Car Inspection in IllinoisPage Overview
Illinois requires most vehicles to undergo smog and emissions testing by the state's Environmental Protection Agency (EPA) every two years. (Check our "Exempt Vehicles" section below.) You'll receive a notice when it's time to get your vehicle smog-checked.
The State of Illinois oversees the Vehicle Emissions Testing Program. You'll receive a notice when it's time to get your vehicle smog-checked.
When it's time to have your vehicle checked, drive it to your nearest emissions inspection station. Bring your test notice, if you have it. The results of the test will be automatically transmitted to the Secretary of State and the EPA.
Note that the type of test varies based on the type and age of the vehicle. Check the EPA's FAQ section for more details.
REMEMBER: While many states penalize drivers who don't bring in their vehicles for emissions testing by making it impossible and illegal to register and operate the vehicle, Illinoi takes things a step further by suspending the driver's license.
Most gasoline-powered cars model year 1996 or newer are subject to emissions testing after they are 4 years old. Heavy duty trucks 2007 or newer are also subject to testing if they weigh between 8,501 pounds and 14,000 pounds.
First, all diesel-powered vehicles and vehicles powered exclusively by electricity are exempt from emissions testing. (See "Illinois Incentives for Eco-Friendly Driving" below.)
(For more information about green-driving incentives, check our section on Green Driver State Incentives in Illinois.)
Second, certain ZIP codes throughout the following counties are exempt from testing:
- St. Clair
Understand, that doesn't mean ALL vehicles in these counties are exempt; just the areas under certain ZIP codes. Check the EPA for specific ZIP code information.
NOTE: All vehicles in the Counties of Cook, Dupage, and Lake must undergo smog testing, regardless of ZIP code.
As mentioned above, you don't have to bring in your vehicle for emissions testing if it is a diesel-powered vehicle or one powered exclusively by electricity.
There are other eco-friendly driving perks, too. For more information on how you can save money on auto insurance, federal tax credits, and more, visit our section on green driver incentives.
Illinois doesn't currently have a program for reporting gross polluters or smoking vehicles, but you can be proactive by reducing your own impact on the environment. See the Illinois EPA's Green Tips to find out how you can do more to reduce pollution.Local Smog Check Stations
Choose a County
- De Kalb
- De Witt
- Du Page
Other Topics in This Section
- Jo Daviess
- La Salle
- MC Donough
- MC Henry
- MC Lean
Organ Donation Survey
- Register Car
- Registration Renewal
- Registration & Insurance
- Replacing a Lost Registration
- RV & Motorhome Registration
- Custom Built Car Registration
- Boat Registration and Licenses
- Title Transfers
- Replacing a Lost Title
- Salvaged Vehicles
- Special Vehicles
- Drivers with Disabilities
- License Plates & Placards
- Car Inspection
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