Do you have a question about the Diono Radian 3QXT and is the answer not in the manual?
Ensuring tight installation, proper harness fit, and understanding usage restrictions.
Essential warnings, prohibitions on modifications, and safe practices.
How to route belts and position harness for rear-facing installation.
Step-by-step instructions for installing the car seat using LATCH/UAS.
Steps for installing the car seat using vehicle seat belts.
Introduction and belt path choices for forward-facing installation.
Steps for installing the car seat using LATCH/UAS.
Steps for installing using vehicle seat belts.
Key rules, restrictions, and belt positioning for booster mode.
| Category | Car Seat |
|---|---|
| Brand | Diono |
| Model | Radian 3QXT |
| Weight Limit | 5 - 120 lbs |
| Height Limit | Up to 57 inches |
| Installation Type | Latch or Seatbelt |
| Orientation | Rear-Facing, Forward-Facing, Booster |
| Rear-facing weight limit | 5-50 lbs |
| Forward-facing weight limit | 22-65 lbs |
| Booster weight limit | 40-120 lbs |
| Rear-facing height limit | Up to 44 inches |
| Harness Slots | 12 positions |
| Expiration | 10 years from date of manufacture |
| Safety Features | Side Impact Protection, Steel Frame |
| Fabric | Machine Washable |
| Folding | Yes, for travel and storage |
| Material | Steel |











