How To Tell When A Car Seat Expires | A Quick Safety Check

A car seat’s expiration date is printed on a label or stamped into its plastic shell, usually on the bottom, back, or side.

You probably remember the exact day you installed your child’s car seat for the first time. The straps were tight, the base clicked in properly, and you felt that small wave of relief. Years later, adjusting that same seat for a growing toddler, you might wonder if it’s still good to use. The plastic looks fine. The harness works. But a car seat doesn’t stay safe forever.

Manufacturers design these seats to meet strict federal standards, but only for a defined period. Materials like plastic, foam, and webbing change over time. Knowing where to look for the expiration date — and what to do if you find it’s past — is a straightforward safety step that many parents overlook.

Where To Find The Expiration Date On Your Car Seat

The expiration date is usually printed right on the car seat itself. Start by checking the bottom, back, or side of the seat. Most manufacturers place a white sticker or a plastic label in one of these spots.

On some seats, the date is stamped directly into the plastic shell. Safety 1st, for example, prints the expiration on the bottom of the seat into the plastic itself. Britax calculates the expiration from the date of manufacture (DOM) found on the serial label.

If the sticker or stamp shows only a date of manufacture, add 6 to 10 years to get the approximate expiration. Graco states its seats are designed for 7 to 10 years of safe use from the DOM. The exact range varies by brand, so checking the label is the most reliable method.

Why The Six-Year Rule Surprises So Many Parents

Most people assume a car seat lasts as long as it looks sturdy. Plastic seems permanent, and foam doesn’t look like it’s changing. The six-to-ten-year expiration window feels arbitrary until you understand what’s happening under the surface.

Car seat materials naturally break down over time. Regular use, temperature swings inside a parked car, and sun exposure all play a role. These environmental factors can degrade the plastic shell, harness webbing, and energy-absorbing foam in ways you can’t see by looking at the seat.

Here’s what happens to each material as the seat ages:

• Plastic shell: Repeated heating and cooling cycles can make the polymer more brittle over years, potentially reducing its ability to hold together in a crash.
• Energy-absorbing foam: The EPS or EPP foam that cushions your child during impact can lose density and compression resistance, which may reduce its ability to absorb crash forces.
• Harness webbing: Sun exposure and regular tension can weaken the polyester fibers over time, which may affect strap strength during a sudden stop.
• Label adhesive: Stickers and labels can peel or fade, making it harder to read the manufacturing or expiration date as years pass.
• LATCH connectors: Metal adjusters and plastic lock-offs can wear down from repeated use, potentially affecting a secure installation.

All five of these changes happen gradually, which is why the manufacturer sets a cutoff well before the material risks become significant.

How To Check When You Can’t Find The Sticker

Sometimes the original label peels off or the plastic stamp is hard to read. If that happens, look for the date of manufacture (DOM) on the same sticker. The Barton County Health Department recommends families check their seat’s expiration date and, if the DOM is the only visible date, calculate forward 6 to 10 years. You can also check car seat expiration date guidelines that explain the full process.

If you can’t find any date at all — no DOM, no expiration stamp, no readable label — the safest choice is to stop using the seat immediately. A seat with an unknown age may not meet current safety standards, and the materials may have degraded without visible signs.

Most major brands also list expiration information on their websites. Graco, Britax, Evenflo, and Chicco all provide model-specific guides. If you still have the manual or can look up the model number online, you can often find the exact expiration window for your seat.

If you find a DOM but no expiration year listed separately, the general rule is 6 to 10 years from that date. When in doubt, contacting the manufacturer with the model number is a reliable way to get a straight answer.

What To Do With An Expired Car Seat

Finding an expired seat doesn’t mean you need to just throw it in the trash. Safe disposal takes a couple of extra steps so nobody else picks it up thinking it’s still usable.

1. Remove the fabric cover — Cut it into a few pieces so it can’t be reassembled. Fabric can be recycled or discarded separately.
2. Cut the harness straps — Snip through all five webbing sections. Straps are the strongest indicator of a functional seat, so destroying them makes the seat clearly unusable.
3. Mark the plastic shell — Write “EXPIRED — DO NOT USE” on the shell with a permanent marker. Evenflo specifically recommends this step so the seat is not resold or donated.
4. Remove all foam padding — Some foams can be recycled locally; others need to go in the trash. Check with your local recycling facility for EPS or EPP foam rules.
5. Take the seat to a designated drop-off — Some Target and Walmart stores have car seat recycling events, and certain municipalities accept them at recycling centers. Target’s annual car seat trade-in program often offers a discount on a new seat.

If you don’t have a local recycling option, the cut-and-label approach is the standard fallback. A seat that’s clearly marked and physically broken can’t end up in a secondhand store or a neighbor’s trunk.

What Makes An Expired Seat Unsafe For Your Child

Car seat materials such as plastic, foam, and harness webbing naturally degrade over time. Regular use puts repeated stress on the harness adjuster and buckle. Temperature changes — especially heat inside a parked car — can make plastic more brittle than it was when new. Sun exposure can weaken the fibers in the webbing.

Chicco explains that environmental factors like heat and sunlight are primary reasons for expiration dates, as these forces can degrade materials even when the seat looks pristine. According to the car seat material degradation research, a seat in perfect visual condition may have significant internal weakening. The seat might install fine and feel solid, but in the split second of a crash, those micro-changes in the plastic and foam could affect how well the seat protects your child.

There’s also the issue of evolving safety standards. Expiration dates mean a seat’s design is based on the testing standards from the year it was made, not today’s crash-test requirements. A new seat may include side-impact protection, better energy-absorbing foam, or improved harness systems that an older model simply doesn’t have.

The Bottom Line

A car seat’s expiration date is one of those details that’s easy to forget but simple to check. Flip the seat over, find the label or stamp, and note the years. If it’s expired — or you can’t find a date at all — cutting the harness, marking the shell, and replacing it is the safest route. The 10-minute check could make a real difference in a crash.

If your car seat has passed its expiration date, a certified child passenger safety technician at your local fire station or hospital can help you choose the right replacement and install it properly — take the old seat’s label with you so they can confirm the exact expiration year.