Laws and rules: Vehicle manufacturers

Read about current laws and proposed rules for licensed vehicle manufacturers.

Clean car emission requirements

Required emission standards

Starting with 2009 models, new and used passenger cars, light-duty trucks, and medium-duty passenger vehicles must meet California emission standards. Vehicles must be certified to at least one of the following emission standards to be registered, leased, rented, licensed, or sold for use in Washington:

Vehicles that are "federally certified" or "certified to meet EPA standards" aren't certified to California emission standards and don't meet Washington requirements.

Required reports

Washington law requires automakers to submit 2 Non-methane Organic Gas (NMOG) Fleet Average Compliance Reports to the Department of Ecology by March 1 each year.

Automakers that aren't in compliance with the fleet average requirement must also submit a Fleet Average Enforcement Report.

Warranties for zero-emission vehicles

Washington doesn't require automakers to offer additional extended warranties for sales of zero-emission vehicles like California. However, the Department of Ecology encourages automakers to offer and honor those extended warranties voluntarily as a service to their customers.

Proposed rules

View current or proposed rule changes that may affect you.

Title 308 WAC: Department of Licensing

Public hearing or comments

Public hearing held January 7, 2020

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View current laws and rules

Explanation of abbreviations

  • RCW—Revised Code of Washington (Washington State laws)
  • WAC—Washington Administrative Code (Washington State agency regulations)

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