Massachusetts · Auto-Repair Consumer Rights
Massachusetts Auto Repair Laws & How to Sue a Mechanic
If a Massachusetts 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 Massachusetts law say about your repair?
See what Massachusetts’s auto repair laws say, side by side with what happened to you. Free.
Look up Massachusetts repair laws →Statutes that protect Massachusetts consumers
Failed to properly repair the vehicle (defective workmanship)
- Massachusetts common law of negligence (breach of the mechanic's duty of reasonable care) — Common-law negligence
Possible remedy: Compensatory damages for the cost to correct the defective repair and consequential losses; no fee-shifting at common law (fees available only through the paired c. 93A claim).
- 940 CMR 5.05(8) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages (cost to correct) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Caused additional damage to the vehicle
- Massachusetts common law of negligence (mechanic's duty of reasonable care) — Common-law negligence
Possible remedy: Compensatory damages for the additional damage caused (and, via a paired c. 93A claim, possible multiple damages and mandatory fees).
- 940 CMR 5.05(8) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages (cost of additional damage) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
No written estimate for labor and parts before work
- 940 CMR 5.05(3) (Attorney General Motor Vehicle Regulations); enforced as a per se unfair/deceptive act under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Attorney General's Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25, whichever is greater; the court must award not less than double and may award up to treble damages for a willful/knowing violation or bad-faith refusal to settle on demand; reasonable attorney's fees and costs are mandatory for a prevailing plaintiff (M.G.L. c. 93A, s. 9).
No authorization before proceeding with repairs or further repairs
- 940 CMR 5.05(3) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle on demand; mandatory attorney's fees and costs for a prevailing plaintiff (M.G.L. c. 93A, s. 9).
Exceeded the authorized estimate without the consumer's consent
- 940 CMR 5.05(7) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages (the overage) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Failed to provide an invoice / documentation for services performed
- 940 CMR 5.05(9) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Failed to return replaced parts though requested at the work order
- 940 CMR 5.05(4)(b) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Failed to perform the agreed-upon repairs or services
- 940 CMR 5.05(8)-(9) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Failed to properly diagnose the problem
- 940 CMR 5.05(4)(c) and 5.05(8) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Misrepresented the quality or origin of the parts used
- 940 CMR 5.05(9)(f) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Made repairs that were not authorized or not needed
- 940 CMR 5.05(3) and 5.05(7) (Attorney General Motor Vehicle Regulations); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Charged excessive fees for the services or repairs
- M.G.L. c. 93A, s. 2 (unfair or deceptive acts); private remedy M.G.L. c. 93A, s. 9; see also 940 CMR 5.05(3) (price-authorization requirement) — Unfair or deceptive act under c. 93A
Possible remedy: Actual damages (the overcharge) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Falsely advertised services or prices
- 940 CMR 5.02 (Advertising of Motor Vehicles); enforced under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Advertising Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Bait-and-switch tactic
- 940 CMR 5.02 (Advertising of Motor Vehicles) and M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Unfair or deceptive act under c. 93A (bait-and-switch)
Possible remedy: Actual damages or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Refused to release the vehicle without payment when the consumer disputed the work/fees
- M.G.L. c. 93A, s. 2 (unfair or deceptive acts) and 940 CMR 5.05(3) (no charge without proper authorization); private remedy M.G.L. c. 93A, s. 9; see also M.G.L. c. 255, s. 25 (garagekeeper's lien for proper charges) — Unfair or deceptive act under c. 93A (wrongful retention of vehicle)
Possible remedy: Actual damages (loss of use, costs to recover the vehicle) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Not properly licensed/registered with the state regulatory authority
- M.G.L. c. 100A, s. 2 (Motor Vehicle Damage Repair Shops - registration required); registration enforced and unregistered operation actionable as unfair/deceptive under M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Operating without required registration / unfair or deceptive act under c. 93A
Possible remedy: Actual damages or $25 minimum under c. 93A s. 9 (not less than double and up to treble for willful/knowing violation or bad-faith refusal to settle) plus mandatory attorney's fees; recovery may also be available against the shop's $10,000 statutory bond under c. 100A.
Failed to comply with its stated warranty to repair the vehicle
- 940 CMR 5.05(8) (good-and-workmanlike repair / no-charge correction) and M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Breach of repair warranty / unfair or deceptive act under c. 93A
Possible remedy: Actual damages (cost to honor the warranty) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Charged excessive storage fees while holding the vehicle
- 940 CMR 5.05(4)(a) (storage-charge disclosure) and M.G.L. c. 93A, s. 2; private remedy M.G.L. c. 93A, s. 9 — Violation of the Motor Vehicle Repair Regulations / unfair or deceptive act under c. 93A
Possible remedy: Actual damages (improper storage charges) or $25 minimum; not less than double and up to treble damages for a willful/knowing violation or bad-faith refusal to settle; mandatory attorney's fees and costs (M.G.L. c. 93A, s. 9).
Inspection station issued a fraudulent inspection certificate
- M.G.L. c. 90, s. 7W (licensing of inspection stations; revocation/suspension and penalties) and s. 7V (issuance of inspection certificates); consumer remedy via M.G.L. c. 93A, s. 2 and s. 9 — Inspection-station fraud / unfair or deceptive act under c. 93A
Possible remedy: Statutory fine of up to $1,000 and/or up to 30 days imprisonment, plus license suspension/revocation under c. 90, s. 7W; for the consumer, actual damages or $25 minimum under c. 93A s. 9, not less than double and up to treble for willful/knowing violation or bad-faith refusal to settle, plus mandatory attorney's fees.
Inspection station failed to properly perform the safety/emissions inspection
- M.G.L. c. 90, s. 7W (licensing of inspection stations; penalties and license suspension) and s. 7V (inspection certificates); consumer remedy via M.G.L. c. 93A, s. 2 and s. 9 — Improper inspection / unfair or deceptive act under c. 93A
Possible remedy: Statutory fine of up to $1,000 and/or up to 30 days imprisonment, plus license action under c. 90, s. 7W; for the consumer, actual damages or $25 minimum under c. 93A s. 9, not less than double and up to treble for willful/knowing violation or bad-faith refusal to settle, plus mandatory attorney's fees.
Free tools for your Massachusetts dispute
More Massachusetts guides
Massachusetts auto-repair FAQ
What is the small claims limit in Massachusetts?
In Massachusetts, you can generally sue in small claims court for up to $7,000 without a lawyer. Auto-repair disputes commonly fall within this limit.
Can I sue a mechanic in Massachusetts?
Yes. Massachusetts 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 22 Massachusetts statutes that may apply.
Who regulates auto repair shops in Massachusetts?
Office of the Massachusetts Attorney General — Consumer Advocacy and Response Division oversees auto-repair consumer issues in Massachusetts. 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 Massachusetts?
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.