Car Seat Expiration Estimator
Car seats don't last forever — plastics fatigue, harnesses fray, and safety standards move on. Pick your seat, enter the manufacture date stamped on it, and get an estimated expiration window computed from manufacturer-published lifespan rules.
Last reviewed: 2026-08-26. Recall status checked 2026-08-26 against CPSC & NHTSA databases: no active recalls affect this tool's guidance. Standards context: every US seat must conform to FMVSS 213; JPMA-certified seats also meet ASTM practices, and the AAP advises retiring any seat past its expiration or crash history.
Based on manufacturer-published lifespan rules; verify physical label. Where our verified records hold no published lifespan rule for a model, the result is an honest UNKNOWN — we do not guess safety dates. Source register in Data Sources.
Estimate your car seat's expiration window
Every seat model above appears in our evidence database with manufacturer-documentation provenance. Only models with a published lifespan rule in those verified records produce a date estimate — everything else returns UNKNOWN by design. For depth on individual models, see our convertible car seat rankings and the Graco Extend2Fit review.
Manufacturer document identifiers by brand (Graco, Britax, Chicco, Nuna, UPPAbaby)
Where a seat's manual or model number is on file in our verified records, we cite it so you can match your exact seat — see also the Extend2Fit vs ClickTight comparison:
| Seat (as listed above) | Manufacturer identifier on file | Source · retrieved |
|---|---|---|
| Graco Extend2Fit Convertible | User guide PD348857A; shell model 1954477 (per NHTSA recall record 16C002) | download.gracobaby.com/ProductInstructionManuals/PD348857A.pdf · 2026-08-23 |
| UPPAbaby Mesa V3 | User-guide doc ID 1003-MSA; SKU family 1003-MSA-US-ADA / EVE / GRE / JMS / SAV | US-EN_1003-MSA_MesaV3Manual_251226.pdf (back.uppababy.com); uppababy.com storefront · 2026-08-26 |
| Nuna PIPA rx | productID CF12508600XXX; US MPNs CF12508608MCN / CF12508609CVR / CF12508609GRN / CF12508610CDR / CF12508610PNE / CF12508610CCR / CF12508610TND | nunababy.com structured product data · 2026-08-26 |
| CYBEX Cloud T | MPN 10108858 (Cloud T with Load Leg Base) | cybex-online.com product JSON-LD · 2026-08-26 |
| Chicco NextFit Max Zip Air | Product manual on file (chiccousa.com digital library) | chiccousa.com manuals library · 2026-08-23 |
Seats without an identifier above stay blank — we don't guess part numbers. Britax, Diono, Evenflo, Maxi-Cosi and Graco SnugRide identifiers await manufacturer-document retrieval and will be added when verified.
What our verified records hold today
| Seat | Published lifespan rule in verified records | Status |
|---|---|---|
| Britax B-Safe Gen2 (infant) | 6 years from date of manufacture — Britax product page (us.britax.com, retrieved 2026-08-23) | Rule published |
| Britax One4Life ClickTight | 10 years from date of manufacture — Britax expiration guide + product page (us.britax.com, retrieved 2026-09-15) | Rule published |
| Chicco NextFit Max Zip Air | 8 years from date of manufacture — NextFit MAX instruction manual PDF (chiccousa.com, retrieved 2026-09-15) | Rule published |
| Chicco KeyFit 35 (infant) | 6 years from date of manufacture — KeyFit 35 instruction manual PDF (chiccousa.com, retrieved 2026-09-15) | Rule published |
| Diono Radian 3RXT | 10 years — Diono support (diono.zendesk.com, retrieved 2026-09-15); Diono counts from date of purchase, so the manufacture-date estimate is the conservative floor | Rule published |
| Evenflo Revolve360 Extend | 10 years from date of manufacture — Revolve360 Extend FAQs (evenflo.com, retrieved 2026-09-15) | Rule published |
| Graco 4Ever DLX | 10 years from date of manufacture — product page (gracobaby.com, retrieved 2026-09-15) | Rule published |
| Graco Extend2Fit Convertible | 10 years from date of manufacture — product page (gracobaby.com, retrieved 2026-09-15) | Rule published |
| Graco SnugRide 35 Lite (infant) | 7 years from date of manufacture — SnugRide 35 Lite manual + Graco help-center useful-life article (retrieved 2026-09-15) | Rule published |
| Nuna RAVA | 10 years from date of manufacture — RAVA user manual PDF (nunababy.com, retrieved 2026-09-15) | Rule published |
| UPPAbaby Mesa V3 (infant) | Manuals conflict: 2025-05 print 7 years, 2025-12 revision 10 years from date of manufacture (back.uppababy.com, retrieved 2026-09-15) — the tool shows the conflict and the conservative figure | Sources conflict |
| Cybex Sirona S | 10 years from date of manufacture — Sirona S product-page FAQ (cybex-online.com, retrieved 2026-09-17) | Rule published |
| CYBEX Cloud T (infant) | 6 years from date of manufacture — Cloud T product-page FAQ (cybex-online.com, retrieved 2026-09-17) | Rule published |
| Maxi-Cosi Mico XP Max (infant) | 8 years from date of manufacture — Mico XP / Mico XP Max instruction manual (consumercare.maxicosi.com, retrieved 2026-09-17) | Rule published |
| Nuna PIPA rx (infant) | No model-specific manufacturer-published year count — the PIPA rx manual defers to the expiration-date label on the seat/base; Nuna publishes no numeric rule for this model — shown as UNKNOWN, not guessed | Unknown |
UNKNOWN does not mean "never expires." Every car seat has an expiration — it simply isn't in our verified records for that model, so this tool refuses to invent one. The physical label or instruction manual is authoritative for every seat.
Where to find the expiration on your actual seat
- The date of manufacture is stamped on the seat itself — molded into the plastic shell or printed on a white sticker, commonly on the underside/base, the back, or a side of the shell. It may read "Date of Manufacture," "DOM," or "MFD."
- The expiration is stated in the instruction manual and often on the same label or molded into the shell ("Do not use after …"). If the manual is lost, manufacturers publish current manuals on their support sites — for example, our UPPAbaby MESA V3 review documents locating the official manual PDF.
- If you can't find a date at all: treat the seat as unverified history. Combined with unknown crash history, most safety instructors advise replacing it rather than guessing.
- Never use a seat that has been in a crash, regardless of its expiration date, and register your seat with the manufacturer so recall notices reach you. Check current status via NHTSA (nhtsa.gov/recalls) or our recall monitoring page.
Sources
- Britax — B-Safe Gen2 product page (retired listing): "6-yr expiration" per page spec snippet — https://us.britax.com/shop/retired/britax-b-safe-gen2-infant-car-seat — retrieved 2026-08-23. Stored as
safety_attributes.expiration_years = 6 (verified)in evidence-db/infant-car-seats.json. - Car-seat model roster, brands, and full names: data/evidence-db/convertible-car-seats.json and data/evidence-db/infant-car-seats.json (manufacturer-product-page provenance, retrieved 2026-08-23–24).
- Manufacturer manuals on file for related verification: Graco Extend2Fit user guide PD348857A (https://download.gracobaby.com/ProductInstructionManuals/PD348857A.pdf) and Chicco NextFit Zip Max product manual (chiccousa.com) — retrieved 2026-08-23.
- Verification methodology: How We Compare · full source register: Data Sources.