Qualifying Defects Under Michigan Lemon Law

A defect qualifies under the Michigan Lemon Law when it is a “defect or condition” that the manufacturer cannot repair after a reasonable number of attempts AND that “substantially impairs the use or value” of the vehicle to the consumer under MCL § 257.1401(g).

Topics in this section

• Transmission defects
• Engine defects
• Brake-system defects
• Electrical and software defects
• Steering and suspension defects
• Infotainment defects
• EV-specific defects

The substantial-impairment test in Michigan

MCL § 257.1401(g) defines a “defect” as one that substantially impairs the use or value of the vehicle. Note: Michigan uses a two-prong test (use OR value) — slightly narrower than Georgia or Ohio (which include safety as an independent third prong). Safety considerations factor into Michigan’s “use” prong because an unsafe vehicle cannot be reasonably used.

What’s substantial vs. trivial

• Transmission that shifts hard — qualifies.
• Engine that stalls — qualifies.
• Brake-pedal feel that varies — qualifies (safety as use-impairment).
• Power-window switch — typically doesn’t qualify alone.

What’s NOT a qualifying defect

• Damage from accidents.
• Damage from unauthorized modifications.
• Normal wear.
• Neglect or misuse.
• Cosmetic flaws.
• Defects caused by the consumer.

How qualifying defects interact with repair-attempt counts

A qualifying defect alone isn’t enough — the consumer must meet § 257.1403 thresholds: four attempts for the same nonconformity OR 30 cumulative days OOS, plus the certified-mail notice and final repair opportunity.

The 1-year reporting requirement applies to defects too

The defect must be reported within one year of delivery under MCL § 257.1402. A defect that first manifests at month 13 cannot be the basis for a Michigan Lemon Law claim — only Magnuson-Moss (4 years) and possibly MCPA remain.

Cold-weather defect patterns

Michigan’s winters surface defects that warmer states don’t see as commonly:

• Cold-start engine issues (carbon buildup, hard starts).
• Battery and starter failures in EVs.
• HVAC failures (no heat).
• Door handle / lock freezing.
• Range loss in EVs during cold months.
• All-wheel-drive engagement issues.

Cold-weather defects can substantially impair use during the 4-5 month Michigan winter even if they perform acceptably in summer.

What court considers

• Clean documentation.
• Consistent symptoms across visits.
• Defect persistence after the final repair opportunity.
• Aligned with documented TSBs or recalls.
• Whether reporting was within 1 year of delivery.

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The Michigan Lemon Law Process

Step-by-step: how a Michigan lemon-law case moves through repair attempts, certified-mail notice, mandatory informal dispute settlement procedure, court action, and settlement.

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Michigan Lemon Law Remedies

What you can recover under Michigan's lemon-law framework — refund, replacement, cash-and-keep, narrowed MCPA damages, and § 257.1407(2) discretionary attorney-fee recovery plus Magnuson-Moss mandatory fees.

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The Law: Michigan Lemon Law, MCPA, and Magnuson-Moss

The statutes behind a Michigan lemon-law claim — the New Motor Vehicle Warranty Act (MCL § 257.1401), the narrowed Michigan Consumer Protection Act (MCL § 445.901), federal Magnuson-Moss, and timing rules.

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Vehicle Types Covered by Michigan Lemon Law

How Michigan's Lemon Law applies to used cars, leases, EVs, motorcycles, RVs, and commercial vehicles.

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