Protecting Oregon's Environment
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Oregon Department of Environmental Quality

Air Quality

Vehicle Inspection Program (VIP)

Portland Area:
Station locations and hours
Station Closures
Vehicles Required to Test


Medford Area:
Station locations and hours
Station Closures
Vehicles Required to Test


Inspection Boundary Lookup
Preparing to Test
Failed Vehicle
For Dealers, Fleets, Repair Shops
Purpose of Testing
Vehicle Testing Methods
Q&A on Volkswagen news

Preparing to test

Before the test

  • Please leave your pets at home
  • No smoking on State of Oregon property
  • Please turn off cell phone in the testing lane
  • Make sure your vehicle is in good working condition. Vehicles that pose a safety hazard will not be tested
  • Trailers, towed vehicles or other mobile equipment must be disconnected from the vehicle prior to testing
  • Excessively smoking vehicles will not be tested, for more information see our smoking vehicles fact sheet / Autos emitiendo humo en exceso.

Note for model year 1996 and newer vehicles: When the Check Engine light is illuminated on your dashboard, your car will not pass DEQ’s test and is in need of repair. Once your vehicle receives repair and the Check Engine light has turned off, be sure your mechanic explains the drive cycles your vehicle must experience prior to going through DEQ’s test. Otherwise, if you test too early after a repair, your test results will be “Unready”; meaning your vehicle’s computer hasn’t finished evaluating all of the emission control equipment.

About the test

The type of emissions test taken will depend on the year of your vehicle. Each of the tests takes about five minutes.

  • All 1975-1995 Vehicles are monitored for carbon monoxide and hydrocarbon emission.
  • 1996 and newer vehicles receive the On-Board Diagnostics test which queries the vehicle's on-board computer to ensure that pollution control equipment is working properly.
  • All vehicles are tested for smoke.

Renewing your registration

If your vehicle passes a DEQ emissions test you can renew your registration and receive your DMV tags at the DEQ inspection stations. DEQ cannot issue DMV renewal tags without administering a test.

Be sure to bring:

  • Your entire DMV registration renewal form with sections 1 (insurance information) and 2 (signature of owner) completed.
  • DEQ accepts Cash, PIN-less Debit/Credit card (VISA, MasterCard or Discover) or money order to pay for the emissions test AND your DMV registration fees.

After passing the test, you will receive the certificate needed to renew your registration. The certificates are valid for 180 days. Once it is used to register the vehicle, you do not need to test again for two years.

Did you lose the DMV information mailed to you? 

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For questions or feedback on the Vehicle Inspection Program, visit our Question and Comment page, or call one of our area contact numbers below:
Portland Area: 503-229-5066
Medford Area: 541-776-6145
Toll-Free in Oregon: 877-476-0583
Hearing Impaired: 711

Oregon Department of Environmental Quality
Headquarters: 811 SW Sixth Ave., Portland, OR 97204-1390
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

The Oregon Department of Environmental Quality is a regulatory agency authorized to protect Oregon's environment by
the State of Oregon and the Environmental Protection Agency.

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