Car Seats Do Expire — Here's Why and What to Check

Yes, car seats expire, and the expiration date matters for safety

Car seats have an expiration date printed on them, usually between 6 and 10 years from the date of manufacture. After that date, the seat should not be used, even if it looks fine. The plastic and foam materials degrade over time from heat, cold, and normal wear, which weakens the seat's ability to protect a child in a crash.

Manufacturers set expiration dates based on testing of how long their materials hold up under real-world conditions. A car seat that has been through multiple summers in a hot car or winters in a cold garage will degrade faster than one stored indoors, but you cannot tell by looking whether it has reached the end of its safe life. The expiration date is a safety standard, not a suggestion.

Key Takeaways

• Every car seat has an expiration date printed on a label, usually on the back or bottom, showing when it was manufactured plus the number of years it is safe to use.
• After the expiration date passes, the plastic shell and foam padding have degraded enough that the seat may not protect a child properly in a crash, even if the seat looks undamaged.
• Expiration dates vary by brand and model — some seats last 6 years, others 10 — so check your specific seat rather than assuming a standard timeline.
• If you are buying a used car seat, ask for the manufacture date and calculate when it will expire before you purchase it.

How to find the expiration date on your car seat

The expiration date is printed on a label attached to the car seat itself, not in the manual. On most seats, this label is on the back of the seat or underneath it, sometimes in a location that is hard to see. You may need to remove the seat from the car and tilt it to find the label clearly.

The label shows the manufacture date (month and year the seat was made) and how many years from that date the seat is safe to use. For example, if a seat was manufactured in March 2018 and has a 10-year lifespan, it would expire in March 2028. If it was manufactured in March 2018 and has a 6-year lifespan, it would expire in March 2024.

Write down the expiration date and set a phone reminder for a few months before it arrives. You will need to replace the seat before that date, not on it.

Why car seats expire even when they look fine

Car seats are made of plastic shells, foam padding, and metal or plastic frames. All of these materials break down over time when exposed to temperature changes, sunlight, and humidity — the normal conditions inside a parked car. The plastic becomes more brittle and less able to absorb the force of a crash. The foam padding compresses and loses its cushioning ability.

These changes happen whether the seat is used every day or sits in a garage. A seat that has never been in a crash can still be unsafe to use after its expiration date because the materials themselves have weakened. There is no way to inspect a car seat and know whether the internal materials have degraded enough to matter — the expiration date is the only reliable measure.

Manufacturers also update safety standards and design over time. A car seat made 10 years ago may not meet current crash-test standards, even if the materials were still intact.

What to do if your car seat has expired

Stop using the expired seat immediately. Do not donate it, sell it, or pass it to another family. Most manufacturers ask that expired seats be thrown away because they should not be used by anyone.

You will need to buy a new car seat before your child's current seat expires. If you are on a tight budget, look for sales around major holidays or check whether your state or local health department offers car seat programs that provide seats at reduced cost or free. Some hospitals and fire departments also distribute car seats or offer discounts through partner programs.

If you have an expired seat and need a replacement right away, contact your local health department or call 211 to ask about emergency car seat programs in your area.

Buying a used car seat — what to check before you purchase

If you are considering a used car seat, ask the seller for the manufacture date before you buy it. Calculate when it will expire and decide whether you will get enough use out of it to make the purchase worthwhile. A used seat that expires in six months is not a good deal, even if the price is low.

Also ask whether the seat has been in a crash. A car seat that has been through a collision should not be used again, even if the damage is not visible. The internal structure may be compromised in ways that are not obvious from the outside. Some manufacturers will replace a seat free of charge if it has been in a crash — check the manufacturer's website or call their customer service line to ask.

Avoid buying a used car seat from an unknown seller online or at a secondhand store unless you can verify the manufacture date and crash history. It is safer to buy new or to borrow from someone you know and trust who can tell you the seat's full history.

Different expiration timelines by brand and model

Car seat expiration dates are not standardized across all manufacturers. Some brands set a 6-year lifespan, others 8 years, and some 10 years. The variation depends on the materials used and how the manufacturer tested them for durability.

You cannot assume that all car seats last the same length of time. Check the label on your specific seat to know when it expires. If you have multiple car seats in your household, they may have different expiration dates.

If you have lost the label or cannot read it, contact the manufacturer directly with your seat's model number. You can usually find the model number on the seat itself or in the manual. The manufacturer can tell you the manufacture date and expiration date based on that information.

Frequently Asked Questions

Can I use a car seat after it expires if it has never been in a crash?

No. The expiration date is based on how long the materials are safe, not on how many times the seat has been used. Even a seat that looks brand new and has never been in a crash should not be used after its expiration date because the plastic and foam have degraded over time.

What should I do with an expired car seat?

Most manufacturers recommend throwing away expired car seats so they cannot be used by anyone else. Some retailers like Target or Buy Buy Baby have car seat recycling programs where you can drop off old seats. Check your local waste management website to see if your area has a special collection day for car seats.

If I store a car seat indoors in a climate-controlled room, does it last longer?

Storage conditions may slow degradation, but manufacturers set expiration dates assuming normal use and storage. A car seat stored indoors will likely last longer than one left in a hot car, but you still cannot know how much longer just by looking at it. Follow the manufacturer's expiration date regardless of storage.

How do I know if a used car seat was in a crash?

Ask the seller directly. If you buy from someone you do not know well, there is no reliable way to verify the seat's history. If you suspect a seat has been in a crash, contact the manufacturer — some will inspect it for damage if you send photos or the seat itself.

Do car seats expire if they are never used?

Yes. The materials degrade from temperature and humidity changes even if the seat sits in a box. An unopened, unused car seat will still expire on the date printed on the label.