New Hampshire Lemon Law: What Qualifies and How to Get a Refund or Replacement (2026)

New Hampshire’s lemon law, codified in RSA § 357-D, provides one of the most generous protection periods in the United States. New vehicle and demo car buyers have up to 3 years or 36,000 miles to file a lemon law claim—substantially longer than most other states. If your vehicle has a serious defect that substantially impairs its use, value, or safety, and that defect cannot be repaired after reasonable attempts, New Hampshire law entitles you to a full refund or replacement. The law does not require mandatory arbitration before filing a claim, allowing you to proceed directly to the courts if needed.

This guide explains New Hampshire’s lemon law protections, documentation requirements, and the steps to pursue a refund or replacement.

New Hampshire Lemon Law: Key Facts

What Qualifies as a Lemon in New Hampshire

A vehicle qualifies as a lemon in New Hampshire if:

• It has a defect that substantially impairs its use, value, or safety
• The defect is covered under the manufacturer’s warranty
• The defect occurs within 3 years of purchase or before 36,000 miles (whichever comes first)
• The defect cannot be repaired after a reasonable number of attempts
• The defect is not caused by abuse, misuse, or unauthorized modification

“Reasonable attempts” means:

• 3 or more repair attempts for the same defect, OR
• The vehicle is out of service for 30 cumulative days for warranty repairs

New Hampshire’s 3-year/36,000-mile protection period is among the longest in the nation, giving buyers an extended window to identify and address manufacturing defects. The law covers mechanical failures, electrical problems, transmission issues, safety defects, and persistent design flaws.

How to Document Your Lemon Claim

Build a comprehensive case with thorough documentation:

• Service records: Collect copies of all repair orders, work tickets, and invoices from the dealership
• Warranty documentation: Keep your purchase agreement and manufacturer’s warranty booklet
• Defect timeline: Document when the problem first appeared and describe the exact symptoms
• Repair history: For each service visit, record the date, mileage, description of repairs attempted, and whether the defect was resolved
• Out-of-service days: Track the total number of calendar days the vehicle was at the dealer for repairs
• Communication records: Save all emails, letters, and text messages to the dealer or manufacturer
• Phone call logs: Document each phone call (date, time, person, summary)
• Photos and videos: Capture the defect if visible (warning lights, mechanical problems, etc.)
• Purchase documentation: Keep the bill of sale, title, and registration

How to File a Lemon Law Claim in New Hampshire

Step 1 — Send Written Notice to the Manufacturer

Send formal written notice to the vehicle manufacturer. Your notice should include:

• Your full name, address, and contact information
• Vehicle identification number (VIN), year, make, and model
• Date of purchase and current mileage
• Detailed description of the defect
• Copies of all service records and repair dates
• Number of repair attempts and days out of service
• Clear statement that repairs have been unsuccessful
• Request for refund or replacement
• Deadline for response (typically 10 business days)

Send via certified mail with return receipt requested.

Step 2 — Manufacturer Response and Communication

After receiving your notice, the manufacturer may:

• Offer to make a final repair attempt
• Offer a refund or replacement
• Refuse the claim

New Hampshire does not require mandatory arbitration, so you are not obligated to accept additional repair attempts or participate in arbitration if proposed. You have the freedom to pursue litigation directly if the manufacturer refuses your claim.

Step 3 — File a Lawsuit

If the manufacturer refuses your claim or repairs continue to fail:

• File suit in District Court or Superior Court depending on the claim amount
• You can recover the full purchase price, sales tax, registration fees, and attorney fees if you prevail
• Additional damages may be available in cases involving safety defects or bad faith conduct

Real Situations in New Hampshire

Manchester: A buyer purchased a 2023 Subaru Legacy that developed transmission shuddering within the first 6 months and 7,000 miles. After 3 repair attempts over 90 days at the Subaru dealership, the shuddering persisted. The buyer sent written notice to Subaru and, after Subaru refused a refund, filed suit in Hillsborough County Superior Court. The case settled for a full refund of the $32,000 purchase price plus all taxes and fees.

Nashua: A buyer bought a 2023 Toyota Camry with persistent electrical problems (dashboard warnings, window failures, audio system glitches) appearing within the first 8 weeks and 4,000 miles. The vehicle accumulated 32 days out of service over 4 months due to various electrical diagnostics and repairs. Using New Hampshire’s “30 days out of service” rule, the buyer filed a lemon law claim. Toyota authorized a replacement vehicle of equal value.

Portsmouth: A buyer purchased a 2024 Honda Accord that experienced a brake system warning light within the first month and 1,500 miles. This safety-related defect was addressed in one repair attempt that failed. The buyer sent notice to Honda and declined any further repair attempts, requesting a full refund. Honda settled the claim within 2 weeks with a full refund and reimbursement of registration fees.

Common Mistakes New Hampshire Lemon Law Buyers Make

• Waiting too long to file with 3-year protection: While New Hampshire’s 3-year window is generous, documentation becomes difficult after extended time. Service records may be discarded by dealerships after 1-2 years. File your notice early to ensure records are available.
• Accepting partial settlements without review: Before accepting a refund, confirm it includes the full purchase price, sales tax, registration, documentation fees, and any other costs associated with the purchase.
• Not documenting every repair attempt clearly: With only 3 attempts required (lower than some states), meticulously document each visit. Make sure your records clearly show the defect was present at each attempt.

Related Guides

• Lemon Law Guide: What to Do When Your Car Is Defective
• New Hampshire Small Claims Court
• New Hampshire Consumer Protection Laws
• Consumer Rights Guide

This article is for informational purposes only and does not constitute legal advice. Last reviewed: March 2026.