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Montana · Article Updated May 26, 2026

RVs and Motor Homes Under the Montana Lemon Law

How Montana's lemon law treats motor homes and RVs — the self-propelled chassis vs. the coach, the 15,000-lb truck cap, the personal-use rule, and UTPA/Magnuson-Moss alternatives.

Montana’s treatment of motor homes depends on type, weight, and use. The Montana Lemon Law covers a new motor vehicle designed primarily to carry passengers on public highways for personal/family/household use, while excluding trucks of 15,000 lbs GVW or more. The self-propelled chassis of a personal-use motor home under that weight may be covered; the coach and trailers fall outside.

What may be covered: the chassis

The self-propelled chassis and drivetrain of a personal-use motor home under 15,000 lbs may fall within the covered-vehicle definition. Chassis defects that may qualify:

  • Engine defects — stalling, overheating (worse on mountain grades).
  • Transmission defects.
  • Brake or steering failures (safety-critical; substantial impairment is easy to show).
  • Chassis electrical — mag-chloride-corrosion relevant.

What’s not covered

  • The coach/house portion — slide-outs, water intrusion, appliances, build quality.
  • Towable trailers — no motor.
  • Larger motor homes over 15,000 lbs GVW.

What fills the gap

  • Magnuson-Moss — federal warranty claims on chassis and coach-component warranties; § 2310(d)(2) fees; 4-year runway.
  • Montana CPA — for dealer misrepresentation, with a discretionary treble and fees.
  • Implied warranty of merchantability (§ 30-2-314).

Bottom line

A personal-use motor-home chassis under 15,000 lbs may be covered by Montana’s lemon law; the coach, trailers, and larger units rely on Magnuson-Moss and the CPA. Get a free case review to map the right statute to the defect.

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