The one thing to know first
The short answer: a shop generally can't charge you for work you never authorized, hold your car forever, or ignore a botched repair — but every one of those protections depends on your state's law and the paperwork you have. Written authorization, a written estimate, and a paper trail are your entire case. Everything on this site is built around building one.
Start with your situation
Unauthorized work
The shop did work I never approved — do I have to pay?
Authorization is the whole ballgame. What counts as approval, and what to do when they charged anyway.
The estimate doubled mid-job — do I have to pay the difference?
Written estimates vs. the final bill, when a price change is legal, and the second-opinion move.
The shop charged me for parts I'm not sure they installed — what now?
Old-parts rules, invoice line items, and how to prove phantom work.
Getting your car back
The shop won't release my car until I pay — is that legal?
When a shop can hold your car, when it can't, and how to get rolling again.
The shop says they'll put a lien on my car — what does that mean?
Mechanic's liens in plain English: what they are, what they let the shop do, and your defenses.
Can I pay "under protest" to get my car back and fight it later?
Yes — this is often the smartest move. How to pay without giving up your claim.
Bad repairs & who to fight
The repair failed weeks later — does the shop have to fix it?
Repair warranties, implied promises, and how to make the shop make it right.
Dealer vs. independent shop dispute — does it change the fight?
Different leverage, different escalation paths. How to pick your battlefield.
Proving your case
How this site works
Every guide answers one real question — the kind car owners actually type into a search box at midnight, fuming in the driveway — in plain English, with the answer first and the depth after. No legalese, no shop talking points.
Insurance-claim fights are a different battle with a different opponent — if your dispute is with your insurer over a covered repair, our sibling auto-claims site owns that territory. Warranty-contract fights (extended warranties, protection plans) belong to our sibling warranty site. This site is about the shop counter: the transaction between you and the people who touched your car.
Auto repair laws vary enormously by state — written-estimate rules, authorization requirements, and lien procedures all differ. Check your state's attorney general or motor-vehicle repair bureau, or talk to a licensed professional, before acting on a dispute.