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Illinois · Free Case Value Calculator

Illinois Lemon Law Buyback Calculator

Estimate your lemon law recovery for a defective vehicle. Our free calculator applies your state's specific lemon law — repair attempt thresholds, days out of service requirements, coverage periods, and buyback formulas — to your vehicle's defect history under Illinois's specific laws.

What's My Illinois Case Worth?

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Quick answer

In Illinois, you generally have 18 months to file a lemon law claim. What your case is worth depends on your specific damages and Illinois's laws. Use the calculator below for a free estimate of your low-to-high range.

Key Illinois Laws

Filing Deadline18 months
shorter than the national average of 2.4 years
Repair-Attempt Presumption4 attempts
Failed repairs that presume a lemon
Days Out of Service30 business days
Cumulative days that presume a lemon
Used VehiclesNew only
Used cars: see federal Magnuson-Moss

How Illinois Law Affects Your Lemon Law Case

In Illinois, a lemon law buyback (repurchase) refunds what you paid for the vehicle minus an allowance for the use you got from it. Under 815 ILCS 380/3(c) that allowance is the amount directly attributable to wear and tear from use before the first report of a nonconformity to the seller, and during any later period when the vehicle is not out of service for repair. The statute sets no mileage divisor, so our calculator's allowance is only an estimate: it divides the mileage you enter for when the defect first appeared by 120,000, the figure California's and Florida's lemon statutes use, and multiplies by the price. A licensed attorney can confirm how the allowance applies to your purchase or lease.

Illinois recognizes a "lemon presumption" that shifts the burden to the manufacturer once your repair history crosses set thresholds. If the dealer cannot fix the same substantial, warranty-covered defect after 4 repair attempts, or if the vehicle is out of service for a cumulative 30 business days, the vehicle is presumed to be a lemon. This presumption generally applies within the first 12 months or 12,000 miles of ownership.

Illinois's state lemon law generally covers new vehicles purchased with a manufacturer's warranty. If your vehicle is used or falls outside the state statute, you may still have a claim under the federal Magnuson-Moss Warranty Act, which applies to written warranties nationwide.

You generally have 18 months to bring a lemon law claim in Illinois, shorter than the national average of 2.4 years. Acting before the warranty expires and while repair records are fresh protects your claim. When a vehicle qualifies, Illinois requires the manufacturer to repurchase or replace it rather than keep attempting repairs. Illinois's lemon law (the New Vehicle Buyer Protection Act, 815 ILCS 380) has no attorney-fee provision. The federal Magnuson-Moss Warranty Act lets a court award a consumer who wins a warranty case costs and attorney fees (15 U.S.C. 2310(d)(2)).

How Does Illinois Compare?

18 mo
Filing Deadline
Avg: 2.4 yrs
Modified
Fault System
Modified Comparative Fault (51% Bar)

Illinois Lemon Law FAQs

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Legal Disclaimer

This calculator uses Illinois's statutes as of 2026-09-22. Laws change frequently. This tool provides estimates for informational purposes only and does not constitute legal advice. Verify current rules with an Illinois-licensed attorney before making decisions about your case. Learn about our methodology.

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Answer a few questions about your situation. Our calculator applies Illinois's specific laws and real case data to estimate your settlement value instantly.

What's My Illinois Case Worth?