Find answers to the most frequently asked questions about our car seats, top-tether use and more below.


Do all of Diono car seats have side impact protection?

Yes, all Diono car seats provide reinforced side- impact protection, and some models offer the increased protection of an adjustable head support. Currently, there is no U.S., Canadian or European regulatory side- impact testing requirements. A manufacturer can claim “side- impact safety” without meeting any standard. Diono’s RadianRXT and Monterey™ models were side- impact tested to the widely accepted German standard established by ADAC, Europe’s largest automobile club.

Do all car seats sold in Canada meet Transport Canada standards?

All seats sold on the Canadian market must bear the National Safety Mark attesting to the fact that the authorized manufacturer has certified that the seat meets the prescribed Canadian safety standards. Transport Canada monitors the manufacturers’ testing and certification programs through its own independent compliance-testing program.

What is the National Safety Mark?

The National Safety Mark is a Crown trademark, incorporating a unique alphanumeric identified that the Minister of Transport authorizes and assigns to individual manufacturers to affix to all car seats intended for the Canadian market. The National Safety Mark represents the manufacturer’s declaration that the car seat complies with all applicable safety standards and regulations in effect on the date of manufacture.

What is NCAP (New Car Assessment Program) crash testing?

All vehicles in the U.S. and Canada must undergo NCAP crash testing at 56 km/h to simulate a severe car accident. Child car seats are only required to crash test at 48 km/h. At 56 km/h, an NCAP test can have almost double the crash impact force of a standard 48 km/h car seat crash test. NCAP is a “severe-accident” survivability crash test for a car seat and the child who must depend on it. Radian seats successfully NCAP crash test at both 20.5 kg RF and 30 kg FF without relying on the top tether.

Does the 30 kg lower anchor limit apply to all UAS equipped vehicles?

The 30 kg lower anchor limit for Radian car seats is only for vehicles manufactured after September 1, 2005 when vehicle lower anchor strength requirements were increased.

Can I order replacement SuperLATCH™ parts for a Radian seat and use it up to the higher UAS capacities?

Replacement SuperLATCH™ components can be ordered, but Radian seats can only be used up to the UAS capacity stated on the stickers that are affixed to the seat.

Why does Radian have a removable rear-facing base?

The unique base of the Radian simplifies and stabilizes rear-facing installation. Radian performs extremely well in rear-facing crash tests. A removable base allows Radian to be positioned lower on the vehicle seat for improved forward-facing safety and convenience.

Can I fit 3 Radian seats in my vehicle?

Fitting 3 Radian seats side by side requires a minimum interior width of 124 cm (130 cm for minivans), as measured from door arm rest to door arm rest across the back seat.

Are Diono car seats approved for use with Ford Motor Company’s Inflatable Seat Belts?

As of September 2016, Diono has approved the use of all current models of Diono convertible car seats and booster seats with Ford Motor Company’s Inflatable Seat Belts. This allowance is retroactive to previous Radian convertible and Monterey booster models.