out of the trash to reuse: check whether your area or a local retailer runs a car-seat recycling or trade-in program (many do, seasonally). If you're throwing it away, removing the padding and cutting the harness straps is a common way to make sure it can't be reused.

A quick word on crashes (and a common myth)

One thing worth clearing up, because the all-or-nothing version causes a lot of needless expense and worry: a car seat does not automatically have to be replaced after every fender-bender. NHTSA considers a crash minor — and the seat reusable — only when all of these are true (NHTSA):

• The vehicle could be driven away from the crash.
• The door nearest the car seat was undamaged.
• No one in the vehicle was injured.
• The airbags did not deploy.
• There's no visible damage to the seat itself.

If any one of those isn't true, treat it as a moderate-to-severe crash and replace the seat. And always check your manufacturer's manual. Some makers tell you to replace after any crash, full stop, and their instruction overrides the general guidance.

Buying or accepting a used car seat

A secondhand seat can be perfectly safe. But only if you know its full story. Before you say yes to a hand-me-down, confirm it has never been in a crash, has all its parts and labels, comes with its manual, isn't under recall, and hasn't expired (NHTSA used car seat checklist). If you can't verify the history — for instance, from a stranger online — the safer call is to skip it.

This is exactly the kind of thing that's easy to miss on a busy week. Pouch keeps a free, public directory of baby and toddler product recalls, including car seats, so you can check a model in a minute and, if you want, register the seats you own and be told if one is ever recalled. Recall information is always free: browse the directory.

Common questions

Can I use a car seat one day after it expires? The expiration is a guideline, not a switch that flips, but it exists for good reasons. Once a seat is past its date, the manufacturer no longer stands behind it. So the safest answer is to replace it rather than start counting days.

Where is the manufacture date on a car seat? On the white serial label (location varies by seat type) and often molded into the plastic on the bottom or side of the shell. If there's no stated expiration date, count 6 years forward from the manufacture date (AAP).

Do car seat bases expire too? Yes. Infant-seat bases carry their own expiration — often around 6 years — printed on their own label. Check the base separately from the carrier.

My seat looks perfectly fine. Does it still expire? Yes. Materials can age from years of heat and cold without looking any different, and an older seat may not meet current standards, which is why the AAP says not to use a seat that's too old, by date rather than by appearance (AAP).

Sources

• American Academy of Pediatrics (HealthyChildren.org) — Car Seat Safety Checkup
• NHTSA — Car Seat Use After a Crash / Replacing Car Seats
• NHTSA — Used Car Seat Safety Checklist
• Britax — Car Seat Expiration and Date of Manufacture guide
• Pouch recall directory