Qualifying Defects Under the New Hampshire Lemon Law
Which defects qualify under New Hampshire's lemon law — transmission, engine, brakes, electrical, steering, infotainment, EV — under the 3-attempt / 30-business-day presumption, with road-salt and cold-weather factors.
To qualify under the New Hampshire Lemon Law, a defect must substantially impair the use, market value, or safety of the vehicle, and resist repair across a reasonable number of attempts — 3 attempts or 30 business days out of service. New Hampshire’s road salt, long winters, and rural distances shape which defects recur and how fast the day count runs.
One track for all defects
Unlike states with a one-attempt safety shortcut, New Hampshire applies the same 3-attempt / 30-business-day presumption to every defect — including serious brake and steering failures. A safety defect still strengthens the case and supports a CPA theory, but the threshold math is the same.
Topics in this section
- Transmission
- Engine
- Brakes — road-salt corrosion driven
- Electrical — road-salt corrosion driven
- Steering & suspension
- Infotainment
- EV-specific
New Hampshire environmental stressors
- Heavy road salt — long winters and aggressive salting drive electrical, brake-line, and frame corrosion.
- Seacoast salt air — Portsmouth and the seacoast add coastal-corrosion exposure.
- Extreme cold — stresses EV range, batteries, and cold-start systems.
- White Mountains and rural distances — parts delays and back-orders run up the 30-business-day OOS count.
Substantial impairment is the test
A qualifying defect must substantially impair use, market value, or safety (RSA 357-D:2). Safety-related defects (brakes, steering, stalling) are the strongest cases — and dovetail with the CPA when the manufacturer knew of the defect.
Bottom line
New Hampshire’s 3-attempt / 30-business-day presumption applies to every defect that substantially impairs use, value, or safety — with road salt and cold weather as the signature drivers. Document carefully across same-dealer visits and present the full record at the Arbitration Board. Get a free case review.
Related
New Hampshire Lemon Law FAQ
Common questions about New Hampshire lemon-law claims — qualifying, the Arbitration Board, hiring a lawyer, cost, used vehicles, denied claims, repair shops, and deadlines.
Read → TopicNew Hampshire Lemon Law Cases by Manufacturer
How the New Hampshire Lemon Law and the Consumer Protection Act apply to specific manufacturers across the Manchester, Nashua, Concord, and seacoast markets.
Read → TopicThe Process: Filing a New Hampshire Lemon Law Claim
Step by step through a New Hampshire lemon-law claim — documented repair attempts, the final repair opportunity, the New Motor Vehicle Arbitration Board, and court action.
Read → TopicRemedies Under the New Hampshire Lemon Law
What you can recover in a New Hampshire lemon-law claim — consumer-elected refund or replacement, the 100,000-mile use offset, CPA treble damages, and mandatory attorney fees.
Read → TopicThe Law: New Hampshire Lemon Law and the Consumer Protection Act
The statutes behind a New Hampshire lemon-law claim — the Lemon Law (RSA 357-D), the New Motor Vehicle Arbitration Board, the Consumer Protection Act (RSA 358-A), and Magnuson-Moss.
Read → TopicVehicle Types Under the New Hampshire Lemon Law
How New Hampshire's lemon law applies across vehicle types — used, leased, EV, motorcycles, OHRVs, snowmobiles, RVs, and commercial — under the 11,000-lb threshold.
Read →Think you've got a lemon?
Compare your situation to your state's requirements — and connect with a vetted lemon-law attorney for a free case review.