Can you use a seatbelt extender to secure a car seat in a car?

Diono does not recommend using a seatbelt extender. The safety of seatbelt extenders has not been verified in crash testing of any Diono car seats or boosters.

If you’d like to find out more about the Diono Radian 3QXT visit our store: https://store.diono.ca/radian-3qxt/