As of August 10, 2022, Automotive Dealer's Emissions Liability Extended
From 3 to 5 Business Days

With the passage of the Deter Tampering Motor Vehicle Emissions Control Systems Act (SB22-179), the period during which an auto dealer is liable for a recently purchased gas-powered motor vehicle's compliance with Colorado emissions standards has been extended from three to five business days after purchase. 

Beginning August 10, 2022, vehicle buyers must be informed of the extension when the emissions testing coupon is given to the customer to sign. New, updated vehicle emissions testing coupons will be available at the main Air Care Colorado office by August 31, 2022. Air Care Colorado will continue to honor the existing emissions testing coupons during the inventory transition. 

Please contact the Division of Motor Vehicles Emissions Team at 303.205.5603 if you have any questions.  


Our staff is doing the best they can to get everyone through the testing process as
quickly, cooly, and safely as possible.
Air Care, like many businesses, is a few staff members short right now, and
while we are working diligently every day to add team members, it does take time to train new staff.

Please keep this in mind when:

  • The line is a little longer than usual

  • the testing process takes a little longer,

  • not all lanes are open due to staff shortages or equipment malfunction,

  • and it's BLAZING HOT.

When speaking to staff, please try to remember that these people
are are working as hard and as fast as they are able.

Thank you for your understanding. 

Masks are no longer required at Air Care Colorado testing stations for customers or staff
If you would like for your inspector to wear a mask, please request this when you are greeted.
Our staff can make this accommodation elderly when requested.

NOTE: Emissions standards are tightening as of January 2022


Vehicle emissions continue to be a major contributor to air pollution in Colorado. 

Air Care Colorado is using tighter emissions standards for its I/M 240 dynamometer (treadmill) test, starting in January 2022. 

The I/M 240 test is for vehicles that are at least eight (8) years old back to model year 1982. 

Your vehicle should still pass this test (even with these new tighter standards) if it is in proper working order. 

Attempt to complete your vehicle registration renewal ONLINE
BEFORE visiting an Air Care Station

Due to COVID-19 adjustments to testing protocols, and delays in the postal system, it is possible that you may not need to go to an emissions inspection station; you may have already passed emissions through the RapidScreen roadside option, or you may not have received your registration renewal card in a timely manner. More vehicles are receiving passing emissions through the RapidScreen roadside testing option, and some registration notifications may not reflect this.

To renew online:
1) Be sure to have available:

  • License plate number,
  • Vehicle Identification Number (VIN), (You can find the 17-digit VIN on your insurance card, driver's side door of the vehicle, or the title.)
  • Current Colorado insurance information, and
  • Valid credit card or check.

2) Got to
3) Click on  Renew a vehicle registration (The car icon under 'Vehicle Quick Start.')
4) Read instructions and press the 'NEXT' button to begin the registration process.

If you receive a message that says your vehicle requires an inspection before it can be registered, please visit one of the 18 Air Care Colorado locations for an inspection and try again.


Where to Go

The Air Care Colorado Inspection and Maintenance (I/M) Program is a network of 18 stations conveniently located throughout the Denver-metropolitan area and the North Front Range. Additionally, 18 RapidScreen roadside data collection units are set up and rotated among state-approved locations throughout the program area.

Depending upon the vehicle, Air Care Colorado stations use three different testing methods to evaluate emissions as part of the overall emissions inspection. They are:

  • 1982-and-newer vehicles: either an I/M240 dynamometer (treadmill) test or On-Board Diagnostics (OBD) “plug-in” test
  • 1981-and-older vehicles: a two-speed idle test

    **Air Care Colorado stations DO NOT TEST DIESEL-POWERED VEHICLES.
    You can find a list of diesel emissions inspection stations by clicking on the link below.

Find inspection stations and RapidScreen sites near you, and diesel inspection stations, and county motor vehicle offices.

LOW PROFILE RIMS & OVERSIZED TIRES - Please note that front-wheel and all-wheel drive vehicles with low-profile rim sizes 17-inches-or-larger in diameter or vehicles with wheel sizes larger than 34 inches must be tested on special dynamometers capable of testing vehicles with these unusual features. Please take your vehicle to the Sheridan, Boulder, Ken Caryl or Fort Collins stations for inspection. These are the only stations in the program area equipped with specialized dynamometers that can test these vehicles.

© 2018 Envirotest