Check the car seat label or sticker for a printed expiration date
Look on the underside, back, or side of the seat shell
Check the manufacturer’s manual for the expiration period
Find the manufacture date on the seat label if no expiration date is listed
Visit the manufacturer’s website for model-specific expiration information
Contact the manufacturer with the model number and serial number
Inspect the seat for a stamped date on the plastic shell or base
Do not use the seat if the expiration date has passed