Montana Lemon Law (2026): How to Qualify & Get a Refund

Montana's lemon law, codified at MCA 61-4-501 through 61-4-533, covers new motor vehicles purchased, titled, or leased in the state. A vehicle qualifies as a lemon when the same defect persists after four repair attempts or the vehicle sits out of service for 30 or more cumulative business days within the 2-year or 18,000-mile warranty period. The remedy is replacement or a full refund minus a mileage-based usage deduction, with the choice belonging to the manufacturer.

What Is the Montana Lemon Law?

Montana's lemon law, formally known as the New Motor Vehicle Warranties Act, protects consumers who purchase or lease a new vehicle that turns out to have a serious, unfixable defect. The law is codified in MCA 61-4-501 through 61-4-533 and establishes specific rules that manufacturers must follow when a new vehicle fails to meet warranty standards.

The core idea is straightforward. If a manufacturer or its authorized dealer cannot fix a substantial defect after a reasonable number of attempts, the manufacturer is required to either replace the vehicle or refund the consumer's money. The Montana Department of Justice Office of Consumer Protection oversees enforcement and provides resources for consumers who believe they have a lemon.

Montana's lemon law works alongside other consumer protection laws, including the federal Magnuson-Moss Warranty Act and the Montana Uniform Commercial Code (UCC). These additional laws can provide extra avenues of relief, particularly for used vehicles or situations that fall outside the state lemon law's coverage.

What Vehicles Does Montana's Lemon Law Cover?

Under MCA 61-4-501, the law defines "motor vehicle" as a self-propelled vehicle designed primarily to transport persons or property on public highways that is sold or registered in Montana. This definition also includes the nonresidential portion of motor homes. The statute does not name motorcycles specifically, but it does not exclude them either, and the Montana Department of Justice's own consumer guidance confirms that motorcycles are covered by the lemon law.

Covered Vehicle Types

Who Qualifies as a "Consumer"?

MCA 61-4-501 defines a "consumer" as the purchaser or lessee of a new motor vehicle used for personal, family, or household purposes. The term also extends to any person who receives the vehicle by transfer during the warranty period, as long as the vehicle is used for the same personal purposes.

To qualify, the consumer must not have caused the defect through abuse, neglect, or unauthorized modifications. Vehicles purchased for resale or commercial lease purposes are not covered.

The Warranty Period

Montana's lemon law protections apply during a specific warranty period defined by statute. Under MCA 61-4-501, the warranty period ends at whichever of the following comes first:

• 2 years after the date of original delivery to the consumer, or
• 18,000 miles of operation

All repair attempts and out-of-service days must occur within this window for the lemon law presumption to apply. The statute does include one important exception: the warranty period is extended for any time that repair services are unavailable due to war, invasion, strike, fire, flood, or other natural disaster.

Once a consumer provides written notice of a defect during the warranty period, the manufacturer's obligation to repair continues even if the warranty period expires while repairs are ongoing. This provision, found in MCA 61-4-502, prevents manufacturers from running out the clock on warranty repairs.

What Counts as a "Substantial Nonconformity"?

Not every vehicle problem triggers lemon law protections. Under MCA 61-4-503, the defect or condition must "substantially impair the use and market value or safety" of the vehicle. This is a legal standard that looks at how seriously the problem affects the vehicle's function, resale value, or the safety of its occupants.

Examples of Substantial Nonconformities

• Recurring engine or transmission failures
• Persistent brake system malfunctions
• Steering defects that affect vehicle control
• Electrical system problems that disable key functions
• Chronic starting or stalling issues
• Safety system failures (airbags, stability control, anti-lock brakes)
• Persistent fluid leaks from critical systems

Examples of Issues That Likely Do Not Qualify

• Minor cosmetic imperfections
• Slight rattles or squeaks that do not affect function
• Normal wear-and-tear items
• Issues caused by the consumer's own modifications

The distinction between a qualifying defect and a minor annoyance often becomes the central dispute in lemon law cases. Keeping thorough documentation of how the defect affects daily use, safety, and vehicle value strengthens a consumer's claim.

The Lemon Law Presumption: When Does It Apply?

Under MCA 61-4-504, Montana law creates a rebuttable presumption that a reasonable number of repair attempts have been made when either of these conditions is met during the warranty period:

Once the presumption applies, the burden shifts to the manufacturer to prove that either the defect has been fixed, the defect does not substantially impair the vehicle, or the consumer caused the problem. If the manufacturer cannot overcome the presumption, it must provide a remedy.

This presumption is a powerful tool for consumers because it eliminates the need to prove that the manufacturer had "enough" chances to fix the vehicle. The law draws that line automatically at four attempts or 30 business days.

Written Notice Requirement

Montana's lemon law includes a mandatory written notice requirement that consumers must follow. Under MCA 61-4-502, the consumer must notify the manufacturer or its agent in writing during the warranty period that the vehicle does not conform to the express warranty.

The manufacturer is required to clearly disclose the notice requirement in the warranty or owner's manual. This disclosure must include the name and address where the consumer should send the notification.

What to Include in Your Written Notice

• Your full name and contact information
• Vehicle identification number (VIN), make, model, and year
• A clear description of the nonconformity or defect
• A summary of all previous repair attempts, including dates and outcomes
• A request for the manufacturer to correct the problem or provide a remedy

Sending the notice by certified mail with return receipt requested creates a paper trail that proves the manufacturer received your communication. This documentation can be critical if the claim proceeds to arbitration or litigation.

Consumer Remedies: Replacement or Refund

When a manufacturer or its authorized dealer cannot fix a substantial nonconformity after a reasonable number of attempts during the warranty period, MCA 61-4-503 requires the manufacturer to act. Under the statute, the manufacturer decides which remedy to provide: it may replace the vehicle or accept the return in exchange for a full refund.

Replacement Vehicle

One option available to the manufacturer is replacement. If the manufacturer elects replacement, it must provide:

• A new motor vehicle of the same model and style and of equal value
• If replacement with the same model is impossible for reasons of lack of availability, a motor vehicle of comparable market value

The same model and style replacement must be a new vehicle, not a used or refurbished one. Section 61-4-503(1) attaches no consumer-acceptance condition to the comparable-value substitute; the "acceptable to the consumer" standard comes from MCA 61-4-519(2), which governs the remedies a Department of Justice arbitrator may award. Collateral charges such as sales tax, license fees, and registration fees are attached by statute to the refund alternative in 61-4-503(2), not to the replacement remedy.

Full Refund

The manufacturer may instead accept return of the vehicle and issue a refund. Under MCA 61-4-501 and 61-4-503, the refund must include:

• Full purchase price of the vehicle
• Collateral charges: sales tax, property tax, license fees, registration fees, and any fees paid in lieu of tax
• Incidental damages: as defined in MCA 30-2-715 (Montana's UCC provision covering incidental and consequential damages)

The Usage Deduction

The refund is reduced by a reasonable allowance for the consumer's use of the vehicle before it was returned. Montana law sets a specific formula for calculating this deduction:

Usage Deduction = (Total Contract Price x Miles Driven Before Return) / 100,000

For example, if the total contract price was $35,000 and the consumer drove 5,000 miles before the manufacturer accepted the return, the usage deduction would be:

$35,000 x 5,000 / 100,000 = $1,750

The refund minus the usage deduction must be distributed between the consumer and any lienholder (such as a bank or credit union) in proportion to their respective interests in the vehicle.

Dispute Resolution and Arbitration

Montana's lemon law includes a structured dispute resolution process. If a consumer believes they are entitled to a remedy and the manufacturer disagrees, the consumer must first use a state-certified dispute settlement program before filing a lawsuit.

Manufacturer Dispute Settlement Programs

Under MCA 61-4-507, if a manufacturer has established an informal dispute settlement procedure that the Montana Department of Justice has certified as substantially complying with 16 CFR Part 703 (the federal rules for informal dispute mechanisms), the consumer must exhaust that procedure before pursuing remedies under MCA 61-4-503. A certified program carries its own performance clock: MCA 61-4-511(2)(b) bars a manufacturer from delaying an awarded remedy more than 10 days after a decision, except that the manufacturer may take up to 30 days following the date of decision to replace the vehicle or make the refund provided in 61-4-503.

State Arbitration Program

Montana operates its own arbitration program, administered by the Montana Department of Justice. Under MCA 61-4-515, a consumer may bring a grievance before a department arbitrator only if the manufacturer has not established a dispute settlement procedure certified under MCA 61-4-511. Being dissatisfied with the outcome of a certified manufacturer program does not by itself open the state program. The narrow exception is MCA 61-4-520, which allows arbitration de novo before a department arbitrator for a consumer injured by the operation of a procedure that did not conform to the requirements established under 61-4-511 and 16 CFR Part 703. Key features of the state program include:

• Consumer filing fee: $100 at the time of filing; the manufacturer pays $750 if the state arbitration procedure is used
• A single arbitrator: Under MCA 61-4-516, the arbitrator is chosen by the department from a list it maintains of persons willing to serve. The parties do not each appoint a panel member
• 60-day decision deadline: The arbitrator must render a decision within 60 days of the Department of Justice accepting the complaint
• Location: All arbitration takes place in Montana at a location reasonably convenient to the consumer
• Compliance timeline: MCA 61-4-519(3) requires the decision itself to specify a date for performance and completion of all awarded remedies, and the department contacts the prevailing party within 10 working days after that date to determine whether performance occurred. The deadline is set case by case in the award, not by a uniform statutory period

Under MCA 61-4-518, the Department of Justice investigates, gathers, and organizes all information necessary for a fair and timely decision in each dispute. It may issue subpoenas to obtain witness testimony and can forward technical questions to an independent automotive expert certified by the National Institute for Automotive Service Excellence.

Filing a Complaint

Consumers can contact the Montana Department of Justice Office of Consumer Protection to initiate a lemon law complaint. The office investigates complaints and can help facilitate resolution between consumers and manufacturers.

Manufacturer Defenses

MCA 61-4-506(3) sets out the statutory affirmative defenses: that the alleged nonconformity does not substantially impair the use, market value, or safety of the vehicle, or that the nonconformity resulted from the consumer's abuse, neglect, or unauthorized modification or alteration. A manufacturer may also argue that the consumer never satisfied the written notice prerequisite, which comes from MCA 61-4-502 rather than from 61-4-506.

Dealer Liability Protection

Under MCA 61-4-505, Montana's lemon law does not impose liability on dealers or create a cause of action by a consumer against a dealer. Lemon law claims run against the manufacturer, not the selling dealer. However, dealers remain subject to other consumer protection laws and UCC warranty obligations.

How to File a Montana Lemon Law Claim Step by Step

Filing a successful lemon law claim in Montana requires careful preparation and documentation at every stage.

Step 1: Document Everything From Day One

Start keeping records the moment a problem appears. Maintain organized copies of:

• All repair orders, invoices, and work summaries
• Dates and duration of each repair visit
• Written descriptions of the symptoms you experienced
• All correspondence with the dealer and manufacturer
• Receipts for rental cars, towing, or other expenses caused by the defect
• Photos or videos of the defect when possible

Step 2: Send Written Notice to the Manufacturer

During the warranty period, send a formal written notice to the manufacturer at the address listed in the warranty or owner's manual. Use certified mail with return receipt requested. Clearly describe the defect and your repair history.

Step 3: Allow the Manufacturer to Attempt Repairs

Give the manufacturer or its authorized dealer a genuine opportunity to fix the problem. Track each repair attempt carefully, noting the date you dropped off the vehicle, the date you picked it up, and whether the problem was resolved.

Step 4: Determine Whether the Presumption Applies

After four repair attempts for the same problem or 30 cumulative business days out of service, the lemon law presumption kicks in. Verify that all attempts occurred within the warranty period (2 years or 18,000 miles).

Step 5: Use the Dispute Settlement Process

If the manufacturer has a certified dispute settlement program, submit your complaint through that program first. If no certified program exists, contact the Montana Department of Justice Office of Consumer Protection to file a request for state arbitration.

Step 6: Pursue Legal Action if Necessary

If arbitration does not resolve your claim, you retain the right to file a lawsuit. Montana's lemon law does not limit other legal remedies available to consumers under the UCC or other laws.

Federal Magnuson-Moss Warranty Act

The federal Magnuson-Moss Warranty Act (15 U.S.C. 2301 et seq.) serves as an important backstop for Montana consumers. This federal law applies to any vehicle sold with a written warranty and allows consumers to pursue remedies in federal court when a manufacturer fails to honor warranty obligations. Magnuson-Moss is particularly valuable because it allows recovery of attorney fees if the consumer prevails, making it economically feasible to challenge manufacturers over lower-value claims. Unlike Montana's state lemon law, Magnuson-Moss applies to both new and used vehicles as long as a written warranty or service contract accompanies the sale.

Used Vehicle Protections in Montana

Montana's lemon law primarily covers new vehicles during the warranty period. However, several other laws provide protections for used vehicle buyers.

Used Vehicles That May Still Qualify

• Transferred warranty: A person who receives a vehicle by transfer during the original warranty period may qualify as a "consumer" under MCA 61-4-501
• Remaining warranty coverage: If the vehicle is still within the 2-year or 18,000-mile warranty window, the new owner may have lemon law rights

Alternative Legal Protections for Used Vehicles

Tips for Strengthening Your Montana Lemon Law Claim

Consumers who follow these practices position themselves for the best possible outcome.

Keep a vehicle repair log. Record every symptom, repair visit, and conversation in a dedicated notebook or digital file. Include dates, mileage readings, and the names of service advisors or technicians.

Do not skip scheduled maintenance. One of the most common manufacturer defenses is consumer neglect. Following the maintenance schedule in your owner's manual and keeping all receipts removes this defense.

Report problems promptly. Waiting too long to report a defect can weaken your claim. Notify the dealer and manufacturer in writing as soon as you notice a recurring issue.

Get independent inspections. If the dealer claims the problem is fixed but it persists, consider having an independent mechanic document the continuing defect. This third-party evidence can be persuasive in arbitration.

Understand the timeline. The 2-year and 18,000-mile limits are firm. Make sure all required repair attempts and written notice occur within this window.

More Montana Laws

• Montana Car Accident Laws

Frequently Asked Questions

How many repair attempts are required under Montana's lemon law?

Montana law creates a presumption that a reasonable number of attempts have been made after four or more repair attempts for the same nonconformity, or after the vehicle has been out of service for 30 or more cumulative business days. These must occur during the warranty period, which ends 2 years after delivery or at 18,000 miles, whichever comes first.

Does Montana's lemon law cover motorcycles?

Yes. MCA 61-4-501's definition of motor vehicle does not name motorcycles specifically, but it does not exclude them either. The Montana Department of Justice's official lemon law guidance confirms that motorcycles are covered. Motorcycles that are purchased, titled, or leased in Montana and used for personal purposes are eligible for lemon law protection during the warranty period.

Do I have to send written notice to the manufacturer before filing a lemon law claim?

Yes. MCA 61-4-502 requires the consumer to provide written notice to the manufacturer or its agent during the warranty period. The manufacturer must disclose the notice requirement and the correct mailing address in the warranty or owner's manual. Sending notice by certified mail with return receipt is strongly recommended.

How is the usage deduction calculated on a Montana lemon law refund?

The usage deduction equals the total contract price multiplied by the number of miles driven before the manufacturer accepts the return, divided by 100,000. For example, on a $30,000 vehicle driven 6,000 miles, the deduction would be $1,800 ($30,000 x 6,000 / 100,000).

Who decides between a replacement vehicle and a refund?

Under MCA 61-4-503, the manufacturer decides which remedy to provide. The manufacturer may replace the vehicle with a comparable new one or accept return of the vehicle and issue a refund. Consumers should be prepared for the manufacturer to exercise this choice, though negotiating for a preferred remedy is common in practice.

Can I file a lawsuit without going through arbitration first?

It depends. Under MCA 61-4-507, if the manufacturer has a dispute settlement procedure certified by the Montana Department of Justice as complying with federal regulations (16 CFR Part 703), you must use that procedure first. If no certified program exists, you may pursue the state arbitration program administered by the Montana Department of Justice. Contact the Montana Department of Justice Office of Consumer Protection for guidance on your specific situation.