Britax One4Life — expiration
All-in-one car seat.
Britax ties the One4Life to a 10-year useful life — clickTight convertibles (Poplar, Poplar S), all-in-one seats (One4Life, One4Life Slim) and belt-positioning boosters (Highpoint, Skyline), per Britax's expiration guid.
Expiration: 10 years from date of manufacture
Britax's own wording — source, checked 2026-08-27.
Read your label against the formula
Find the date of manufacture on the seat's label, then add 10 years — the same month. As Britax applies it:
| Manufactured in | Reaches its stated life in |
|---|---|
| 2019 | 2029 (same month as your label) |
| 2020 | 2030 (same month as your label) |
| 2021 | 2031 (same month as your label) |
| 2022 | 2032 (same month as your label) |
| 2023 | 2033 (same month as your label) |
| 2024 | 2034 (same month as your label) |
| 2025 | 2035 (same month as your label) |
| 2026 | 2036 (same month as your label) |
Where the date is on this seat
Britax's expiration guide puts the serial label under the car seat cover, on the top side of the ClickTight compartment.
On the top side of the ClickTight® compartment, under the car seat cover (lift the positioning layer, open the ClickTight, and pull back the car seat cover to view)
Source, checked 2026-08-27.
- Underside of the seat base
- Side of the shell, below the cover edge
- Back of the shell
Recalls
Run the label's model number and date of manufacture through NHTSA's recall lookup — it is the authoritative record for any seat, this one included.
The label on your seat is authoritative; this page is a reference.