Colorado Repair-Attempt Presumption (C.R.S. § 42-10-103)

Colorado codifies its “reasonable number of repair attempts” thresholds at C.R.S. § 42-10-103, as amended by SB24-192 (effective August 7, 2024). The 24-business-day OOS rule is distinctive — Colorado joins Massachusetts (15 business days) and North Carolina (20 business days) in using business-day counting rather than calendar-day counting.

The tests under § 42-10-103

Test 1 — Three-attempt rule (same nonconformity)

The consumer meets the standard when:

• The same nonconformity has been the subject of three or more repair attempts; AND
• The defect continues to exist; AND
• The consumer has provided certified-mail notice and the final repair opportunity.

SB24-192 lowered the general threshold from four attempts to three, matching New Jersey, Georgia, Ohio, and Pennsylvania.

Test 2 — Two-attempt rule (safety-related nonconformity)

For a safety-related nonconformity, the consumer meets the standard after two or more repair attempts (with the defect continuing to exist and notice provided). SB24-192 added this lower safety threshold.

Test 3 — 24-business-day cumulative OOS rule

The consumer meets the standard when:

• The vehicle has been out of service for repair for a total of 24 or more business days during the 2-year / 24,000-mile Rights Period.

Business-day counting — weekends and state/federal holidays don’t count. 24 business days roughly equals 34 calendar days — more consumer-favorable than the 30-calendar-day standard used by most states.

A vehicle held from Monday morning through the following Monday morning would count as 5 business days, not 7 calendar days.

Lower threshold for safety-related defects

SB24-192 created a two-attempt threshold for safety-related nonconformities, bringing Colorado in line with Virginia, Georgia, and Washington, which also accelerate the presumption for serious safety defects.

The certified-mail notice and 10-business-day cure

Before invoking remedies, the consumer must serve written notice by certified mail to the manufacturer under C.R.S. § 42-10-104. SB24-192 gives the manufacturer 10 business days after that notice to cure the nonconformity. The notice should:

• Identify the defect.
• Demand a final repair opportunity.
• Be sent to the manufacturer (not the dealer) at the address designated for Lemon Law notices.
• Be sent by certified mail with return receipt (required).

Notice requirements

• Written — certified mail with return receipt is best practice.
• To the manufacturer, not the dealer.
• Specific identification of the defect.
• Reference to C.R.S. § 42-10-103 is good practice.

What counts as a “repair attempt”

A repair attempt requires:

• The vehicle was presented to an authorized service facility.
• The consumer reported the defect.
• A repair order documents the visit.

Importantly:

• “No problem found” visits count.
• Different symptoms during the same visit can count separately.
• Routine maintenance doesn’t count.
• Independent-mechanic visits don’t count.

The 2-year / 24,000-mile window

Repair attempts must occur within the 2-year / 24,000-mile window from original delivery, whichever first.

Mountain altitude factors

Colorado’s mountain altitude can accelerate defect manifestation. Defects involving:

• Turbocharger systems — altitude operation stresses turbo internals.
• Engine cooling — sustained low-density-air operation.
• Brake systems — heavy descent stress.
• Diesel emissions — DEF crystallization at altitude.

…are recognized environmental stressors and may accelerate threshold-triggering events.

Bottom line

Colorado’s § 42-10-103 thresholds (post-SB24-192) — three attempts on the same nonconformity (two for safety-related), OR 24 business days cumulative OOS — combined with certified-mail notice and the 10-business-day cure, provide consumer-friendly access to Lemon Law remedies. The business-day counting is meaningfully more consumer-favorable than calendar-day jurisdictions.

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