Nuna AACE Booster Car Seat

The Nuna AACE can be used in high-back mode when your child is at least 4 years old, weighs 40–110 pounds, and is 43–60 inches tall. But meeting the minimum requirements is only part of the equation. Your child must also be mature enough to sit upright with the vehicle's seat belt correctly positioned for the entire ride. Many children benefit from staying in a forward-facing harnessed car seat longer.

No. The Nuna AACE uses your vehicle's lap-and-shoulder belt to secure your child. Its rigid lower anchor connectors help keep the booster securely positioned as kids climb in and out and prevent it from becoming a loose object when unoccupied. The AACE can also be used without lower anchors when permitted by the vehicle and booster manuals.

Yes, the Nuna AACE can accommodate certain fixed or protruding vehicle headrests, making it a useful option for vehicles where other high-back boosters may not fit correctly. Compatibility depends on your vehicle's seating configuration. Always check both the Nuna AACE manual and your vehicle owner's manual, and make sure the shoulder belt retracts freely through the belt guide.

The Nuna AACE is relatively wide, particularly as its shoulder wings expand, so it may not be the best choice for three-across seating. Fit depends on your vehicle and the other car seats or boosters being used. For tighter back seats, a narrower booster may be a better option.

The Nuna AACE converts to a backless booster for children at least 5 years old, weighing 50–120 pounds and measuring 43–60 inches tall. Your child must also have adequate head support from the vehicle seat or headrest and a properly fitting lap-and-shoulder belt. There's no need to rush the transition if your child still benefits from the support of the high-back booster.

In high-back mode, the Nuna AACE accommodates children weighing 40–110 pounds and measuring 43–60 inches tall, beginning at age 4. In backless mode, the limits are 50–120 pounds and 43–60 inches, beginning at age 5. Children should continue using an appropriate booster until the vehicle's seat belt fits correctly without one.

For families looking for a booster that adjusts as their child grows, the Nuna AACE offers some meaningful advantages. Its 3D growth system expands the shoulder wings as the headrest rises, while three seat-depth settings provide additional leg support. Rigid lower anchors, breathable fabrics, and the ability to convert to a backless booster add to its long-term appeal. It's a relatively wide and heavy booster, though, so it may not be the best choice for frequent vehicle transfers or tight seating arrangements.

You can see the Nuna AACE at any Bambi Baby showroom. All of our locations display the full Nuna car seat lineup, so you can explore the features, compare models, and get guidance from our team before purchasing.

Yes! Bambi Baby offers hands-on car seat installation assistance, including help understanding booster positioning and proper seat belt fit. Our Miami and Paramus locations have on-site Certified Child Passenger Safety Technicians (CPSTs). For assistance at other showrooms, we recommend calling ahead to confirm staff availability.

You can still get personalized help through Bambi Baby's complimentary virtual shopping consultations. Our team can walk you through the Nuna AACE's features, help you compare booster seats, and answer your questions before purchasing. Request a virtual consultation here.

Bambi Baby is an authorized Nuna retailer with 50 years of experience helping families choose baby gear. Our team can help you compare booster seats, understand vehicle fit considerations, and find the right option for your child. We also offer hands-on car seat installation assistance and the full Nuna car seat lineup at our showrooms. Your purchase includes applicable manufacturer warranty coverage and access to our customer support team.