EV-Specific Defects in Michigan Lemon Law Cases

Michigan is the historical center of the American auto industry and an increasingly significant EV market — GM (Ultium platform), Ford (F-150 Lightning, Mustang Mach-E), and Stellantis are pivoting major investment into EV production in Michigan. EV-specific defects qualify under the substantial-impairment test under § 257.1401(g) — and Michigan’s cold winters intensify EV-specific defect patterns.

Battery and range issues

• Premature range loss below warranty floor.
• Cold-weather range loss — Michigan winters routinely produce 30-50% range reduction. Manufacturers may dispute this is a “defect” if disclosed; consumers should pull the manufacturer’s range-disclosure documentation.
• BMS defects — inaccurate range, “bricking,” charging failures.
• Phantom drain — particularly severe in cold weather.

Charging system failures

• DC fast-charging issues.
• AC home charging failures.
• Charging-port hardware. Michigan road salt and freezing temperatures affect charging-port reliability.
• Cold-weather charging speed reduction — significant in Michigan winters.

Drive-unit issues

Whining, vibration, reduced power. Drive-unit failures that cause sudden loss of motive power qualify under § 257.1401(g).

Cold-weather EV-specific patterns

Michigan EV cases include defect categories rare elsewhere:

• Heat-pump failures affecting cabin heat (severe in MI winters).
• Battery preconditioning failures causing range loss.
• One-pedal drive disengagement in icy conditions.
• Frozen 12V auxiliary batteries preventing high-voltage system startup.
• Charging-port freeze-up.

High-voltage system safety issues

Safety-critical → strong Magnuson-Moss federal-court exposure.

Regenerative braking issues

See brake-system article.

Software-update repair attempts

Each OTA targeting a specific defect counts as a repair attempt.

What manufacturers typically argue

• “Battery degradation is normal.”
• “Latest software fixed it.”
• “OTAs aren’t ‘repair attempts.’”
• “Cold-weather range loss is disclosed.”

Michigan EV manufacturing context

• GM Factory ZERO (Detroit-Hamtramck) — Hummer EV, Cruise Origin assembly.
• GM Orion Assembly — being converted for EV production.
• Ford Rouge Electric Vehicle Center — F-150 Lightning.
• Ford BlueOval Battery Park Michigan (Marshall) — under construction.
• Stellantis — major EV investment announcements.

In-state production concentrates federal Magnuson-Moss EV cases in E.D. or W.D. Mich.

What you should do

1. Report defect within 1 year of delivery.
2. Document each repair attempt — dealer visits AND OTA updates.
3. Screenshot range estimates over time, including temperature context.
4. Save charging-session data.
5. Send certified-mail notice.
6. Get a Michigan lemon-law attorney with EV experience.

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