Yes, all car seats expire at some point. You can find the expiration date of your Orbit car seat or base by checking the production information label. They can be found on either the back of the car seat or behind the base.
Infant Car Seat: If you view the backside of your Infant Car Seat you will notice a velcro panel. Open the panel and view a silver rectangular sticker on the left seam.
Infant Car Seat Base: If you view the back of the of the seat base, you will see a silver rectangular sticker with expiration date.
Unless specifically stated Orbit car seats are good till the last day of the year it expires.