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Car Seat Misuse Widespread, Experts Detail Correct Installation Methods

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Alarming Car Seat Misuse: 74% of Inspections Reveal Improper Installation in 2025

A significant majority of car seats inspected in 2025 were found to be improperly installed or used, according to data from the National Digital Car Seat Check Form (NDCF). Child passenger safety technicians (CPSTs) reported that 74% of nearly 60,000 car seats checked did not comply with manufacturer specifications.

The primary issues identified involved seat belts, harnesses, and tethers. Experts emphasize that correct car seat usage is crucial, as traffic accidents remain a leading cause of death among children in the United States, and proper installation significantly reduces injury risk.

Prevalence of Car Seat Misuse

The 2025 NDCF data indicates a high rate of car seat misuse. Emily Thomas, associate director for auto safety at Consumer Reports and a CPST, alongside CPST Elizabeth Kanagawa, highlighted the common errors and their corresponding solutions to enhance child safety. Research from the National Highway Traffic Safety Administration supports the effectiveness of correctly used car and booster seats in injury prevention.

Common Car Seat Installation Errors

Three main categories of misuse were identified: seat belt issues, harness issues, and tether misuse.

1. Seat Belt Issues

Seat belt misuse accounted for nearly 60% of cases, primarily due to the car seat base not being adequately secured to the vehicle.

  • Tighten and Lock the Seat Belt: To properly secure the car seat, the seat belt must be locked and tight. Pull the seat belt entirely out of its retractor until an audible click indicates it has engaged the locking mode. Then, slowly retract the belt while applying firm downward pressure to the car seat base. The car seat should not move more than one inch side-to-side or front-to-back at the belt path.
  • Use the Designated Belt Path: Convertible and all-in-one car seats typically feature distinct belt paths for rear-facing and forward-facing orientations. Users should consult the car seat manual and labels to ensure the seat belt is routed through the correct path for the specific installation direction, ensuring it lies close to the vehicle seat.

2. Harness Issues

Harness misuse was also identified in nearly 60% of car seats checked by CPSTs, making it the second most common problem.

  • Adjust Strap Height: The harness strap height depends on the car seat's orientation. For rear-facing seats, the straps should be positioned at or slightly below the child's shoulder. For forward-facing seats, they should be at or slightly above the child's shoulder. This adjustment is important for controlling child movement during a crash.
  • Perform the Pinch Test: To verify harness tightness, attempt to pinch the harness webbing at the child's shoulder. If properly tightened, no webbing should be able to be pinched between the thumb and forefinger.
  • Position Chest Clip and Crotch Buckle: The chest clip, which connects the shoulder straps, should be at armpit level to maintain correct strap positioning. The crotch buckle should be positioned at the front of the child's lap, utilizing the appropriate slot if multiple options are available.

3. Tether Misuse

Tethers represented the third most common car seat misuse. Tethers are straps designed for forward-facing car seats, serving as an additional anchor point to prevent forward tipping in the event of a crash.

  • Always Use the Tether: The tether is not optional for forward-facing car seats. It must be securely attached to the vehicle's designated anchor point. These anchor points can be located on the rear shelf, seat back, ceiling, or floor, depending on the specific vehicle model.

General Recommendations

Child passenger safety experts recommend keeping a child in a rear-facing car seat for as long as possible, up to the manufacturer's specified height or weight limits. This position offers enhanced protection during a vehicle collision.

Individuals uncertain about correct car seat installation are advised to consult their car seat manual or seek assistance from a local child passenger safety technician.