Diono Radian 3QX
The ultimate 3 across All-in-One car seat from birth to booster (4 – 120 lb / 1.8 – 54 kg). Featuring 3 stages of complete rear facing protection and all new Diono Safe+™ engineering to provide the next generation in car seat safety.
NZ$ 822.25 including GST
NZ$ 715.00 excluding GST
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From baby's first journey the radian® 3QX provides complete protection, with Safe+™ newborn travel high wedge, Safe+™ 2-in-1 infant positioning liner and Safe+™ Anti-slip harness pads for added comfort and safety.

As your child grows the Safe+™ steel anti-rebound bar increases stability and reduces rebound rotation by up to 50%, so you can keep them safely rear facing for longer, up to 22.7kg (approx. 4 years old).

As they transition to forward facing, the Safe+™ easy adjust 12 position headrest is contoured to improve child head containment and provides a 22% increase in occupancy range from the radian R series.

3 STAGE REAR FACING PROTECTION - Features Safe+™ newborn travel high wedge, Safe+™ 2-in-1 infant positioning liner and Safe+™ steel anti-rebound bar for complete rear-facing protection.

REAR FACING FOR LONGER - Designed and engineered with all new Diono Safe+™ protection. Now you can keep your child rear facing for even longer up to 22.7kg (approx. 4 years old).

SAFE+™ ENGINEERING - Radian® 3QX is subjected to a combination of the most rigorous crash tests to make sure we have the safest seat possible.

SLIM-FIT DESIGN FITS 3 ACROSS - Built with our famous Radian® slim fit design, to fit 3 across in most vehicles without compromising child or passenger comfort.

6 LAYERS OF SIDE IMPACT - Following the latest European research and technology in crash energy management, the Radian® 3QX features 6 layers of side impact protection. Interlocking EPS and EPP foam, high density plastic and steel reinforcement combine to create ultimate side impact protection, without compromising 3 across fit in most midsize vehicles.



4-50 lb / 1.8-22.7 kg


22-65 lb / 10-29.5 kg

Booster mode

40-120 lb / 18-54 kg

Seated torso height

7.5-16.5″ / 19-42 cm

Overall maximum height

up to 57″ / 144.8 cm


25.8 lb / 11.7 kg