Child Car Seat Errors: Over Half Installed Incorrectly, NHTSA Warns

April 10, 2025 – The National Highway Traffic Safety Administration (NHTSA) released new findings today showing that more than half of child car seats inspected during a recent nationwide safety campaign were installed incorrectly. The alarming data reinforces a persistent problem: even as car seat technology improves, human error remains the leading cause of improper restraint use.

During the campaign, inspectors checked over 2,000 child restraints at free checkpoints across 30 states. The results: only 47% met federal safety standards, while 53% had at least one critical error that could leave a child vulnerable in a crash. The most common mistakes included loose harness straps, a seat that moved more than an inch at the belt path, and the wrong tether route for forward-facing seats.

“We see the same patterns year after year,” said Dr. Karen Aldrich, a pediatrician and child passenger safety technician with the American Academy of Pediatrics. “Parents often tighten the harness at the chest clip but forget to remove the thick winter coat, which creates dangerous slack. Others assume the seat is locked in place because the base clicks, but they don’t actually pull the belt tight.”

The NHTSA report echoes similar findings from the Road Safety Authority of Ireland, which earlier this month reported a 53% non-compliance rate. However, the U.S. data adds a new layer: geographic disparity. States with mandatory car seat inspection laws—such as California and New York—showed compliance rates roughly 10% higher than those without. “Legislation alone isn’t enough, but it does drive awareness and action,” noted Dr. Aldrich.

Exclusive insight: A new NHTSA recall alert
Compounding the issue, NHTSA today also issued a voluntary recall affecting 18,000 units of the “ComfortRide” convertible car seat model (manufactured between January 2023 and March 2024) due to a buckle that can release unintentionally under high heat. While unrelated to installation errors, the recall highlights the importance of registering car seats to receive safety updates. Parents can check their seat’s model number at NHTSA.gov/recalls.

Common installation pitfalls (and how to fix them):

1. Loose harness straps – The strap should pass the “pinch test”: if you can pinch any webbing at the shoulder, it’s too loose.
2. Seat movement – After installation, the seat should not shift more than one inch forward or side-to-side at the belt path.
3. Wrong recline angle – Infants under 12 months must ride semi-reclined (45 degrees); older children can use a more upright position.
4. Using the wrong belt path – Many convertible seats have two paths: one for forward-facing, one for rear-facing.
5. Forgetting the top tether – Forward-facing seats must have the top tether anchored to the vehicle’s