Used Vehicles Under Massachusetts Lemon Law (§ 7N¼)

Massachusetts is one of the few states with a separate Used Car Lemon Law — M.G.L. c. 90, § 7N¼ — providing a statutory warranty on used vehicles sold by dealers, with terms based on mileage at sale. Massachusetts joins New Jersey’s separate Used Car Lemon Law as one of the few states with this structure.

The sliding-scale warranty

§ 7N¼ provides a statutory warranty whose duration scales with mileage at sale:

Mileage at sale	Statutory warranty
Under 40,000 miles	90 days / 3,750 miles
40,000-79,999 miles	60 days / 2,500 miles
80,000-124,999 miles	30 days / 1,250 miles
125,000+ miles	No statutory warranty

The warranty covers defects that impair use, market value, or safety — the same substantial-impairment standard as the New Car Lemon Law.

Who’s covered

§ 7N¼ applies to:

• Used vehicles sold by Massachusetts dealers (not private-party sales).
• Vehicles purchased primarily for personal, family, or household use.

Private-party sales are not covered under § 7N¼ — but Chapter 93A may apply if there was misrepresentation.

What the dealer must do

If a defect manifests within the statutory warranty period:

• Repair the defect at no cost to the consumer.
• If repair attempts fail — three attempts or vehicle out of service 10+ business days — the consumer can demand refund or replacement.
• If the defect existed at time of sale but was not disclosed — strong c. 93A misrepresentation claim.

When the new-car Lemon Law also applies

A used vehicle can also qualify under § 7N½ (New Car Lemon Law) when:

• Within the 1-year / 15,000-mile Rights Period from original delivery (not the used purchase date).
• Within the 18-month Lemon Law action filing window from original delivery.
• Original manufacturer warranty still active.
• Defect substantially impairs use, market value, or safety.

In practice, used vehicles often have BOTH § 7N¼ (used-car statutory warranty) and § 7N½ (original new-car Lemon Law if still in window) coverage.

When WCPA-equivalent claims fill the gap

For used vehicles outside both § 7N¼ and § 7N½:

• Chapter 93A — 4 years from accrual; double/treble damages on willful/knowing or inadequate § 9(3) tender; mandatory § 9(4) fees. Strong for misrepresentation cases.
• Magnuson-Moss — 4 years from delivery; federal-court access D. Mass.

Common used-vehicle Chapter 93A theories

• Failure to disclose prior accident or flood damage.
• Odometer tampering.
• Hidden mechanical defects known to the dealer.
• Frame damage undisclosed.
• Salvage / branded title not disclosed.
• CARFAX discrepancies misrepresented.

CPO (Certified Pre-Owned) coverage

CPO vehicles typically have:

• Original manufacturer warranty (if still in window) — § 7N½ coverage.
• Extended CPO warranty.
• § 7N¼ statutory warranty.

CPO consumers get strong overlapping coverage.

A concrete example

You buy a 2024 vehicle as used in May 2026 with 28,000 miles:

• Original delivery: September 2024.
• § 7N¼ statutory warranty: 90 days / 3,750 miles (under 40K mileage tier).
• § 7N½ Rights Period: closed (past 1-year window from original delivery).
• § 7N½ filing window: closed (past 18-month window).
• Chapter 93A: 4 years from accrual.
• Magnuson-Moss: 4 years from delivery (through September 2028).

If defect manifests June 2026: § 7N¼ + c. 93A + Magnuson-Moss all available.

Bottom line

Massachusetts is unusually consumer-favorable on used cars — § 7N¼ provides statutory warranty independent of any other coverage, sliding by mileage tier. When combined with c. 93A (for misrepresentation), used-car consumers in Massachusetts have strong remedies. Get a free case review to evaluate which statutes apply.

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