Need help?Do you have a question about the Diono Radian 3QXT+ and is the answer not in the manual?
Visual guide illustrating weight limits for different installation modes and modes of use.
NHTSA recommendations for replacing car seats after moderate or severe collisions.
Transport Canada's requirements for replacing child restraints after a collision.
Explanation of different vehicle seat belt retractor types and their usage.
Instructions on how to unfold and prepare the car seat for use.
Guidance on correct positioning of harness straps for rear-facing and forward-facing.
Instructions for selecting the appropriate buckle slot based on child's position.
Steps for relocating harness straps to different slots on the seat.
Procedure for moving the buckle strap to a different slot for proper fit.
Detailed steps on how to properly tighten the harness for a secure fit.
Instructions for adjusting the headrest to the correct height for the child.
Instructions for attaching and securing the detachable rear-facing base.
Guidance on positioning the seat on vehicle seats with or without an elevated bight.
Instructions for installing the anti-rebound panel for rear-facing use.
Information on using infant head and body support cushions for a better fit.
Optional harness pads for newborns to provide extra padding.
Using the newborn protection insert with infant support for side protection.
Steps for installing the car seat using the LATCH/UAS system rear-facing.
Instructions for installing the car seat rear-facing using a lap/shoulder belt.
Instructions for installing the car seat rear-facing using only the lap belt.
Instructions and importance of using the top tether for forward-facing installations.
How to use and when to remove the Safe Stop feature for forward-facing.
Instructions for adjusting the car seat's bottom for forward-facing use.
Note that the ARP is for comfort only in forward-facing installations.
Guidance on ensuring no more than 20% of the base overhangs the vehicle seat.
Steps for installing the car seat using LATCH/UAS forward-facing.
Instructions for installing the car seat forward-facing using a lap/shoulder belt.
Instructions for installing the car seat forward-facing using only the lap belt.
Instructions for using the lap belt cushion in forward-facing installations.
How to attach and use the car seat's cup holder.
Instructions on adjusting the side wings for child comfort.
Guidance on installing the toddler liner for forward-facing use.
Instructions for washing and drying the car seat fabrics and pads.
Guidance on spot cleaning plastic components of the car seat.
Procedure for cleaning the car seat's center buckle mechanism.
General| Type | Convertible Car Seat |
|---|---|
| Brand | Diono |
| Model | Radian 3QXT+ |
| Rear-facing weight limit | 5 - 50 lbs |
| Booster weight limit | 50 - 120 lbs |
| Rear-facing height | Up to 44 inches |
| Forward-facing height | Up to 57 inches |
| Booster height | Up to 57 inches |
| Harness type | 5-point harness |
| Recline Positions | Multiple |
| Folding Feature | Yes |
| Forward-facing weight limit | 22 - 65 lbs |
| Safety features | Side impact protection |
| Installation | LATCH and seat belt |
| Harness Slots | 12 |
| Expiration | 10 years |
To Next Page