Federal Car Seat Tests Change for Side and Frontal Crashes on Dec. 5
New manufacturing requirements take effect next month, introducing stricter side-impact simulations and updated frontal crash benchmarks for child restraints.
By Abigail Brooks ·
The federal government is shifting how it evaluates child car seat safety, with new rules taking effect for seats manufactured on or after December 5, 2026. These changes introduce stricter benchmarks for both side-impact and frontal crash scenarios, aiming to reduce injuries in common collision types.
The primary addition is a side-impact performance standard known as FMVSS 213a. This rule requires covered car seats to withstand a simulated T-bone crash. The test setup includes a simulated vehicle seat and door to measure restraint performance. The standard generally applies to portable restraints recommended for children under 40 pounds or under 43 inches in height. Exceptions include car beds, harness-only restraints, and specific school bus seats. Although the National Highway Traffic Safety Administration issued this rule in 2022, the December 2026 date marks when compliance becomes mandatory.
A separate update, FMVSS 213b, modifies how frontal crashes are tested. The new procedure uses a test seat designed to mimic modern vehicle back seats. It also replaces the older lap belt simulation with a simulated lap-and-shoulder belt for most restraints. These adjustments reflect how children are actually restrained in current automobiles.
Parents do not need to replace existing seats solely because of this deadline. A seat bought after December 5 might have been manufactured before that date, so the production date on the label determines which standard applies. Some manufacturers have already adopted the new rules early. Owners should verify that their current seat fits the child and the vehicle, follows installation instructions, and has not been recalled.
The new rules also update labeling requirements for forward-facing seats and boosters. Manufacturers must now specify a minimum forward-facing weight of at least 26.5 pounds. For booster seats, the minimum weight must be at least 40 pounds. These numbers are labeling standards, not commands to switch a child’s seat immediately upon reaching that weight.
The National Highway Traffic Safety Administration advises keeping children in each stage of restraint as long as they fit within the manufacturer’s stated limits. The focus remains on proper fit and usage rather than a single weight threshold.
The updated standards apply to all child restraints manufactured on or after December 5, 2026. Existing inventory manufactured before that date will continue to meet the previous federal requirements.
