1. Product Overview
The CYBEX Gold Sirona Gi i-Size Plus Car Seat with integrated base is a functional and secure car seat designed for children approximately from 3 months up to 4 years old (or from birth with a newborn reducer, sold separately). It supports children weighing up to 20 kg and with a height range of 61 - 105 cm (from 40 cm with the newborn reducer).
This car seat prioritizes maximum safety with its rear-facing travel capability, integrated Linear Side-impact Protection (L.S.P. System), and a load leg for additional stability. It complies with the UN R129/03 safety standard.

Figure 1.1: Front-side view of the CYBEX Gold Sirona Gi i-Size Plus Car Seat with its integrated base.
2. Safety Information
WARNING: Never leave your child unattended in the car seat. This product is not suitable for jogging or rollerblading.
- Always ensure the car seat is correctly installed and secured before placing your child in it.
- The car seat offers maximum safety when used in the rear-facing position.
- The integrated Linear Side-impact Protection (L.S.P. System) should always be extended on the side closest to the car door.
- Ensure the load leg is correctly extended and firmly positioned against the vehicle floor for optimal stability.
- Regularly check the harness system for proper adjustment and ensure it is snug against your child's body without being too tight.
- Do not use the car seat if it has been involved in an accident, even if there is no visible damage. Internal damage may compromise its safety.

Figure 2.1: Detail of the L.S.P. System, designed to absorb impact forces from side collisions.
3. Setup and Installation
The Sirona Gi i-Size Plus car seat features an integrated base for easy and secure installation using the ISOFIX system.
3.1 ISOFIX Installation
- Locate the ISOFIX anchor points in your vehicle.
- Extend the ISOFIX connectors from the car seat base by pressing the release buttons.
- Push the ISOFIX connectors firmly into the vehicle's anchor points until you hear an audible 'click' and the indicators turn green.
- Push the car seat firmly against the vehicle seat back to ensure a tight fit.
- Extend the load leg until it firmly touches the vehicle floor. Ensure the indicator on the load leg turns green.

Figure 3.1: Side view of the car seat base, showing the ISOFIX connectors and load leg.
3.2 Harness Preparation
Before placing your child, use the integrated harness attachments to hold the harness straps out of the way. This simplifies placing and removing your child from the seat.
4. Operating Instructions
4.1 360° Rotation Mechanism
The car seat features a 360° rotation mechanism, allowing for easy installation and removal of your child, as well as switching between rear-facing and forward-facing positions (once the child meets the height/age requirements for forward-facing).

Figure 4.1: Illustration of the 360° rotation feature for easy access and direction change.
4.2 Headrest and Harness Adjustment
The headrest is adjustable to 12 different height positions. As you adjust the headrest, the harness system automatically adjusts to ensure a proper fit for your growing child.

Figure 4.2: Adjusting the headrest height to accommodate your child's growth.
4.3 Recline Positions
The car seat offers multiple recline positions (3 positions) for optimal comfort, especially during long journeys or when your child is sleeping. These positions can be adjusted with one hand.

Figure 4.3: The car seat offers multiple recline positions for enhanced comfort.
5. Maintenance
5.1 Cleaning the Covers
The fabric covers of the Sirona Gi i-Size Plus car seat are removable and washable. It is recommended to wash the covers at 30°C. Please refer to the care label on the covers for specific instructions.
5.2 Air Circulation
The car seat is designed with 360° air circulation, featuring mesh fabric inserts and ventilation holes to ensure optimal airflow and comfort for your child.

Figure 5.1: Airflow paths through the car seat's ventilation system.
6. Troubleshooting
If you encounter any issues with your CYBEX Gold Sirona Gi i-Size Plus Car Seat, please refer to the following common troubleshooting tips:
- Installation Indicators Not Green: Ensure ISOFIX connectors are fully engaged and the load leg is firmly extended and locked. Re-adjust if necessary.
- Difficulty Rotating Seat: Ensure the seat is in an upright position and not reclined. Check for any obstructions around the base.
- Harness Too Tight/Loose: Adjust the harness length using the central adjuster strap. Ensure the headrest is at the correct height for your child, as this also adjusts the harness.
- Unusual Noises: Check all connections and ensure the seat is securely installed. If noises persist, discontinue use and contact customer support.
For persistent issues or concerns not addressed here, please contact CYBEX customer support or your retailer for assistance.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | 522001669 |
| Recommended Age | Approx. 3 months to 4 years (from birth with newborn reducer) |
| Maximum Child Weight | 18 kg (rear-facing), 18 kg (forward-facing) |
| Recommended Child Height | 40 cm (with reducer) - 105 cm |
| Dimensions (L x W x H) | 71 x 44 x 75 cm |
| Product Weight | 12.7 kg |
| Materials | Polyester blend, Metal, Plastic, Textiles |
| Harness Type | 5-point harness |
| Installation Type | ISOFIX (integrated base) |
| Recline Positions | 3 |
| Headrest Positions | 12 adjustable positions |
| Special Features | 360° Rotation, Integrated L.S.P. System, Air Ventilation |
| Care Instructions | Wash covers at 30°C |
8. Warranty and Support
For information regarding the product warranty, please refer to the warranty card included with your purchase or visit the official Cybex website. Warranty terms and conditions may vary by region.
If you require technical support, have questions about installation, or need assistance with any aspect of your CYBEX Gold Sirona Gi i-Size Plus Car Seat, please contact Cybex customer service directly. Contact details can typically be found on the Cybex website or in your product packaging.
You can also visit the official Cybex store on Amazon for additional product information and accessories: Cybex Amazon Store





