Where to Get Emissions Testing in Markham

Markham is in Cook County, which requires emissions testing for most vehicles. You cannot test your vehicle at a private repair shop — testing must happen at an Illinois EPA-licensed emissions testing station. These stations are separate facilities, not part of a dealership or general mechanic's shop.

To find a licensed station near you, use the Illinois Environmental Protection Agency's online station locator at www2.illinois.gov/epa. Search by zip code (60426 for Markham) or city name. The locator shows each station's address, phone number, and hours. Call ahead before you go — some stations have limited hours or may be temporarily closed.

Stations in and around Markham typically charge between $25 and $35 for a basic emissions test. The fee is set by each station, so prices vary. Some stations offer discounts if you fail and need to retest after repairs.

Key Takeaways

  • Markham is in Cook County, which requires emissions testing for most vehicles registered there.
  • You must test at an Illinois EPA-licensed emissions testing station, not at a repair shop or dealership.
  • Use the Illinois EPA's online station locator to find licensed stations by zip code and check their hours before visiting.
  • Testing costs between $25 and $35 per vehicle, and you will receive a printed test result on the same day.
  • Your vehicle must pass the test before you can renew your registration with the Secretary of State.

What Documents and Information You Need to Bring

Bring your vehicle's registration or title. The testing station will need your vehicle identification number (VIN), which appears on your registration, title, and on the driver's side of your windshield. You do not need to bring proof of insurance or a driver's license, though having your ID is a good idea.

If your vehicle has failed a previous emissions test, bring the failure notice. Some stations use this to understand what repairs were attempted and whether the vehicle is now ready to retest. If you have had repairs done since the last test, bring the repair receipt — this is not required, but it helps the technician understand what was fixed.

How the Testing Process Works

When you arrive, you will check in at the station's front desk and provide your vehicle information. A technician will perform a tailpipe test, which measures the emissions coming from your exhaust. The vehicle is usually placed on a dynamometer (a machine that simulates driving) or tested while idling, depending on the station's equipment and your vehicle's year and type.

The test takes 10 to 20 minutes. You will receive a printed result when ready — either a pass or a fail. If you pass, the result is valid for two years and you can renew your registration. If you fail, the result shows which emissions standards your vehicle did not meet. You will have time to make repairs and retest before your registration expires.

What Happens If Your Vehicle Fails

A failed test does not prevent you from driving your vehicle — it only prevents you from renewing your registration until you pass. You have until your registration expiration date to retest. Most people take their vehicle to a repair shop after a failure to have the emissions system diagnosed and repaired.

Common reasons for failure include a faulty oxygen sensor, a malfunctioning catalytic converter, or an engine problem that triggers the check engine light. A repair shop can run a diagnostic scan to identify the issue. After repairs, you return to the testing station to retest. There is no limit to how many times you can retest, though each test costs the standard fee.

If you cannot afford repairs when ready, you may be able to renew your registration anyway by requesting a waiver from the Illinois EPA. Waivers are available in limited circumstances — typically if you have spent $500 or more on repairs and still cannot pass, or if your vehicle is very old. Contact the testing station or the Illinois EPA directly to learn whether a waiver is an option for your situation.

Timing and Registration Renewal

Plan to test your vehicle at least two weeks before your registration expires. This gives you time to receive your test result and, if needed, make repairs and retest. The testing station sends your passing result electronically to the Illinois Secretary of State, but there can be a delay of a few days before the result appears in their system.

You can renew your registration online through the Secretary of State's website, by mail, or in person at a local Secretary of State office. You cannot complete registration renewal until your emissions test result is recorded in the state system. If your registration expires before your test result is recorded, you risk a late renewal fee.

Special Cases: Diesel Vehicles and Older Cars

If you own a diesel vehicle, some testing stations do not perform diesel emissions tests. Call ahead to confirm the station tests diesel engines. Diesel tests follow different standards than gasoline vehicles and not all stations are equipped for them.

Vehicles older than 1996 are exempt from emissions testing in Illinois, even in Cook County. If your vehicle was manufactured before 1996, you do not need to test it. Vehicles from 1996 onward must test. If you are unsure of your vehicle's model year, check your registration or title.

Frequently Asked Questions

Can I test my vehicle anywhere in Illinois, or does it have to be in Markham?

You can test at any Illinois EPA-licensed station in the state, not just in Markham. However, your vehicle must be registered in Cook County (Markham's county) for Cook County testing requirements to explore. If you move or change your registration to a different county, that county's testing rules take effect.

What if the check engine light is on?

Most stations will not test a vehicle with the check engine light illuminated. The light indicates an emissions-related fault that must be diagnosed and repaired first. Take your vehicle to a repair shop to have the fault code read and the problem fixed, then return to the testing station.

How long is an emissions test result valid?

A passing result is valid for two years from the test date. You can renew your registration anytime during that two-year window without retesting. When the two years are up, you must test again to renew your registration for another two years.

What if I just bought a used car in Markham?

If you registered the vehicle in Cook County, you must have it tested before you can renew the registration. The previous owner's test result does not transfer to you. You will need to test under your new registration. Check your registration expiration date — you must test before that date arrives.

Can I test my vehicle if it is not currently registered?

You can test an unregistered vehicle, but the result will not be recorded in the state system until you register it. Most people register first, then test, so the result is when ready linked to their registration. Contact the testing station if you have questions about the order of these steps.