New Hampshire · Auto-Repair Consumer Rights
New Hampshire Auto Repair Laws & How to Sue a Mechanic
If a New Hampshire shop overcharged you, did unauthorized work, or botched a repair, state law is on your side. Here are the statutes that protect you, your small-claims limit, and free tools to get a refund or fix — no lawyer needed.
What does New Hampshire law say about your repair?
See what New Hampshire’s auto repair laws say, side by side with what happened to you. Free.
Look up New Hampshire repair laws →Statutes that protect New Hampshire consumers
No written estimate for labor and parts before work
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:2 (When Written Estimate Required); enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Actual damages or $1,000 whichever is greater under RSA 358-A:10; mandatory 2x-3x (not less than double, up to treble) where the violation is willful or knowing; costs and reasonable attorney's fees to a prevailing plaintiff; under RSA 358-D:12, II the facility forfeits payment for non-compliant work.
No authorization before proceeding with repairs or further repairs
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:3 (Authorization to Proceed); enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Forfeiture of all payment for unauthorized work under RSA 358-D:12, II; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Exceeded the authorized estimate without the consumer's consent
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:5 (Effect of Exceeding the Estimate) and RSA 358-D:4 (Additional Service or Repair Work); enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Customer not liable for unauthorized overage above 10 percent; forfeiture of payment for non-compliant work under RSA 358-D:12, II; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Failed to provide an invoice / documentation for services performed
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:10 (Required Work Invoice); enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Forfeiture of payment for non-compliant work under RSA 358-D:12, II; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Failed to return replaced parts though requested at the work order
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:9 (Return of Replaced Parts); enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Forfeiture of payment for non-compliant work under RSA 358-D:12, II; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Failed to properly repair the vehicle (defective workmanship)
- New Hampshire Consumer Protection Act, RSA 358-A:2; private remedy RSA 358-A:10 — Unfair or deceptive act or practice (and common-law breach of contract / negligent performance of services)
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and reasonable attorney's fees under RSA 358-A:10.
Failed to perform the agreed-upon repairs or services
- New Hampshire Consumer Protection Act, RSA 358-A:2; private remedy RSA 358-A:10 — Unfair or deceptive act or practice (and common-law breach of contract)
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10; contract damages at common law.
Caused additional damage to the vehicle
- New Hampshire common law (negligence); cumulative with New Hampshire Consumer Protection Act, RSA 358-A:2 and private remedy RSA 358-A:10 — Common-law negligence (and unfair/deceptive practice under RSA 358-A)
Possible remedy: Compensatory damages for repair cost and diminished value at common law; enhanced compensatory damages where conduct is wanton/malicious; actual damages or $1,000 minimum plus mandatory 2x-3x and attorney's fees under RSA 358-A:10 where deceptive.
Failed to properly diagnose the problem
- New Hampshire Consumer Protection Act, RSA 358-A:2; private remedy RSA 358-A:10 — Unfair or deceptive act or practice (and common-law negligent performance of services)
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10.
Misrepresented the quality or origin of the parts used
- New Hampshire Consumer Protection Act, RSA 358-A:2, VI and VII; private remedy RSA 358-A:10 — Unfair or deceptive act or practice
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10.
Made repairs that were not authorized or not needed
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:3 and RSA 358-D:4; enforced via RSA 358-D:12 and the Consumer Protection Act private-remedy section RSA 358-A:10 — Violation of the Motor Vehicle Repair Law (per se unfair/deceptive act under RSA 358-A:2)
Possible remedy: Forfeiture of all payment for unauthorized work under RSA 358-D:12, II; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Charged excessive fees for the services or repairs
- New Hampshire Consumer Protection Act, RSA 358-A:2; private remedy RSA 358-A:10; cumulative with RSA 358-D:5 and RSA 358-D:12 — Unfair or deceptive act or practice
Possible remedy: Refund/credit of the excess; actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10.
Falsely advertised services or prices
- New Hampshire Consumer Protection Act, RSA 358-A:2, VII, IX and XI; private remedy RSA 358-A:10 — Unfair or deceptive act or practice (false advertising)
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10.
Bait-and-switch tactic
- New Hampshire Consumer Protection Act, RSA 358-A:2, IX and X; private remedy RSA 358-A:10 — Unfair or deceptive act or practice (bait and switch)
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10.
Refused to release the vehicle without payment when the consumer disputed the work/fees
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:12 (no payment owed for non-compliant work); New Hampshire mechanic's lien for labor, RSA 450:2; Consumer Protection Act private remedy RSA 358-A:10 — Wrongful retention / improper lien assertion (and unfair/deceptive practice under RSA 358-A)
Possible remedy: Release of the vehicle; damages for wrongful detention and loss of use; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Not properly licensed/registered with the state regulatory authority
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:1 (Definitions) and RSA 358-D:11 (Notice Requirements); Consumer Protection Act RSA 358-A:2 and private remedy RSA 358-A:10 — Violation of the Motor Vehicle Repair Law / unfair or deceptive act
Possible remedy: Actual damages or $1,000 whichever is greater; mandatory 2x-3x for willful or knowing violations; costs and attorney's fees under RSA 358-A:10; forfeiture of payment for non-compliant work under RSA 358-D:12, II.
Failed to comply with its stated warranty to repair the vehicle
- New Hampshire Motor Vehicle Repair Law, RSA 358-D:10 (invoice must state guarantee terms); Consumer Protection Act RSA 358-A:2; private remedy RSA 358-A:10 — Breach of express warranty / unfair or deceptive act
Possible remedy: Cost to complete or correct the repair; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Charged excessive storage fees while holding the vehicle
- New Hampshire storage lien, RSA 450:1; cumulative with Consumer Protection Act RSA 358-A:2 and private remedy RSA 358-A:10 — Improper lien charge / unfair or deceptive act
Possible remedy: Disallowance of improper storage charges; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Inspection station issued a fraudulent inspection certificate
- New Hampshire RSA 262:16 (Counterfeit, Unauthorized or Forged Stickers or Decals); cumulative consumer remedy under Consumer Protection Act RSA 358-A:2 and RSA 358-A:10 — Issuance of fraudulent inspection sticker (criminal) / unfair or deceptive act for consumer recovery
Possible remedy: Criminal penalties under RSA 262:16; for the consumer, actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Inspection station failed to properly perform the safety/emissions inspection
- New Hampshire Consumer Protection Act, RSA 358-A:2; private remedy RSA 358-A:10 — Unfair or deceptive act or practice
Possible remedy: Refund of the inspection fee and consequential damages; actual damages or $1,000 minimum, mandatory 2x-3x for willful/knowing conduct, plus costs and attorney's fees under RSA 358-A:10.
Free tools for your New Hampshire dispute
More New Hampshire guides
New Hampshire auto-repair FAQ
What is the small claims limit in New Hampshire?
In New Hampshire, you can generally sue in small claims court for up to $10,000 without a lawyer. Auto-repair disputes commonly fall within this limit.
Can I sue a mechanic in New Hampshire?
Yes. New Hampshire consumer-protection and auto-repair laws cover this kind of situation, including overcharges, unauthorized work, and faulty repairs. Many disputes start with a demand letter before small claims court. We track 20 New Hampshire statutes that may apply.
Who regulates auto repair shops in New Hampshire?
Consumer Protection & Antitrust Bureau, New Hampshire Department of Justice oversees auto-repair consumer issues in New Hampshire. You can file a complaint with them in addition to (or instead of) sending a demand letter.
Do I need a lawyer to send a demand letter in New Hampshire?
No. A clear, statute-citing demand letter is something you can send yourself — it is often what gets a shop to refund or fix the problem before court.
This page is general information, not legal advice, and is not a substitute for a licensed attorney. Court rules, dollar limits, and filing fees vary by county — confirm yours before filing.