How Long Are Infant Car Seats Good For?

Car seats have an expiration date — typically 6 years from the date of manufacture, though some seats are rated up to 10 years. The clock starts when the seat was made, not when you bought it or first used it. To find your seat's limit, look for a sticker on the shell or a date stamped into the plastic, and check the manual for the exact lifespan. If the seat is past that date, replace it, even if it looks brand new.

That can feel wasteful, so it helps to understand why the rule exists. It is not an arbitrary sell-by date — it is tied to how the seat ages, how safety standards change, and how the manufacturer can (and cannot) support the seat over time.

Where to find the date

Every car seat sold in the US is labeled with the information you need. Look in these places:

• A manufacture date sticker.Usually on the bottom or side of the seat, often reading "Date of Manufacture" with a day, month, and year.
• A stamped date in the plastic.Some shells have the date molded directly into the plastic on the underside — useful if a sticker has worn off.
• The manual and an expiration label.The manual states the useful life (for example, "do not use after 6 years from date of manufacture"), and many seats also carry a separate "do not use after" date printed on the shell.

If you can find only the manufacture date, add the lifespan from the manual to get the expiration date. When a seat has no legible date anywhere and you cannot confirm its age, the safe assumption is that it should not be used.

Why car seats expire

There are three real reasons behind the date, and together they explain why a seat that looks fine can still be unsafe to keep using.

Materials age.A car seat lives through years of temperature swings — baking in a hot car in summer, freezing in winter. Over time that cycling makes the plastic shell more brittle, so it may not absorb crash forces the way it did when new. Harness webbing, buckles, and foam degrade too. None of this is necessarily visible, which is exactly why there is a date rather than a "replace when it looks worn" rule.

Standards and knowledge change.The federal crash standard for child restraints, FMVSS 213, and the broader understanding of best practice both evolve. A seat built years ago met the standard of its day but may lack refinements — in harness design, labeling, or side-impact features — that later seats include. The expiration window keeps very old designs out of service.

Support and recalls have a horizon.Manufacturers keep records, stock replacement parts, and track recalls for a defined period. Once a seat is past its lifespan, the maker may no longer supply parts or reliably reach owners about a safety recall. An expired seat is also one you cannot easily verify against the current recall list. Check any seat against the CPSC recall list (linked in our sources below) when buying or accepting any used gear — but a seat past its date should be retired regardless.

When to replace after a crash

Age is not the only reason to replace a seat. A car seat that was in the vehicle during a crash may need to be replaced even if it looks undamaged, because the forces it absorbed can compromise it in ways you cannot see.

NHTSA describes a "minor" crash after which a seat can generally continue to be used only when allof the following are true: 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; and there is no visible damage to the car seat. If any one of those is not true, treat it as a moderate-to-severe crash and replace the seat. When in doubt, replace it — and always check the seat manufacturer's own guidance, since some brands direct you to replace after any crash.

A few practical rules

• Be cautious with used seats. A hand-me-down can be fine if you know its full history, it is within its expiration date, it has never been in a crash, it has all its parts and labels, and it has not been recalled. If you cannot confirm all of that, do not use it.
• Do not use a seat past its date. Even a pristine-looking expired seat should be retired for the material and support reasons above.
• Register your seat. Registering with the manufacturer is how they reach you directly if the seat is ever recalled.

When it is time to replace or move up, our roundups can help you choose the next seat: the best infant car seats for the newborn stage, and the best convertible car seatsfor the years after. And when you do move up, keep your child rear-facing as long as the seat allows — our guide on rear-facing versus forward-facing explains why.