Montana Lemon Law Guide: Your Rights Under Montana Lemon Law

If you have recently purchased or leased a new vehicle in Montana and it spends more time in the repair shop than on the road, you may be protected by the state's lemon law. Officially known as the New Motor Vehicle Warranty Act, the Montana Lemon Law provides a legal remedy for consumers who end up with defective vehicles. Navigating the legal requirements can be complex, but understanding your rights is the first step toward getting the compensation or replacement vehicle you deserve.

This comprehensive guide explains the Montana Lemon Law, what qualifies as a lemon, the claims process, and how a Montana lemon law attorney can help you protect your consumer rights.

What Is the Montana Lemon Law?

The Montana Lemon Law, formally cited as the New Motor Vehicle Warranty Act under Montana Code Annotated (MCA) § 61-4-501 et seq., is a state statute designed to protect consumers who purchase or lease new motor vehicles that fail to conform to the manufacturer's express warranties.

The law requires manufacturers to repair substantial defects that impair the use, market value, or safety of a new vehicle. If the manufacturer or its authorized dealers cannot fix the defect after a reasonable number of attempts, the law mandates that the manufacturer must either replace the vehicle or refund the purchase price to the consumer.

The Montana Department of Justice's Office of Consumer Protection oversees consumer rights in the state and provides resources for consumers dealing with defective vehicles. The law serves as a powerful tool to ensure that manufacturers stand behind their warranties and that consumers are not left bearing the financial burden of a defective product.

Which Vehicles Qualify Under the New Motor Vehicle Warranty Act?

Not every vehicle on the road is covered by the Montana Lemon Law. The statute has specific criteria regarding the types of vehicles, their condition, and the timeframe within which the defects must occur.

New vs. Used Vehicle Coverage

The Montana Lemon Law strictly applies to new motor vehicles. Used vehicles are not covered under this specific statute. If you purchased a used car that turns out to be defective, you will not be able to file a claim under the state lemon law, though you may have other legal remedies under the federal Magnuson-Moss Warranty Act or general contract law if the vehicle was sold with a warranty.

Leased Vehicle Coverage

Consumers who lease new motor vehicles for personal, family, or household purposes are fully protected under the Montana Lemon Law. The law treats lessees similarly to purchasers, ensuring that those who lease defective vehicles have the same rights to a replacement or refund.

Mileage and Time Limitations

To qualify for protection under the Montana Lemon Law, the defect must be reported to the manufacturer or its authorized dealer during the statutory "warranty period." Under MCA § 61-4-501(7), the warranty period is defined as the period ending two years after the date of the original delivery of the new motor vehicle to the consumer, or during the first 18,000 miles of operation, whichever occurs first.

Vehicle Types Covered

The law covers passenger motor vehicles propelled by their own power, designed primarily to transport persons or property upon public highways. This includes:

  • Cars, SUVs, and light trucks
  • The nonresidential portion of motor homes (RVs)

However, the law explicitly excludes:

  • Trucks with a gross vehicle weight rating (GVWR) of 15,000 pounds or more
  • Motorcycles
  • Components, systems, fixtures, appliances, furnishings, accessories, and features of motor homes that are designed, used, and maintained primarily for residential purposes
  • Non-motorized and off-road vehicles

What Qualifies as a "Lemon" in Montana?

A vehicle does not automatically become a lemon just because it needs a repair. The Montana Lemon Law establishes specific thresholds, known as presumptions, to determine when a manufacturer has had a "reasonable number of attempts" to fix the vehicle.

Number of Repair Attempts Required

Under MCA § 61-4-504, a reasonable number of attempts is presumed to have been made if the same nonconformity (defect) has been subject to repair four or more times by the manufacturer, its agent, or authorized dealer during the warranty period, but the nonconformity continues to exist.

Days Out of Service Threshold

Alternatively, a vehicle may qualify as a lemon if it is out of service because of nonconformity for a cumulative total of 30 or more business days during the warranty period after the manufacturer, agent, or dealer has been notified.

Substantial Impairment Standard

The defect or condition must "substantially impair the use, market value, or safety of the motor vehicle to the consumer." Minor annoyances, trivial cosmetic flaws, or issues that do not significantly affect the vehicle's operation or value do not qualify. Furthermore, the law does not cover defects that are the result of abuse, neglect, or unauthorized modifications or alterations by the consumer.

The Montana Lemon Law Claims Process

If you believe your vehicle qualifies as a lemon under Montana law, you must follow specific steps to preserve your rights and pursue a claim.

Required Steps and Manufacturer Notification

  1. Report the Defect: You must report the defect to the manufacturer or its authorized dealer within the warranty period (2 years or 18,000 miles).
  2. Allow Repair Attempts: Give the dealer the opportunity to repair the vehicle, keeping track of the number of attempts and days out of service.
  3. Written Notification: If the vehicle is not repaired after a reasonable number of attempts, you must notify the manufacturer in writing. The manufacturer must clearly disclose in the warranty or owner's manual that written notification is required before you are eligible for a refund or replacement, and must provide the address where the notice should be sent. It is highly recommended to send this notice via certified mail, return receipt requested.

Documentation Requirements

Thorough documentation is critical to a successful lemon law claim. You should maintain a comprehensive file that includes:

  • The purchase or lease contract
  • All repair orders and invoices (ensure they accurately reflect the date the vehicle was brought in, the date it was returned, the mileage, and the specific complaints you reported)
  • Copies of all correspondence with the dealer and manufacturer, including the written notification
  • Maintenance records showing the vehicle was properly cared for

Arbitration Requirements

Before you can file a lawsuit under the Montana Lemon Law, you may be required to participate in an informal dispute settlement procedure (arbitration), provided the manufacturer has established a program that is certified by the Montana Department of Justice to comply with federal regulations (Title 16, Code of Federal Regulations, Part 703).

If the manufacturer's program is certified, you must first resort to that procedure. If you are not satisfied with the arbitration decision, you may then pursue legal action in court. The Montana Department of Justice also provides an independent forum and arbitration procedure for the settlement of disputes.

Timeline Expectations

The timeline for a lemon law claim can vary. If you go through a certified arbitration program, the process is generally designed to reach a decision within 60 days. If the dispute escalates to litigation, the process can take several months to over a year, depending on the complexity of the case and the court's schedule.

Remedies and Compensation Under Montana Law

If your vehicle is determined to be a lemon, the manufacturer is legally obligated to provide one of two primary remedies under MCA § 61-4-503.

Vehicle Replacement

The manufacturer must replace the defective vehicle with a new motor vehicle of the same model and style and of equal value. If a replacement of the same model and style is impossible due to lack of availability, the manufacturer must provide a motor vehicle of comparable market value.

Repurchase and Refund

As an alternative to replacement, the manufacturer may accept the return of the vehicle and refund the full purchase price to the consumer. The refund must include:

  • The full purchase price
  • Reasonable collateral charges (such as sales tax, property tax, license and registration fees)
  • Incidental damages (such as towing or rental car costs)

Mileage Offset Deduction: The manufacturer is allowed to deduct a "reasonable allowance for use." Under Montana law, this deduction is calculated using a specific statutory formula: the total contract price of the vehicle multiplied by a fraction where the denominator is 100,000 and the numerator is the number of miles the vehicle traveled prior to the manufacturer's acceptance of its return.

Attorney's Fees and Civil Penalties

While the Montana Lemon Law statute (MCA 61-4-501 et seq.) focuses on the replacement and repurchase remedies, consumers who must litigate their claims often seek remedies under the federal Magnuson-Moss Warranty Act, which includes provisions for the recovery of attorney's fees and court costs if the consumer prevails. Additionally, violations of the Montana Lemon Law are considered unfair or deceptive trade practices under the Montana Consumer Protection Act, which may allow for further damages or penalties.

When to Hire a Montana Lemon Law Attorney

Dealing with a defective vehicle is frustrating, and facing off against a major automotive manufacturer can be intimidating. Hiring a qualified Montana lemon law attorney can significantly level the playing field.

Complexity of Claims

Lemon law cases involve strict statutory deadlines, specific notification requirements, and complex calculations for mileage offsets. An attorney understands the nuances of the New Motor Vehicle Warranty Act and can ensure that all procedural requirements are met.

Manufacturer Resistance Patterns

Automakers have teams of lawyers dedicated to minimizing their liability. They may argue that the defect does not substantially impair the vehicle, that the issue was caused by consumer abuse, or that they have not been given a reasonable number of repair attempts. An experienced attorney knows how to counter these tactics and build a compelling case using your repair records and expert testimony if necessary.

Fee Structure

Many consumers worry about the cost of hiring legal representation. Fortunately, most lemon law attorneys work on a contingency fee basis or utilize fee-shifting statutes like the Magnuson-Moss Warranty Act. This means that the attorney's fees are typically paid by the manufacturer if you win the case, and you pay little to nothing out of pocket.

What to Look for in an Attorney

When seeking representation, look for an attorney who specializes in consumer protection and lemon law cases in Montana. They should have a proven track record of successfully negotiating with manufacturers and navigating the arbitration process.

Frequently Asked Questions About Montana Lemon Law

Does the Montana Lemon Law cover used cars?

No, the Montana Lemon Law strictly applies to new motor vehicles. Used vehicles are not covered under the state's New Motor Vehicle Warranty Act, even if they are still under the manufacturer's original warranty. However, you may have rights under the federal Magnuson-Moss Warranty Act.

How long do I have to file a lemon law claim in Montana?

The defect must occur and be reported within the warranty period, which is two years from the date of original delivery or 18,000 miles, whichever comes first. If the manufacturer fails to repair the vehicle, you should initiate your claim promptly. The statute of limitations for filing a lawsuit based on a statutory violation in Montana is generally two years.

Are leased vehicles covered under the Montana Lemon Law?

Yes, the law explicitly includes lessees in its definition of a "consumer." If you lease a new vehicle for personal, family, or household purposes and it turns out to be a lemon, you are entitled to the same remedies as a purchaser.

What if my vehicle is a heavy-duty truck or an RV?

The Montana Lemon Law covers light trucks (under 15,000 lbs GVWR) and the nonresidential portions of motor homes (the chassis and engine). It does not cover trucks with a GVWR of 15,000 pounds or more, nor does it cover the living quarters or residential appliances within an RV.

Do I have to go through arbitration before suing the manufacturer?

If the manufacturer has an informal dispute settlement procedure that is certified by the Montana Department of Justice to comply with federal regulations, you must use that procedure before you can file a lawsuit under the state lemon law.

Can the manufacturer deduct money for the miles I drove the car?

Yes. If the manufacturer repurchases the vehicle, they are entitled to deduct a "reasonable allowance for use." This is calculated by multiplying the purchase price by the number of miles driven before the vehicle was returned, divided by 100,000.

Monica Patel, CP

Written by

Monica Patel, CP

Legal Research Editor

Monica leads legal research, tracking legislative changes across all 50 states and ensuring guides reflect current law with 9 years at a consumer rights nonprofit.

Carlos Medina, ASE Certified

✓ Reviewed for accuracy📅 Last updated August 5, 2026

Carlos Medina, ASE Certified · Vehicle Defect Researcher