1. Important Safety Information
Please read this entire manual carefully before installing or using your Cosco Progress Car Seat. Failure to follow these instructions can result in serious injury or death to your child.
- Always secure your child in the car seat, even for short trips.
- Never leave your child unattended in the car seat.
- Ensure the car seat is correctly installed according to the instructions for your child's weight and height.
- Do not use this car seat if it has been involved in a crash, even if there is no visible damage.
- Refer to your vehicle's owner's manual for specific car seat installation instructions and locations.
This car seat is designed for children from birth up to 36 kg (approximately 10 years), adapting through various stages of growth.

Image 1.1: The Cosco Progress Car Seat in Gray, designed for various stages of child growth.
2. Product Overview and Features
The Cosco Progress Car Seat KX-27 offers comfort and safety for your child from infancy through childhood. Key features include:
- Multi-Stage Use: Accommodates children from birth up to 36 kg (approximately 10 years).
- Adjustable Recline: Features 3 recline positions for optimal comfort at every stage.
- 5-Point Harness: A secure and easily adjustable 5-point safety harness.
- Adjustable Headrest: Headrest adjustable to 9 different heights to grow with your child.
- Comfortable Fabrics: Soft, removable, and washable fabrics for easy maintenance.
- Intuitive Installation: Designed for easy and intuitive installation with marked guides.

Image 2.1: A child comfortably seated in the Cosco Progress Car Seat, illustrating its multi-stage design for children up to 36 kg.

Image 2.2: Diagram showing the three adjustable recline positions of the car seat, enhancing comfort for the child.

Image 2.3: A parent adjusting the headrest, demonstrating its 9-height adjustability for growing children.

Image 2.4: Close-up view of the 5-point safety harness, highlighting its secure and easy-to-adjust design.

Image 2.5: A parent indicating the marked guides for easy and intuitive car seat installation.

Image 2.6: Detail of the car seat's soft, removable, and washable fabrics, emphasizing ease of cleaning.
3. Setup and Installation
Proper installation is crucial for your child's safety. Always follow these steps carefully.
3.1 Rear-Facing Installation (Birth to 13 kg)
- Place the car seat in the rear-facing position on the vehicle seat.
- Select the appropriate recline position for rear-facing use (refer to Image 2.2).
- Route the vehicle's lap and shoulder belt through the designated rear-facing belt path.
- Buckle the vehicle seat belt and pull firmly to remove all slack. The car seat should not move more than 1 inch (2.5 cm) side-to-side or front-to-back at the belt path.
- Ensure the infant insert is correctly positioned for newborns.
- Adjust the harness straps to be at or below your child's shoulders.

Image 3.1: A parent securing an infant in the car seat, demonstrating correct rear-facing installation for children up to 13 kg.
3.2 Forward-Facing Installation (Over 13 kg to 36 kg)
- Place the car seat in the forward-facing position on the vehicle seat.
- Select the appropriate recline position for forward-facing use (refer to Image 2.2).
- Route the vehicle's lap and shoulder belt through the designated forward-facing belt path.
- Buckle the vehicle seat belt and pull firmly to remove all slack. The car seat should not move more than 1 inch (2.5 cm) side-to-side or front-to-back at the belt path.
- Attach the top tether strap to the vehicle's tether anchor point and tighten.
- Adjust the harness straps to be at or above your child's shoulders.
- Adjust the headrest to the correct height so that the harness straps are properly aligned (refer to Image 2.3).

Image 3.2: A parent adjusting the headrest for an older child in the forward-facing car seat, ensuring proper fit.
4. Operating the Car Seat
Once installed, proper use of the car seat's features ensures your child's safety and comfort.
4.1 Securing Your Child
- Place your child in the car seat.
- Bring the harness straps over your child's shoulders and between their legs.
- Connect the two buckle tongues into the buckle receiver until you hear a click.
- Pull the harness adjustment strap to tighten the harness until it is snug against your child's body. You should not be able to pinch any excess webbing at the child's shoulder.
- Ensure the chest clip is positioned at armpit level.

Image 4.1: Close-up of the 5-point harness buckle, showing how to secure the child.
4.2 Adjusting Recline and Headrest
- Recline: To adjust the recline, locate the recline lever (usually at the front or side of the base). Squeeze the lever and adjust the seat to one of the 3 positions. Ensure the seat clicks into place. This adjustment should be done before installing the seat in the vehicle.
- Headrest: To adjust the headrest, locate the headrest adjustment handle (usually at the top of the headrest). Squeeze the handle and slide the headrest up or down to the desired height. Release the handle to lock it in place.
5. Maintenance and Care
Regular maintenance helps prolong the life of your car seat and ensures hygiene.
5.1 Cleaning the Fabrics
The car seat features soft, removable, and washable fabrics.
- Carefully remove the fabric covers from the car seat frame.
- Machine wash the covers in cold water on a delicate cycle with mild detergent. Do not use bleach.
- Tumble dry on low heat or hang to dry. Do not iron.
- Reattach the covers to the car seat frame, ensuring all straps and openings are correctly aligned.

Image 5.1: Detail of the car seat's soft, removable, and washable fabrics.
5.2 Cleaning the Harness and Buckle
- Wipe the harness straps with a damp cloth and mild soap. Do not machine wash or submerge harness straps in water, as this can weaken the webbing.
- Clean the buckle by rinsing it under warm water. Do not use soap or detergents on the buckle mechanism. Allow it to air dry completely.
5.3 General Inspection
- Periodically check all parts of the car seat for wear or damage.
- Ensure all buckles and adjusters are functioning correctly.
- Inspect the car seat for any cracks or broken components. If any damage is found, discontinue use and contact customer support.
6. Troubleshooting
If you encounter any issues with your Cosco Progress Car Seat, refer to the following common problems and solutions.
- Problem: Car seat moves too much after installation.
Solution: Ensure the vehicle seat belt is routed correctly through the designated belt path. Pull the seat belt firmly to remove all slack. The car seat should not move more than 1 inch (2.5 cm) at the belt path. - Problem: Harness straps are difficult to tighten or loosen.
Solution: Check for any twists in the harness webbing. Ensure the harness adjustment strap is pulled straight out from the car seat. If the problem persists, inspect the harness mechanism for obstructions. - Problem: Buckle is difficult to latch or unlatch.
Solution: Ensure there are no crumbs or debris inside the buckle mechanism. Rinse the buckle under warm water and allow it to air dry. Do not use lubricants. - Problem: Headrest adjustment is stiff.
Solution: Ensure the adjustment handle is fully squeezed. Check for any obstructions behind the headrest.
If these solutions do not resolve the issue, please contact Cosco customer support.
7. Specifications
Detailed specifications for the Cosco Progress Car Seat KX-27.
| Feature | Specification |
|---|---|
| Model Number | KX-27 |
| Maximum Weight Recommendation | 36 Kilograms |
| Product Dimensions (L x W x H) | 46 x 44 x 66 cm |
| Product Weight | 7.2 kg |
| Installation Type | Vehicle Seat Belt |
| Color | Gray |
| Recline Positions | 3 |
| Headrest Adjustments | 9 Heights |

Image 7.1: Diagram illustrating the dimensions of the Cosco Progress Car Seat.
8. Warranty and Support
Cosco products are manufactured with quality and safety in mind. For warranty information, product registration, or customer support, please refer to the contact details provided with your purchase or visit the official Cosco website.
You can also visit the Cosco Brand Store on Amazon for more information and product offerings.





