Evenflo Big Kid — expiration

Booster seat.

Evenflo doesn't tie the Big Kid to a single figure on a page we can cite , and its stated useful life depends on the seat: 10 years for all Evenflo car seats and booster seats, per Evenflo's article dated March 17, 2026; Evenflo adds on that page that a seat manufactured before January 2025 may have a different dat · 6 years for all Evenflo car seats — the default on Evenflo's FAQ page, which is still live and states a different figure from the March 2026 articl · 8 years for the Symphony car seat line, named as the exception in Evenflo's FAQ answer "How long is the life span of my Evenflo car seat?" — the page whose 6-year default Evenflo's March 2026 article contradicts; Evenflo's own tiebreaker is the date on the seat you ow · 8 years for the Evenflo Transitions and Evenflo Evolve 3-in-1 combination car seats, named in the same Evenflo FAQ answer — the page whose 6-year default Evenflo's March 2026 article contradicts; Evenflo's own tiebreaker is the date on the seat you ow · 10 years for the Evenflo Gold Revolve360 all-in-one, named in Evenflo's article "Your Most Common Car Seat Questions, Answered!" (March 28, 2022), which states a 6-year default for other seats in the same passage; Evenflo's own tiebreaker is the date on the seat you ow. The stamp on your seat settles it — the moulded statement beginning "Do not use this child restraint after…" or the manual's own line.

Evenflo has two contradictory useful-life statements live on its own site. Its article "When Do Car Seats Expire?", dated March 17, 2026, states 10 years for all Evenflo car seats and booster seats. Its FAQ page (evenflo.com/pages/faq, under "How long is the life span of my Evenflo car seat?") still states the older rule: 6 years by default, 8 years for the Symphony line and for the Transitions and Evolve 3-in-1. A third, older Evenflo article repeats the 6-year default while giving the Gold Revolve360 10 years. Evenflo does not reconcile these on any page checked, so every statement is listed here separately and none is treated as the winner. Evenflo's own tiebreaker is the line to follow: "If you own an Evenflo seat manufactured before January 2025 it may have a different expiration date. Follow the date on the seat you own." The Symphony and Big Kid manuals state no number of years at all — they point the owner to the expiration date found on the date-of-manufacture label. Where Evenflo names a model with a figure, that statement is what this site carries for the model: the Symphony, Transitions, Evolve and Gold Revolve360 each appear by name in one of these Evenflo statements. The Big Kid does not appear by name in any of them, so it carries no figure here.

If the stamp is worn or missing, ask Evenflo with the model name and the numbers on the label: Evenflo support, 1-800-233-5921.

Where the date is on this seat

Per the Big Kid and Big Kid LX booster owner's manuals, the model number and date of manufacture are found on the bottom of the booster seat. Neither manual states a number of years.

When you contact us, please have the product model number and date of manufacture (found on the bottom of the booster seat).

Source, checked 2026-08-27.

1. Underside of the seat
2. Back of the backrest (highback) or under the arm (backless)