Understanding the 18-Month/18,000-Mile Rule for Indiana Lemon Law Claims

Current as of: September 28, 2026 Lemon Law & Defective Vehicles Indiana
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In Indiana, you must report your vehicle's defect to the dealer within 18 months of delivery or before hitting 18,000 miles, whichever comes first. This is a strict statutory deadline for a valid Lemon Law claim.

Purchasing a new car should bring peace of mind, not endless trips to the mechanic. If you discover a significant defect in your new vehicle, the Indiana Motor Vehicle Protection Act (Ind. Code § 24-5-13) provides a powerful mechanism to demand a refund or a replacement. However, this consumer protection is strictly bound by time and mileage limitations. Understanding the '18-month or 18,000-mile rule' is absolutely critical to preserving your right to sue the manufacturer. If you believe your vehicle qualifies, reaching out to a local attorney from our directory can help you enforce your rights effectively.

The 18-Month/18,000-Mile Reporting Requirement

Under Ind. Code § 24-5-13-7, an Indiana consumer must report the nonconformity (defect) to the manufacturer, its agent, or authorized dealer no later than 18 months after the original delivery of the motor vehicle, or before the vehicle has been driven 18,000 miles after delivery, whichever occurs earlier. This requirement is often referred to as the 'Lemon Law rights period.' It is important to note that the defect simply needs to be reported within this window. If you report a transmission issue at 17,500 miles, and the dealer's failed repair attempts stretch until the car hits 20,000 miles, your claim is still valid because the initial report occurred within the statutory timeframe.

What if the Vehicle Hits 18,001 Miles While at the Dealership?

A common pain point for consumers in cities like Indianapolis or South Bend is the anxiety of crossing the 18,000-mile threshold while a mechanic is test-driving the car. If you dropped off your vehicle for a persistent engine stall at 17,990 miles and the dealership technician drives it over the 18,000-mile mark attempting to diagnose the issue, you are still protected. The legal trigger is the odometer reading at the exact moment you surrendered the vehicle to the authorized service center and signed the repair order. Your attorney will use the initial repair invoice as concrete proof that the report was timely.

How This Rule Applies to Demonstrator (Demo) Vehicles

Many buyers opt for 'demo' vehicles-cars driven by dealership personnel that are sold with existing mileage on the odometer. Under Ind. Code § 24-5-13-7(2)(B), the 18,000-mile term of protection begins on the date the vehicle is delivered to the buyer, rather than calculating from zero miles on the odometer. For example, if you buy a demonstrator vehicle in Fort Wayne that already has 4,000 miles on it, your statutory protection continues until the vehicle has been driven an additional 18,000 miles after delivery-ending when the odometer reaches 22,000 miles or when 18 months elapse, whichever occurs first.

Timelines and Deadlines for Filing Suit

Reporting the defect to the dealer is just the first step. If the manufacturer fails to repair the vehicle after a reasonable number of attempts, you must escalate the matter legally.

The 2-Year Statute of Limitations to File Suit

There is a distinct difference between the 18-month reporting period and the deadline to file a lawsuit. Under Ind. Code § 24-5-13-23, any lawsuit brought under the Indiana Motor Vehicle Protection Act must be commenced within two years of the date you first report the defect to the dealer. This means if you reported a faulty brake system exactly on the 10-month mark of ownership, your two-year countdown to file a formal complaint in the Marion County Superior Court, Indianapolis or another local court begins on that exact date. Waiting too long and attempting to negotiate with customer service without legal counsel can cause you to permanently miss this deadline.

Tolling the Statute of Limitations During Extended Repair Times

In some circumstances, the statute of limitations can be temporarily paused, or 'tolled.' If your vehicle spends 45 consecutive days sitting in a dealership lot in Evansville waiting for a backordered transmission part, your attorney may argue that the limitations period should be tolled for those 45 days. However, tolling is complex and heavily dependent on specific case facts. It is strongly advised not to rely on tolling to save an expiring claim. Always file your lawsuit well within the standard two-year window.

Legal Fees and Costs

Many consumers avoid hiring a lawyer because they fear high upfront costs. Fortunately, the Indiana Lemon Law includes a fee-shifting provision. If you win your case, the manufacturer is generally ordered to pay your reasonable attorney's fees. Most Lemon Law attorneys in Indiana work on a contingency fee basis, meaning they do not charge you an hourly rate out of pocket. Instead, their fees are covered by the automaker when a successful settlement or verdict is reached.

Frequently Asked Questions (FAQ)

Does the Lemon Law cover used cars in Indiana?

Generally, no. The Indiana Lemon Law applies to motor vehicles sold or leased to a buyer in Indiana that are covered by a manufacturer's warranty. Standard used cars sold 'as is' are not protected, though there are separate federal laws like the 15 U.S.C. § 2301 that might apply.

What if my warranty lasts for 3 years or 36,000 miles?

While your factory warranty may be longer, the specific, powerful protections of the Indiana Lemon Law only apply to defects reported within the first 18 months or 18,000 miles. Defects occurring after this period fall under standard breach of warranty claims.

Do I have to go through arbitration before suing?

If the manufacturer has an informal dispute settlement procedure that complies with federal regulations, Indiana law requires you to use that process before filing a lawsuit. Your attorney can help you navigate this mandatory arbitration phase.

What qualifies as a 'nonconformity'?

A nonconformity is a specific defect or condition that substantially impairs the use, market value, or safety of the motor vehicle. Minor annoyances like a rattling speaker generally do not qualify, but engine, transmission, or major electrical failures do.


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