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  1. Home
  2. Vehicle and Engine Certification

Certification and Compliance for Onroad Vehicles and Engines

There are three types of onroad vehicles and engines:

Passenger Cars and Trucks (Light-Duty)

  • Certification and fuel economy for passenger cars and trucks
  • Compliance reporting for passenger cars and trucks
  • Vehicle and engine alternative fuel conversions
  • Compliance information for light-duty Greenhouse Gas (GHG) Standards
  • Evaluation program for aftermarket retrofit devices
  • EPA’s emissions test program for privately-owned vehicles (EPA In-Use Surveillance Verification Program)
  • Compliance Credits Retired

Commercial Trucks and Buses (Heavy-Duty)

  • Certification for commercial trucks and buses
  • Compliance reporting for commercial trucks and buses
  • Vehicle and engine alternative fuel conversions

Motorcycles (Light-Duty)

Non-electric:
  • Certification for non-electric motorcycles
  • Compliance reporting for non-electric motorcycles
  • Confirmatory testing
Electric:
  • Certification for electric motorcycles
  • Compliance reporting for electric motorcycles

Vehicle and Engine Certification

  • Onroad
  • Nonroad
  • EV-CIS
Contact Us about Vehicle and Engine Certification
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 7, 2025
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