All Evenflo car seats expire 6 years following their date of manufacture, with a few exceptions: the Symphony car seat line expires 8 years after the date of manufacture, because it is an all-in-one car seat with extended use from infant seat through belt-positioning booster. The Evenflo Transitions and Evenflo Evolve 3-in-1 combination car seats also expire 8 years after the date of manufacture due to their extended use from harnessed car seat through no back booster. Safety standards change over time as restraint technology develops. Expiration dates help ensure that you are not using a car seat that may be secondhand, has been in an accident or has missing or damaged parts; plus, an expiration date provides a gentle reminder that it is time to buy a new seat with the latest technology and safety features.  Please refer to your Evenflo car seat’s date of manufacture (DOM) label to tell you exactly when your seat will expire.