SeatCheck
All-in-one car seat

Diono Radian 3RXT expiration

The Diono Radian 3RXT expires 10 years after its date of purchase.

Useful life
10 years
Type
All-in-one
Brand policy
8–10 years

Check your Radian 3RXT

What to know

Expires 10 years from the date of purchase, per Diono; the date of manufacture is used if the purchase date cannot be determined. Register the seat to document your purchase date.

The date of manufacture is on the seat itself. The date of manufacture is on the serial label on the seat, on the back or underside of the shell depending on model, along with the model name and number you need for Diono's support lookup and registration.

Safety note: SeatCheck summarizes manufacturer and NHTSA guidance, but the label on your own seat and its manual are the final word. When in doubt, contact the manufacturer with your model and serial number.

More about Diono seats

Full policy, label locations and crash-replacement rules on the Diono brand page.

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Frequently asked questions

How long is the Diono Radian 3RXT good for?
The Diono Radian 3RXT has a useful life of 10 years from its date of purchase. Diono counts from purchase rather than manufacture, so keep the receipt or register the seat; if the purchase date cannot be established, the date of manufacture on the label is used instead.
Where is the expiration date on the Diono Radian 3RXT?
The date of manufacture is on the serial label on the seat, on the back or underside of the shell depending on model, along with the model name and number you need for Diono's support lookup and registration.
Should I replace the Radian 3RXT after a crash?
Diono says never use a car seat that has been involved in a moderate or severe collision, applying the NHTSA definitions, and directs owners to contact Diono customer support after any crash to confirm whether the seat needs replacement before it goes back in service.

Sources