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Lemon Law Demand Letter — Illinois

In Illinois, a new vehicle is presumed a lemon if, within the first 12 months after delivery or 12,000 miles, whichever comes first, it has had at least four repair attempts for the same problem, or the vehicle out of service for a total of 30 or more business days. Below is a ready-to-edit lemon law demand letter with Illinois's statute — the New Vehicle Buyer Protection Act — already cited; add your vehicle and repair history, then send it to the manufacturer.

Illinois at a glance

  • Coverage window: the first 12 months after delivery or 12,000 miles, whichever comes first.
  • The tests: at least four repair attempts for the same problem, or the vehicle out of service for a total of 30 or more business days.
  • What this letter does: the written record that starts your claim — Illinois routes lemon-law claims through the manufacturer’s third-party dispute resolution program, and this letter to the manufacturer’s designated representative is how you initiate it and document your demand.
  • Where it escalates: the manufacturer’s Industry Third Party Dispute Resolution Program (details are in your owner’s manual); if you disagree with its decision you may sue, but the manufacturer is bound by it.
  • Certified mail with return receipt gives you dated proof you initiated your claim inside Illinois’s short 12-month filing window.
  • Illinois has one of the shortest windows of any state: coverage is the first 12 months or 12,000 miles, and Lemon Law complaints must be filed within 12 months of the purchase date.

Lemon Law Demand Letter

Copy the letter below into the editor, replace the text in [brackets] with your details, and PostPal will print and mail it for you.

Subject: Lemon Law Notice — Demand for Repurchase or Replacement
[Your Name]
[Your Address]
[City, Illinois ZIP Code]
[Your Phone Number]
[Your Email]

[Date]

[Manufacturer Name] — Customer Relations / Owner Relations
[Manufacturer Address — listed in your warranty booklet or owner's manual]

RE: Lemon law claim under the Illinois New Vehicle Buyer Protection Act (815 ILCS 380)
Vehicle: [Year] [Make] [Model], VIN [VIN]

Dear [Manufacturer Name] Owner Relations,

I am the [owner / lessee] of a [Year] [Make] [Model], VIN [VIN], purchased [or leased] new on [Purchase Date] from [Dealer Name] in [City], Illinois.

Since delivery, the vehicle has exhibited the following defect: [describe the defect and how it impairs the vehicle's use, value, or safety]. The vehicle has been presented to your authorized dealer for repair of this defect on the following occasions:

• [Date] — [Repair order #] — [What was done]
• [Date] — [Repair order #] — [What was done]
• [Date] — [Repair order #] — [What was done]

In total, the defect has been subject to [number] repair attempts, and the vehicle has been out of service for [number] days. The defect remains uncorrected.

Under the Illinois New Vehicle Buyer Protection Act (815 ILCS 380), a manufacturer that cannot repair a nonconformity that substantially impairs the use, market value, or safety of a new vehicle — after at least four repair attempts for the same problem, or with the vehicle out of service a total of 30 or more business days, within the first 12 months or 12,000 miles — must replace the vehicle or refund the purchase price, less a reasonable allowance for use.

This letter is my formal notice of a Lemon Law claim and my demand for a replacement vehicle of like or similar value [or: a repurchase of the vehicle]. Please forward the information and forms for your third-party dispute resolution program to me at the address above. Note that I am initiating this claim within the 12-month period the Act allows; if it is not resolved through your program, I will pursue my remedies in court without further notice.

Copies of my repair orders are available on request. Please respond in writing to the address above.

Sincerely,
[Your Signature]
[Your Printed Name]

What your lemon law demand letter must include

  • Your full name, address, and contact details
  • The vehicle’s year, make, model, and VIN, plus the purchase/lease date and selling dealer
  • A clear description of the defect and how it impairs the vehicle’s use, value, or safety
  • The full repair history: dates, repair-order numbers, and days out of service (Illinois looks for at least four repair attempts for the same problem, or the vehicle out of service for a total of 30 or more business days)
  • What you are demanding — a repurchase (refund) or a comparable replacement vehicle
  • A deadline for the manufacturer to respond, and where to send its response

Frequently asked questions

When does a car qualify as a lemon in Illinois?

The defect must substantially impair the vehicle's use, value, or safety, and the manufacturer must have had a reasonable chance to fix it — in Illinois that is presumed within the first 12 months after delivery or 12,000 miles, whichever comes first, after at least four repair attempts for the same problem, or the vehicle out of service for a total of 30 or more business days. Keep every repair order; the paper trail is the claim.

Do I need to use an official form?

There is no state form. Claims go through the manufacturer’s own dispute resolution program — you initiate by contacting the manufacturer’s designated representative, who sends you the program’s forms. This letter is how you start that process in writing and preserve proof that you did so within the 12-month deadline. Claims cannot be initiated through the dealer.

Who do I send the letter to — the dealer or the manufacturer?

The manufacturer. Lemon law obligations run against the vehicle manufacturer, not the selling dealer — send it to the manufacturer’s customer/owner relations address listed in your warranty booklet or owner’s manual (PostPal’s where-to-mail directory also lists head-office addresses for major automakers like Ford, General Motors, and Tesla). Keep dealing with the dealer for the repairs themselves.

What happens after I send it?

The manufacturer’s dispute resolution board evaluates your claim. If it rules for you, you get a replacement vehicle of like or similar value, or a buyback less a mileage allowance. If you’re dissatisfied with the decision you can still sue — but the manufacturer can’t dispute the board’s decision. Act fast: complaints must be filed within 12 months of the purchase date.

More lemon law demand letter templates for other states

Facts verified against official sources on September 2, 2026: illinoisattorneygeneral.gov, illinoisattorneygeneral.gov.

This template is provided for convenience only. It is not legal advice and does not create a lawyer-client relationship. Court limits and rules change — confirm anything time-sensitive on the official page, and consult a qualified legal professional for advice specific to your situation.