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Colorado · Article Updated May 24, 2026

When Is a Car a Lemon in Colorado?

Colorado's Lemon Law thresholds — 3 attempts (2 for safety) or 24 cumulative business days OOS, plus certified-mail notice, within 2 years / 24,000 miles.

A vehicle qualifies as a “lemon” under Colorado’s C.R.S. § 42-10-103 when:

The thresholds

TestThreshold
Same general nonconformity, repair attempts3 or more
Same safety-related nonconformity, repair attempts2 or more
Cumulative business days out of service24 or more

PLUS:

  • Defect substantially impairs use or market value.
  • Within the 2-year / 24,000-mile Rights Period from delivery.
  • Certified-mail notice sent to manufacturer with final repair opportunity (manufacturer gets 10 business days to cure).

What counts as a “repair attempt”

  • Vehicle was at an authorized service facility.
  • Consumer reported the defect.
  • Repair order documents the visit.
  • “No problem found” visits count.
  • Different symptoms in the same visit can count separately.
  • Independent-mechanic visits don’t count.
  • Routine maintenance doesn’t count.

What “substantially impairs” means

Two-prong test (use OR market value) — typical examples that qualify:

  • Stalling.
  • Brake failure (particularly on mountain descents).
  • Steering failure.
  • Transmission slipping.
  • Engine fires.
  • Phantom braking.
  • HVAC system failure (critical in Colorado winter).

Business-day OOS counting

Colorado uses business days (Monday-Friday, excluding state and federal holidays). 24 business days roughly equals 34 calendar days — more consumer-favorable than the 30-calendar-day standard used by most states.

Bottom line

If you’ve had three repair attempts on the same defect (two for a safety-related defect) or 24+ cumulative business days out of service — and you’re within the 2-year / 24,000-mile window — you likely qualify. Get a free case review to confirm.

Related

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.