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Montana · Article Updated May 26, 2026

Brake Defects Under the Montana Lemon Law

Brake failures under Montana's lemon law — safety-critical defects under the 4-attempt / 30-business-day presumption, with mountain-grade fade and mag-chloride corrosion as distinctive factors.

Brake defects are safety-critical under the Montana Lemon Law — a brake failure plainly impairs the safety of the vehicle. Montana reaches them under the 4-attempt / 30-business-day presumption (there is no one-attempt safety shortcut).

Common qualifying brake defects

  • Brake failure — loss of stopping ability.
  • Mountain-grade brake fade — overheating on long descents (a distinctive Montana factor).
  • Premature wear — rotors/pads failing far ahead of schedule.
  • ABS malfunctions — warning lights, intermittent loss of ABS.
  • Soft or sinking pedal — hydraulic or master-cylinder faults.
  • Brake-line corrosion — magnesium-chloride-de-icer-accelerated.
  • Brake-by-wire / regenerative-braking defects (EVs/hybrids).

The mountain-grade and mag-chloride factors

Montana’s long mountain descents (the Rockies, Continental Divide) stress brakes and can expose fade or overheating defects. And magnesium-chloride de-icer — the mountain-west winter road treatment — accelerates brake-line and caliper corrosion, a recurring Montana pattern.

No one-attempt rule — but strong on safety

Montana doesn’t reduce the threshold for a serious brake failure, so the 4-attempt / 30-business-day track applies. But a brake-safety defect makes the substantial-impairment element easy to show. Document the seriousness on every repair order.

Proving the case

  • Repair orders for the brake symptom across attempts.
  • Video of pedal faults, fade, or warning lights.
  • NHTSA complaints and TSBs for the platform.

Bottom line

Brake defects qualify under Montana’s presumption — and clearly impair safety — with mountain-grade fade and mag-chloride corrosion distinctive contributors. Document the seriousness and recurrence before the 18,000-mile cap. Get a free case review.

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