1. Introduction
The Fisher-Price Maxguard i-Size Car Seat (BB725) is designed to provide advanced safety and comfort for your child during car journeys. Developed according to the rigorous i-Size (R129) European standard, this car seat uses your child's height as the primary criterion for a precise fit and maximum protection. It is suitable for children from 76 cm to 150 cm, covering approximately 15 months up to 12 years of age, making it a long-lasting investment.
This manual contains important information regarding the correct installation, use, and maintenance of your car seat. Please read it carefully before first use and keep it for future reference.

Figure 1: Front view of the Fisher-Price Maxguard i-Size Car Seat in black, featuring a 5-point harness and adjustable headrest.
2. Safety Features
The Maxguard i-Size Car Seat incorporates several features to ensure your child's safety:
- i-Size (R129) Standard: This advanced European standard ensures enhanced safety, using height as a reference for a perfect fit and optimal protection, reducing installation errors.
- Side Impact Protection: The car seat features a reinforced internal structure designed to absorb and dissipate collision energy, offering superior protection for the head, neck, and torso in the event of a side impact.
- ISOFIX + Top Tether System: Provides a firm, stable, and error-free installation, ensuring superior stability and safety.
- 5-Point Harness: A secure 5-point harness system keeps your child safely restrained. The harness automatically adjusts with the headrest.

Figure 2: The i-Size standard uses the child's height for a more secure and comfortable fit, adapting to each stage of growth.
3. Comfort & Adjustability
The Maxguard i-Size Car Seat is designed for maximum comfort throughout your child's growth:
- Premium Padding and Reducer Cushions: Soft, super-padded reducer cushions provide maximum comfort and support, ideal for both short and long journeys.
- 14-Position Headrest Adjustment: The headrest can be adjusted to 14 different positions, ensuring a perfect fit for every stage of your child's growth.
- Automatic 5-Point Harness Adjustment: The 5-point harness automatically adjusts with the headrest, simplifying use and ensuring a correct fit as your child grows.

Figure 3: The car seat offers 14 headrest adjustment options with automatic 5-point harness adjustment to adapt to the child's growth.

Figure 4: Premium padding and super-padded reducer cushions provide maximum comfort and support for the child.
4. Installation
Proper installation is crucial for your child's safety. The Maxguard i-Size Car Seat offers secure installation options:
4.1. ISOFIX + Top Tether Installation
- Locate the ISOFIX anchor points in your vehicle's back seat.
- Extend the ISOFIX connectors from the car seat base until they click securely into the vehicle's anchor points. Ensure the indicators turn green.
- Attach the Top Tether strap to the designated anchor point in your vehicle (usually behind the back seat or in the trunk area). Tighten the strap until it is taut.
- Push the car seat firmly against the vehicle's backrest to ensure a snug fit.

Figure 5: The ISOFIX system with Top Tether ensures a firm and secure attachment to the vehicle.

Figure 6: The ISOFIX connectors extend from the base of the car seat, ready to be attached to the vehicle's ISOFIX anchor points.
4.2. Securing Your Child
- Place your child in the car seat.
- Fasten the 5-point harness. Ensure the straps are not twisted and are snug against your child's body, with no more than two fingers fitting between the strap and your child's collarbone.
- The belt tongue holders on the sides of the seat facilitate placing and removing the child.

Figure 7: Safety belt tongue holders facilitate placing and removing the child from the seat.
4.3. Belt Storage System
The car seat features an easy storage system for the belts, eliminating the need to remove them when not in use, particularly when transitioning to booster mode for older children using the vehicle's seat belt.

Figure 8: The car seat features an easy storage system for the belts, eliminating the need to remove them when not in use.
5. Operating Instructions
5.1. Adjusting the Headrest and Harness
To adjust the headrest and harness height, locate the adjustment lever (usually at the top or back of the headrest). Squeeze the lever and simultaneously pull the headrest up or push it down to the desired position. The 5-point harness will automatically adjust with the headrest.
5.2. Reclining Positions (if applicable)
Refer to the labels on the car seat for specific instructions on adjusting recline positions. Ensure the car seat is in an appropriate recline for your child's age and the vehicle's seat angle.
6. Maintenance
6.1. Cleaning the Cover
The Maxguard i-Size Car Seat features a fully washable cover for easy maintenance and hygiene. To remove the cover, carefully detach it from the car seat frame following the instructions on the fabric labels. Wash the cover according to the care instructions (typically machine wash cold on a delicate cycle, air dry). Do not use bleach or harsh detergents.

Figure 9: The car seat is fully covered by a washable cover for easy cleaning and hygiene.
6.2. Cleaning the Harness and Frame
Wipe the harness straps with a damp cloth and mild soap. Do not machine wash the harness straps as this can weaken them. Clean the plastic and metal parts of the car seat frame with a damp cloth and mild soap. Allow all parts to air dry completely before reassembling.
7. Troubleshooting
- Harness too tight/loose: Ensure the harness is adjusted correctly for your child's size. The headrest adjustment automatically adjusts the harness height. Use the central adjuster strap to tighten or loosen the harness.
- Car seat feels loose after installation: Recheck the ISOFIX connectors and Top Tether strap. Ensure they are securely latched and tightened. Push the car seat firmly into the vehicle seat.
- Difficulty fastening/unfastening harness: Check for any obstructions in the buckle. Ensure the buckle tongues are inserted correctly.
- Cover difficult to remove/reattach: Refer to the specific instructions in the full product manual for detailed steps on cover removal and reattachment.
If you encounter any issues not covered here, please contact Fisher-Price customer support.
8. Specifications

Figure 10: A detailed front view of the car seat, highlighting the harness system and headrest.
| Feature | Detail |
|---|---|
| Model | BB725 |
| Certification | Inmetro: 000566/2025 |
| Material Type | Metal, Plastic, Polyester |
| Composition | Fabric |
| Orientation | Forward-facing |
| Harness Type | 5-point |
| Child Height Range | 76 to 150 cm |
| Recommended Age | Approx. 15 months to 12 years |
| Color | Black |
| Product Dimensions (L x W x H) | 41.5 x 57 x 45 cm |
| Product Weight | 8.5 kg |
| Installation Type | ISOFIX + Top Tether (primary), Vehicle Seat Belt (for booster mode) |
9. Warranty and Support
The Fisher-Price Maxguard i-Size Car Seat comes with a 12-month warranty against manufacturing defects. Please retain your proof of purchase for warranty claims.
For technical support, spare parts, or any questions regarding the use and maintenance of your car seat, please contact Fisher-Price customer service. Contact information can typically be found on the product packaging or the official Fisher-Price website.
10. Product Overview Video
Watch this official product video for a visual guide to the features and benefits of the Fisher-Price Maxguard i-Size Car Seat.
Video 1: Official product overview of the Fisher-Price Maxguard i-Size Car Seat, demonstrating its key features and ease of use. (Note: The video source URL is a placeholder as a specific m3u8 URL was not provided in the input data.)