Michigan Repair-Attempt Presumption (MCL § 257.1403)

Michigan codifies its “reasonable number of repair attempts” thresholds at MCL § 257.1403. The framework requires four attempts for the same defect OR 30 cumulative days OOS, plus a certified-mail notice with a final repair opportunity under § 257.1403(1).

The two tests under § 257.1403

Test 1 — Four-attempt rule (same nonconformity)

The consumer meets the standard when:

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

Four attempts matches Illinois, New York, Texas, and North Carolina. One more than Pennsylvania and Ohio.

Test 2 — 30-day OOS rule

The consumer meets the standard when:

• The vehicle has been out of service for repair for a total of 30 or more days during the 1-year reporting window.

Michigan uses calendar days, not business days like North Carolina’s 20-business-day standard.

The 1-year reporting window applies to repair attempts

Importantly, all repair attempts that count toward the four-attempt rule must occur — and the defect must be reported — within one year of delivery under MCL § 257.1402. This is the most consumer-tight reporting window of any major lemon-law state.

The certified-mail notice requirement

Before invoking remedies, the consumer must serve written notice to the manufacturer by certified mail (or another method requiring return receipt) under MCL § 257.1403(1). The notice must:

• Identify the defect.
• Demand a final repair opportunity.
• Be sent to the manufacturer (not the dealer) at the address designated for Lemon Law notices.

The manufacturer then has a reasonable opportunity — typically 5 business days to designate a repair facility and an additional reasonable repair window — to attempt a final repair. If the defect persists, the consumer can proceed to BBB Auto Line (if mandatory under § 257.1407(1)) or court action.

Missing the certified-mail notice is the single most common procedural defect in Michigan Lemon Law cases. Courts and BBB Auto Line panels routinely dismiss claims that lack proper certified-mail notice.

Notice requirements

• Certified mail (or equivalent return-receipt method) — not regular mail, not email.
• To the manufacturer, not the dealer.
• Specific identification of the defect.
• Reference to MCL § 257.1403 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.

Cold-weather repair attempts

Michigan’s winter season can affect how repair attempts unfold:

• Cold-start failures may not reproduce at the dealer in warmer weather.
• HVAC defrost issues are seasonal but safety-critical in winter.
• EV battery range issues may be obvious in January but dismissed in July.

Document the seasonal context of each repair attempt — Michigan courts and the manufacturer’s repair representatives understand that some defects are weather-conditional.

Bottom line

Michigan’s § 257.1403 thresholds — four attempts for the same defect or 30 calendar days OOS — combined with the certified-mail notice and the 1-year reporting window under § 257.1402, are unforgiving procedurally. The 1-year window in particular is the tightest in the country and requires consumers to act early when defects manifest.

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