When Is a Car a Lemon in Montana?
Montana's thresholds — 4 same-defect repairs or 30 business days out of service, within the 2-year/18,000-mile warranty period, after written notice.
A vehicle qualifies as a “lemon” under Montana’s Lemon Law when a covered defect substantially impairs its use, market value, or safety and the manufacturer can’t fix it after a reasonable number of attempts.
The thresholds
| Test | Threshold |
|---|---|
| Same nonconformity, repair attempts | 4 or more |
| Cumulative business days out of service | 30 or more |
PLUS:
- Within the warranty period — 2 years or 18,000 miles, whichever first.
- Written notice to the manufacturer (§ 61-4-502(3)).
Watch the 18,000-mile cap
Montana’s warranty period ends at the earlier of two years or 18,000 miles — and Montana drivers cover long distances, so the mileage cap often closes the window first. Build the record and give notice early. See repair-attempt presumption.
No one-attempt safety rule
Unlike Maine and Idaho, Montana has no reduced threshold for serious safety defects — even a brake or steering failure must reach 4 attempts or 30 business days. A safety defect still strengthens the case.
What counts as a repair attempt
- Vehicle was at the manufacturer or an authorized dealer, with a repair order.
- You reported the nonconformity (“no problem found” counts).
- The same nonconformity persists.
- Independent shops and routine maintenance don’t count.
What’s covered
A personal/family/household vehicle under 15,000 lbs — motorcycles likely fall outside the Act (not named; confirm). See vehicle types.
Bottom line
Four same-defect repairs or 30 business days out of service — within the 2-year/18,000-mile period, after written notice — and you likely qualify. Act before the 18,000-mile cap closes the window. Get a free case review.
Related
Do I Need a Lawyer for a Montana Lemon Law Claim?
Whether you need an attorney for a Montana lemon-law claim — arbitration allows self-representation, but the CPA and Magnuson-Moss (which carry the fees) often warrant counsel.
Read → ArticleHow Long Do I Have to File a Montana Lemon Law Claim?
Montana's deadlines — the 2-year/18,000-mile warranty period (and the mileage trap), in-state arbitration, and the CPA and Magnuson-Moss clocks.
Read → ArticleWhat If the Manufacturer Denied My Montana Lemon Law Claim?
What to do when a manufacturer denies a Montana lemon-law claim — common defenses, in-state arbitration and de novo, and the CPA per se violation.
Read → ArticleHow Much Does a Montana Lemon Law Claim Cost?
What a Montana lemon-law claim costs — low-cost arbitration, and fees recovered through the CPA (capped) and Magnuson-Moss since the lemon law has none.
Read → ArticleAre Used Vehicles Covered Under the Montana Lemon Law?
How used vehicles are covered in Montana — the warranty-period route (watch the 18,000-mile cap), plus the CPA and Magnuson-Moss for misrepresentation and concealed corrosion.
Read → ArticleWhich Repair Shop Should I Use for a Montana Lemon Law Claim?
Why you must use an authorized dealer for repairs to count toward Montana's lemon-law presumption — and how the 18,000-mile cap and long distances interact.
Read →Think you've got a lemon?
Compare your situation to your state's requirements — and connect with a vetted lemon-law attorney for a free case review.