Subaru Emissions Testing in Boise,ID 
Emissions Testing Information for the State of Idaho
Emissions Tips and Frequently Asked Questions

Emissions testing was established in Ada County in 1984 as part of the Federal Clean Air Act, and much later in Canyon County, in 2010. They are slightly different programs, but these are the only 2 counties in Idaho requiring you to have your emissions tested every 2 years.

This program is required and monitored by the state, and the test must be performed at an Idaho State Certified testing center. These are usually the red vans you see parked in various corner locations.

We don't perform the emissions test, but have collected some information so you can easily find answers to your questions about emissions testing in Boise. We can help with getting emissions issues corrected or repairs made if you fail a test, as long as you have a check engine light displaying in your dash.

Find some tips and FAQ's below, and feel free to call us with any questions.

Larry H. Miller Subaru Boise

11196 West Fairview Ave.
Directions Boise, ID 83713

  • Sales: 888-628-3910
  • Service: 888-329-0486
  • Parts: 888-306-0907
 Emissions Testing FAQ's

Q: What vehicles need to be tested?
A: All 1981 and newer vehicles registered or required to be registered in Ada County must be emissions tested unless they are exempt. Exempted vehicles include electric vehicles, hybrid vehicles, motorhomes and vehicles with a gross vehicle weight under 1500 pounds. Heavyweight vehicles are required to be tested.

Q: How often will my vehicle need to be tested?
A: The test is required every two years, even or odd years coinciding with the model year of your vehicle.

Q: How do I know if my vehicle is due for an emissions test?
A: You will receive a notice in the mail, as long as the DMV has your current address on file.

Q: What do I do if my vehicle fails an emissions test?
A: You will need to make an earnest effort to repair the reason your vehicle is failing. If your vehicle is a 1996 or newer it will set a code, and you will then need to address the code that caused your test to fail.

Q: What should I do if I have a check engine light on?
A: If you are due for your emissions test, have it tested anyway. The test will help identify what may be causing your check engine light to display, and you can use this information to help troubleshoot any necessary repairs. Doing this will ensure that your repairs may count towards a waiver if that becomes necessary. If you do have a check engine light displaying, we can help with your needed repairs. Just bring your car to Larry H. Miller Subaru and we can address the issues you may be having.

 Emissions and Clean Air Tips

  • Keep your vehicle well maintained.
  • Don't let your engine idle for more than 30 seconds.
  • Make sure your battery is in good condition.
  • Use high quality fuel.
  • Drive around for 20-30 minutes before you have your vehicle tested.


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