What Is Wisconsin’s Lemon Law? Notice, Refund, and Arbitration

Wisconsin’s lemon law, found at Wisconsin Statute 218.0171, lets you demand a full refund or a comparable replacement vehicle when the manufacturer of a new car, truck, motorcycle, or motor home cannot fix a serious warranty defect within a reasonable number of tries. “Reasonable” has a specific meaning here: four failed repair attempts on the same problem, or 30 cumulative days out of service for any combination of warranty defects. You have up to 36 months from the vehicle’s first delivery to sue if the manufacturer refuses to make you whole.¹

Who and What the Law Covers

The statute protects consumers who purchase, lease, or take delivery of a new motor vehicle in Wisconsin. Cars, trucks, motorcycles, and motor homes all qualify. Demonstrator and executive-driven vehicles count as new as long as they have not been titled, or were titled only by the manufacturer or dealer. Mopeds, semitrailers, and trailers designed for use with a truck or truck tractor are excluded.¹

The definition of “consumer” is broader than you might expect. It covers the original purchaser, a lessee, and anyone the vehicle is transferred to while the manufacturer’s express warranty is still in effect, as long as the vehicle was not acquired for resale. A business buying a new truck for its own operations qualifies. So does a second owner who takes over the vehicle before the warranty runs out.²

Vehicles with a gross vehicle weight rating or actual gross weight above 10,000 pounds fall into a separate “heavy-duty” category. They are still covered, but some of the replacement and refund provisions work differently.²

What Makes a Vehicle a Lemon

The defect has to be a “nonconformity” — a condition covered by the manufacturer’s warranty that substantially impairs the vehicle’s use, value, or safety. Transmission failures, recurring electrical problems, and brake defects are the kinds of issues that typically qualify. Damage you caused through misuse, neglect, or unauthorized modifications does not.¹

Once you report the problem within the rights period, the vehicle is presumed to be a lemon if either of two thresholds is met:

The same nonconformity has been subject to repair four or more times and still exists.
The vehicle has been out of service for 30 or more cumulative days because of any combination of warranty defects. Those days do not have to be consecutive, and Wisconsin courts have interpreted “days” to include weekends and holidays.¹

Hitting either threshold shifts the burden to the manufacturer to prove the vehicle is not a lemon.

The Rights Period: Your Reporting Window

You have to report the defect during the Lemon Law rights period, which runs for the shorter of the manufacturer’s express warranty or one year from the date the vehicle was first delivered to you. A two-year warranty does not buy you two years to report. A six-month warranty closes the window at six months.¹

Notifying the Manufacturer

After the vehicle meets one of the presumption thresholds, send written notice directly to the manufacturer requesting either a refund or a replacement. The manufacturer’s address is in the owner’s manual or warranty booklet. The statute does not require certified mail, but using it creates a dated delivery record that matters if the manufacturer later disputes receiving your notice.³

Describe the defect, list the dates and results of every prior repair attempt, and state clearly whether you want a refund or a replacement. The Wisconsin Department of Transportation publishes a form for this purpose: the Motor Vehicle Lemon Law Notice and Nonconformity Report (MV2691). This notice step is not optional. It gives the manufacturer one last chance to fix the problem before you become entitled to your chosen remedy.³

Refund or Replacement: The Choice Is Yours

If the manufacturer still cannot repair the defect after receiving your notice, you pick the remedy. The manufacturer cannot push you toward one over the other.³

A Refund

A refund includes the full purchase price, sales tax, finance charges, amounts paid at the point of sale, and collateral costs. Collateral costs are expenses you incurred because of the defect — a rental car while the vehicle was in the shop is the common example.³

The manufacturer may subtract a “reasonable allowance for use” for the miles you drove before reporting the defect. The formula caps the deduction: divide the vehicle’s mileage at the time you first reported the problem by 100,000, then multiply by the purchase price. On a $30,000 vehicle with 10,000 miles at the first repair visit, the maximum deduction works out to $3,000. For motorcycles, the divisor is 20,000 instead of 100,000, so the per-mile deduction is larger.³

A Replacement

If you choose a replacement, the manufacturer has 30 days from receiving your claim to agree in writing, then 45 days to deliver a comparable new vehicle. You return the defective vehicle with a properly endorsed certificate of title.

The timing cuts in your favor if the manufacturer misses the 45-day deadline. Your remedy then converts automatically to a full refund with no deduction for use, so the manufacturer loses the mileage-based allowance it would otherwise be entitled to.³

Arbitration Before You Can Sue

Wisconsin requires you to go through the manufacturer’s informal dispute settlement program before filing suit, but only if that program has been certified by the Department of Transportation. Certified arbitration is free, you do not need a lawyer, and the result is not binding on you. If you lose or disagree with the outcome, you can still take the manufacturer to court.³

If the manufacturer offers only a non-certified program, your participation is voluntary and you can skip straight to court without penalty.⁴

Filing Suit

You can file a civil lawsuit in Wisconsin circuit court if the manufacturer refuses to cooperate after arbitration, or if no certified program applies. The statute of limitations is 36 months from the date the vehicle was first delivered to a consumer. That clock starts at the original delivery, so a second owner inherits whatever time is left rather than getting a fresh three years.²

A consumer who prevails recovers pecuniary loss plus court costs, disbursements, and reasonable attorney fees, and the court may award equitable relief. In other words, winning means you do not absorb your own legal bill. One caution: if the court finds that either side failed to reasonably cooperate with the other’s attempts to resolve the claim, it can reduce the damages, fees, or costs otherwise awarded.²

Keep Every Piece of Paper

Documentation is what carries a lemon law claim. Every time you bring the vehicle in, keep the repair order and any written diagnosis. If the dealer holds the vehicle overnight or longer, note the drop-off and pick-up dates so you can prove the 30-day out-of-service count. Save rental car receipts and any other expenses tied to the defect, because those qualify as collateral costs in a refund.

The strongest claim is one with a paper trail showing you reported the same problem again and again and gave the manufacturer every reasonable chance to fix it. Arbitrators and judges rely on that record, so build it from the first repair visit forward.

1
Wisconsin State Legislature. Wisconsin Code 218.0171 – Lemon Law
2
Wisconsin State Legislature. Wisconsin Statutes 218.0171 – Motor Vehicle Purchasers Remedies
3
Wisconsin Department of Transportation. Wisconsin Lemon Law
4
Wisconsin State Legislature. Wisconsin Statutes 218.0171 – Motor Vehicle Purchasers Remedies