Diono car seat expiration by model
Diono car seats last 10 years from the date of purchase. Diono counts from the day you bought the seat, not the date of manufacture on the label. GarageDex lists 9 Diono seats. Find yours below; each lifespan is quoted from Diono's own page or manual.
| Seat | Type | Lifespan from purchase | Source |
|---|---|---|---|
| Radian 3QX | All-in-one | 10 years | Guide |
| Radian 3QXT | All-in-one | 10 years | Guide |
| Radian 3QXT+ | All-in-one | 10 years | Guide |
| Radian 3R | All-in-one | 10 years | Guide |
| Radian 3R SafePlus | All-in-one | 10 years | Guide |
| Radian 3RX | All-in-one | 10 years | Guide |
| Radian 3RXT | All-in-one | 10 years | Guide |
| Radian 3RXT SafePlus | All-in-one | 10 years | Guide |
| Radian 3RXT SafePlus Max | All-in-one | 10 years | Guide |
Where to find the date on a Diono seat
Look for a white sticker on the plastic shell, usually on the back, the side or underneath. It lists the model number and the date of manufacture, and newer seats often print the expiration date on the same label or stamp it into the plastic.
When to replace a seat before it expires
- After a moderate or severe crash. NHTSA lists the conditions under which a seat can stay in use after a minor one: car seat use after a crash.
- When the label with the date of manufacture is missing and the maker cannot tell you the date from the serial number.
- When the seat has a recall that has not been fixed. Register the seat with its maker so recall notices reach you.
- When your child is past the seat's height or weight limit, whatever the date.
Before you throw an expired seat out, cut the harness straps and write EXPIRED on the shell so nobody picks it up and uses it.
Other brands
Every lifespan on this page is quoted from the seat maker's own product page, manual or expiration guide, and the quote was checked against that page on the date shown. If the label on your seat prints an expiration date, that date wins.