Most car seats are good for 6 to 10 years from the date they were manufactured, not the date you bought them. The exact lifespan varies by brand and type, with some seats lasting as few as 4 years and others up to 12. Every car seat sold in the United States has a specific expiration date set by its manufacturer, and using a seat past that date means it may no longer perform as designed in a crash.
Why Car Seats Expire
Car seats are built primarily from plastic and woven harness materials, both of which break down over time. The interior of a parked car is an extreme environment: temperatures can exceed 150°F in summer, drop well below freezing in winter, and swing between those extremes hundreds of times a year. That repeated heating and cooling causes plastic to expand and contract, gradually weakening its structural integrity. UV light streaming through windows accelerates this process. Studies from the Ecology Center found that UV exposure causes measurable chemical breakdown in car seat materials, a particular concern because seats spend so much time sitting in direct sunlight.
Beyond the materials themselves, safety standards evolve. Federal Motor Vehicle Safety Standard 213, which governs child restraints, is undergoing significant updates through 2026, including stricter crash testing requirements and new minimum weight thresholds for booster seats. A seat manufactured years ago was built to meet the standards of its era, not the improved ones that followed. Manufacturers set expiration windows partly to keep older, less rigorously tested seats from staying in circulation indefinitely.
How to Find Your Seat’s Expiration Date
Every car seat has a label or imprint showing its model number and date of manufacture. This is typically on the back or bottom of the seat’s plastic shell. Some newer models print both the manufacture date and the expiration date directly on the label, making it straightforward. If your label only shows the manufacture date, check the instruction manual or the manufacturer’s website for the seat’s usable life span.
If you use an infant carrier with a separate base, check both pieces. The carrier and the base can have different model numbers and different manufacture dates, so one could technically expire before the other.
Lifespan by Seat Type
There is no single rule for all car seats. Expiration windows range from 4 to 12 years depending on the manufacturer and model. That said, some general patterns hold across seat types.
- Infant seats (rear-facing only): These tend to have shorter lifespans, often 6 to 7 years. Since most children outgrow them by 12 to 15 months, the expiration window matters more if you plan to reuse the seat for a younger sibling.
- Convertible seats: Designed to transition from rear-facing to forward-facing, these typically last 7 to 10 years. The longer lifespan reflects the fact that a single child may use the seat for several years.
- Booster seats: Lifespans vary widely, from 6 to 10 years. Because children use boosters until they’re big enough for a seat belt alone (usually around age 10 to 12), a longer-lasting booster can serve its purpose for one child’s entire booster phase.
Always go by the specific date on your seat rather than these general ranges. Two convertible seats from different manufacturers can have expiration timelines that differ by several years.
When to Replace a Seat After a Crash
A car seat does not automatically need to be replaced after every fender bender. NHTSA defines a minor crash as one where all of the following are true: the vehicle could be driven away from the scene, the door nearest the car seat was undamaged, no passengers were injured, no airbags deployed, and there is no visible damage to the seat itself. If every one of those conditions is met, the seat can continue to be used.
If any one of those conditions is not met, the crash qualifies as moderate or severe, and the seat should never be used again. The internal structure of a car seat is designed to absorb force once. Even if it looks fine on the outside, the plastic and energy-absorbing foam may have compressed or cracked in ways you can’t see.
Buying or Accepting a Used Seat
Used car seats can be perfectly safe, but only if you can verify their full history. NHTSA recommends confirming five things before using a secondhand seat: the seat has never been in a moderate or severe crash, it still has its original labels showing manufacture date and model number, it has no open recalls, all parts are present and intact, and the instruction manual is available (most can be downloaded from the manufacturer’s site if the paper copy is missing).
To check for recalls, search the NHTSA website at nhtsa.gov/recalls. You can look up a seat by its manufacturer, model name, and model year. If a recall has been issued and the fix hasn’t been applied, contact the manufacturer for a free repair kit or replacement. Never use a recalled seat that hasn’t been corrected.
The trickiest part of buying used is crash history. There is no database that tracks whether a specific car seat was in a vehicle during a collision. You are relying entirely on the seller’s honesty. If you have any doubt, or if the seat comes from a stranger with no verifiable history, it is not worth the risk.
What to Do With an Expired Seat
An expired car seat should not be donated, sold, or left on the curb where someone might grab it. The goal is to get it out of circulation permanently. If you’re disposing of it at home, cut the harness straps and remove the padding before putting the shell in the trash. This makes it clear the seat is not usable.
A better option is recycling. Target runs a national car seat trade-in event twice a year, typically in the spring and fall. The next event runs from September 21 through October 4, 2025. You can bring any car seat, including expired or damaged ones, to a drop-off box near Guest Services at participating stores. In exchange, you get a 20% discount on a new car seat, stroller, travel system, or select baby gear, valid both in-store and online through October 18, 2025. The old seats are broken down by Target’s recycling partners and turned into materials like plastic pallets, carpet padding, and construction supplies.
Some local fire departments and waste management programs also accept car seats for recycling, though availability varies by region. A quick search for your city or county’s recycling program is worth the effort if Target’s event dates don’t line up with your timing.