Aftermarket Alternative Fuel Vehicle (AFV) Conversions

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Email the Technical Response Service or call 800-254-6735.

Conventional original equipment manufacturer vehicles altered to operate on propane, natural gas, methane gas, ethanol, or electricity are classified as aftermarket AFV conversions. All vehicle conversions, except those that are completed for a vehicle to run on electricity, must meet current applicable U.S. Environmental Protection Agency (EPA) standards. For more information about vehicle conversion certification requirements, see the Alternative Fuels Data Center's Vehicle Conversions website and EPA's Certification and Compliance for Vehicles and Engines website. (Reference 40 CFR 85)

Point of Contact
Regulatory Compliance
U.S. Environmental Protection Agency
Phone: (734) 214-4343