Commercial Vehicles Under Massachusetts Lemon Law

Massachusetts’s Lemon Law applies to vehicles up to 10,000 lbs GVWR under § 7N½ — the standard threshold used by most states.

What’s covered

• Personal-use vehicles up to 10,000 lbs GVWR.
• Light-duty pickups (F-150, Silverado 1500, Ram 1500, Tundra).

What’s NOT covered

• Primarily commercial-use vehicles even within weight limits.
• Vehicles over 10,000 lbs GVWR (most F-250/F-350, Silverado 2500/3500, Ram 2500/3500).
• Heavy-duty commercial trucks.
• Cargo vans over 10,000 lbs (most Sprinter / Transit / ProMaster configurations).

For excluded vehicles, Chapter 93A and Magnuson-Moss provide alternative civil-court remedies — both with full attorney-fee protections.

The “primarily for personal use” requirement

§ 7N½ requires the vehicle to be for “personal, family, or household use.” Commercial use disqualifies. Tests for use:

• Vehicle registration — passenger plate vs. commercial plate.
• Insurance type — personal vs. commercial policy.
• Use pattern — daily driving vs. business operations.
• Mileage allocation — personal vs. business.

A vehicle used 50%+ for personal use typically qualifies; primarily-commercial use does not.

Comparison to broader-coverage states

Massachusetts’s 10,000-lb threshold is the standard most states use:

• Washington’s 19,000-lb threshold — broader.
• Most states (including MA): 10,000 lbs.

This means heavy-duty pickups (F-250/F-350, Silverado 2500/3500, Ram 2500/3500) are typically EXCLUDED from § 7N½ — unlike Washington where they’re typically covered.

Common excluded-vehicle defects

For heavy-duty pickups and commercial vehicles outside § 7N½:

• Diesel emissions system failures (DEF, DPF, SCR).
• Heavy-duty transmission failures.
• Fuel pump failures (HPFP catastrophic failure pattern).
• DEF heater / sensor failures.
• Tow-package electrical failures.

These defects can be pursued under c. 93A and Magnuson-Moss — both with strong fee provisions.

Chapter 93A and Magnuson-Moss as primary tools

For vehicles outside the 10,000-lb threshold:

• Chapter 93A — 4-year limitations; double/treble damages on willful/knowing or inadequate § 9(3) tender; mandatory § 9(4) fees.
• Magnuson-Moss — federal-court access D. Mass.

Bottom line

Massachusetts uses the standard 10,000-lb GVWR threshold — narrower than Washington’s 19,000-lb coverage. Heavy-duty pickups and commercial vehicles typically fall outside § 7N½ but remain covered by Chapter 93A and Magnuson-Moss — both providing strong civil-court remedies with mandatory fee provisions.

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