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Car seat safety: Avoid 9 common mistakes

3. Installing the car seat or buckling up your child the wrong way

Before you install a car seat, read the seat maker's instructions. Also read the section on car seats in the owner's manual for your vehicle. Many car seat makers provide online videos with steps for installation. Watching the video directly from the car seat maker should give you the most accurate advice. To check that it is installed securely, grab the bottom of the seat near the attachment points or seat belt path. If you can move the seat more than 1 inch (2.5 centimeters) from side to side or front to back, it's not secured tightly enough.

If you use a seat that's only for infants or a convertible seat that faces the back of the car, keep these tips in mind:

  • Use the harness slots described in the seat maker's instructions. The slots are usually located at or just below the child's shoulders. Place the harness straps over your child's shoulders.
  • Buckle the harness straps and chest clip. Make sure it's a snug fit. The harness straps should be tight enough that you can't pinch any strap between your fingertips. The chest clip should be even with your child's armpits. Make sure the straps and clip lie flat against your child's chest and over the hips with no slack.