EV Battery Safety Rules Pushed Back to March 2025
Published Date: 2/14/2025
Rule
Summary
The government is pushing back the start date for new safety rules on electric vehicles to March 20, 2025. These rules, called FMVSS No. 305a, cover battery safety and require car makers to provide clear emergency info for first responders. This delay gives manufacturers more time to get everything ready without rushing or extra costs.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Compliance Start Date Delayed
The agency pushed back the effective date of the December 20, 2024 final rule adopting FMVSS No. 305a to March 20, 2025. The delay is intended to give manufacturers more time to prepare so they do not have to rush or incur extra costs.
New Battery Performance Requirements
FMVSS No. 305a, which replaces FMVSS No. 305, includes performance requirements for the propulsion battery and applies to both light and heavy vehicles. These requirements are part of the safety standard adopted in the December 20, 2024 final rule and remain in effect when the standard takes effect on March 20, 2025.
Emergency Response Documentation Required
The final rule established a new part requiring manufacturers to compile risk mitigation documentation and submit standardized emergency response information to assist first and second responders handling electric vehicles. That requirement is part of the rule whose effective date was delayed until March 20, 2025.
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Key Dates
Department and Agencies
Related Federal Register Documents
2026-11072, Federal Motor Vehicle Safety Standard No. 214; Side Impact Protection; Federal Motor Vehicle Safety Standard No. 305a; Electric-Powered Vehicles: Electric Powertrain Integrity; Federal Motor Vehicle Safety Standard No. 307; Fuel System Integrity of Hydrogen Vehicles
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2026-16749, Denial of Motor Vehicle Defect Petition, DP26002
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