Illinois Lemon Law: What You Need to Know Before Filing
If your new vehicle has been in and out of the shop for the same problem — and the dealer still can't fix it — Illinois lemon law may give you the right to a buyback, replacement, or refund. This guide walks you through how the law works in Illinois, what qualifies, and how to pursue a claim on your own. This is general information, not legal advice — consult a licensed attorney in your state.
Which Vehicles Does Illinois Lemon Law Cover?
Illinois lemon law covers new cars, trucks, and SUVs purchased or leased in Illinois under the manufacturer's original warranty, used primarily for personal or family purposes. Motorcycles and off-road vehicles may not qualify. Used vehicles are generally excluded, though separate consumer protections may apply.
The Repair-Attempt Threshold: When Does a Car Become a Lemon?
Illinois law sets out a "reasonable number of repair attempts" standard. In general terms, a vehicle may qualify if the same defect has been subject to repair attempts multiple times without being resolved, or if the vehicle has been out of service for a significant number of days during the warranty period due to repairs. The defect must substantially impair the vehicle's use, market value, or safety — minor cosmetic issues typically don't count.
These thresholds and timeframes are specific in the statute and can change. Do not rely on any single source: check the repair-attempt counts, out-of-service limits and filing deadlines against the Attorney General's current Lemon Law publication, or ask a licensed attorney.
What Remedies Could You Get?
If your vehicle qualifies, the manufacturer may be required to repurchase it or replace it with a comparable new vehicle. A buyback typically returns your purchase price, taxes, and fees minus a mileage offset for miles driven before you first reported the defect. Neither outcome is guaranteed; it depends on your defect, repair history, and your state's formula.
How to Build Your Claim Without a Lawyer
- Gather every repair order — date, mileage, and the dealer's written description of the problem and work performed.
- Log each repair visit in a simple spreadsheet: date in, date out, days out of service, defect described.
- Pull your warranty booklet and confirm the defect occurred within the covered period.
- Send a written notice to the manufacturer (certified mail) describing the defect and your repair history — this creates a paper trail and may be required before arbitration.
- File with the manufacturer's arbitration program. BBB Auto Line handles many major brands; check the manufacturer's warranty booklet for which program applies.
- If arbitration fails, you may file in Illinois civil court. At that stage, consulting a licensed attorney is worth serious consideration.
Estimate Your Potential Buyback
You can estimate your buyback for a rough idea of what a repurchase might look like based on your purchase price and mileage at first report of the defect. Use it as a planning tool — your actual buyback or refund may be higher or lower, is determined by the manufacturer and your state's formula, and is not guaranteed. Verify current rules with the Illinois Attorney General, your warranty, or a licensed attorney.
Lemon Law Pushback provides general information and estimates to help you understand lemon law claims. It is not legal advice, and no outcome is guaranteed. Lemon laws, repair-attempt thresholds, and deadlines vary by state and can change — verify with your state Attorney General or DMV, your warranty, or a licensed attorney.
Illinois Counts 30 Business Days — Which Is Six Calendar Weeks
The Illinois threshold reads like the common one and is not. Where most states count 30 calendar days out of service, Illinois counts 30 business days. Excluding weekends alone, that is about six calendar weeks of repair time; with public holidays it is longer still. An owner who assumes calendar days will conclude they qualify weeks before they actually do.
Illinois also runs the tightest window of any state here. The vehicle must be within its first 12 months or 12,000 miles, whichever occurs first — half the period Texas, Arizona, Georgia and New Jersey allow. Combined with a 12-month filing deadline, the practical effect is that an Illinois claim has to be recognised and acted on quickly.
| Element | Illinois | How that compares |
|---|---|---|
| Repair attempts for the same defect | 4 | Three states use 3, four use 4 — see the full comparison |
| Days out of service | 30 business days | Florida requires only 15; Colorado counts 24 business days |
| Within | the first 12 months or 12,000 miles, whichever occurs first | Illinois allows 12 months or 12,000 miles; Texas twice that |
| Deadline to file the claim | Within 12 months of the purchase date | Virginia 18 months; New York four years |
| Arbitration | The manufacturer's certified third-party programme must be used first | New York lets you choose court instead |
| Vehicles excluded | Used cars, altered or modified vehicles, motorcycles, boats | Light trucks and vans under 8,000 pounds are covered |
You cannot start an Illinois claim through the dealer. The Attorney General makes this point explicitly, because it is where claims are lost: owners spend months pressing the dealership, believing they are proceeding under the Lemon Law, and the 12-month filing period expires. The claim goes to the manufacturer's designated representative, and the manufacturer's third-party dispute resolution programme — details are in your ownership manual — has to be used before you can assert the statutory presumption. If the board rules in your favour the manufacturer cannot dispute the decision; if it rules against you, you can still bring a civil action.
Four Attempts, or the Days — Not Both
Coverage requires a nonconformity that substantially impairs use, market value or safety and is either not repairable in at least four attempts for the same repair, or leaves the vehicle out of service for a total of 30 or more business days. These are alternatives. Recreational vehicles are covered, trailers are not.
Illinois Lemon Law: What Owners Ask
Are the 30 days business days or calendar days in Illinois?
Business days. That is roughly six calendar weeks once weekends are excluded, and longer with public holidays. It is the single most misread figure in the Illinois statute, because most other states count calendar days.
How long is the Illinois coverage window?
A year of ownership or twelve thousand miles on the odometer, whichever arrives sooner — the narrowest window of any state on this site. The filing deadline runs on a separate twelve-month clock from the purchase date.
Can I start my claim at the dealership?
No, and this is the most common way Illinois claims fail. The claim goes to the manufacturer's designated representative. Time spent pressing the dealer does not preserve anything, and the 12-month deadline continues to run.
Do I have to use the manufacturer's arbitration programme?
Yes, before you can rely on the statutory presumption that a reasonable number of repair attempts has been made. The programme is identified in your vehicle ownership manual. If the board decides against you, a civil action remains available; if it decides for you, the manufacturer cannot dispute it.
What vehicles does the Illinois law cover?
New cars bought or leased in Illinois, light trucks and vans under 8,000 pounds, and recreational vehicles excluding trailers. Used cars, altered or modified vehicles, motorcycles and boats are outside it.
What can I get?
A replacement vehicle of like or similar value, or a buyback less an allowance for the miles you drove. The choice between them is not always yours, which is a reason to state your preference clearly in the filing.
Sources. The thresholds and procedural requirements on this page come from Illinois Attorney General, Things You Should Know About Lemon Law (New Vehicle Buyer Protection Act, 815 ILCS 380). Comparative figures for other states come from the equivalent authority in each, listed on the comparison page.