Illinois Car Inspection Laws
Requirements, costs, what gets checked, and what it means when buying or selling a vehicle in Illinois.
Illinois requires emissions testing in the Chicago metro area (Vehicle Emissions Inspection Program) but not statewide safety inspections.
Inspection at a Glance
What Gets Checked
- ✓OBD-II scan
- ✓Tailpipe emissions (older vehicles)
- ✓Gas cap test
Outside the Chicago metro area, Illinois has no routine vehicle inspection requirement. When selling in covered counties, ensure a valid emissions certificate is available.
Inspection and Vehicle Sales in Illinois
Whether the vehicle passed or failed, disclose the current inspection status to buyers. Include it in your bill of sale for legal protection.
A signed bill of sale noting the vehicle's inspection status — and that the buyer accepts it — protects you from post-sale disputes.
Even where inspections are not legally required, buyers should always request a pre-purchase inspection by an independent mechanic before finalizing any used vehicle sale.
Frequently Asked Questions
Does Illinois require a car inspection to sell a vehicle?
Illinois requires emissions testing in the Chicago metro area (Vehicle Emissions Inspection Program) but not statewide safety inspections.
How often is vehicle inspection required in Illinois?
Emissions testing required every two years for vehicles in covered counties (primarily Cook, DuPage, Kane, Lake, Madison, McHenry, St. Clair, Will).
How much does a car inspection cost in Illinois?
Emissions test fee varies by vehicle type and test site.
Does Illinois require emissions testing?
Emissions testing applies to gasoline vehicles in northeastern Illinois counties. Diesel vehicles, vehicles over 8,500 lbs GVWR, and vehicles registered in non-covered counties are exempt.
What happens if a car fails inspection in Illinois?
If a vehicle fails inspection in Illinois, you typically have a set period to make repairs and re-test. Driving with a failed or expired inspection sticker may result in fines. Contact Illinois EPA for specific reinspection rules.
Can I sell a car that failed inspection in Illinois?
In most states including Illinois, you can sell a vehicle that has failed inspection — but you must disclose the failure to the buyer. Many buyers will negotiate a price reduction to cover repairs. Using a bill of sale that notes the condition protects both parties.