Choose the right seat for your child's age and size. There are different types of safety seats for infants, toddlers, and older children, so be sure to select one that is appropriate for your child's age and weight. Read the instructions. Each child safety seat comes with detailed instructions for installation, so be sure to read and follow them carefully.
Choose the right location for the seat. The safest place for a child safety seat is in the back seat, away from active airbags.
Secure the seat to the car. Most child safety seats are secured using the car's seat belt or LATCH system (Lower Anchors and Tethers for Children). Follow the instructions for your specific seat to properly secure it to the car. Tighten the seat belt or LATCH system. Make sure the seat is tightened securely to the car to ensure it doesn't move around while driving.
Adjust the harness straps. The harness straps should be snug against your child's body and at or below their shoulders. Test the seat. Once the seat is installed, test it to make sure it is secure by trying to move it side to side and front to back. It should not move more than an inch in any direction.