The short answer
No, you don't just have to pay up and live with it. You don't have a blanket right to refuse the bill either. If the work wasn't done properly, the Consumer Rights Act 2015 gives you a sequence of remedies. First comes the right to make the garage do the job again at its own cost, and if that fails or was never possible, a price reduction that can run up to the full price, refunded to you.
Section 49 is the starting point. Every contract to supply a service "is to be treated as including a term that the trader must perform the service with reasonable care and skill". So a garage that misdiagnosed the fault, fitted a part that was never going to cure it, or botched the job has arguably fallen short of that.
What the law actually says
A garage repair is a service bought from a trader, so the Consumer Rights Act 2015 applies. Three implied terms matter:
- Reasonable care and skill (s.49): the work must meet the standard of a competent garage.
- A reasonable price (s.51): if no price was fixed in advance, you pay "a reasonable price for the service, and no more".
- A reasonable time (s.52): if no timescale was agreed, the job must be done within a reasonable one.
If the garage breaches the care-and-skill term, section 54 gives you two statutory remedies, in this order.
Repeat performance comes first (s.55). You can require the garage to do the job again "to the extent necessary to complete its performance in conformity with the contract". That has to happen within a reasonable time and without significant inconvenience to you, with the garage bearing all necessary costs including labour and materials. You can't demand it if finishing the job properly is genuinely impossible.
Price reduction comes second (s.56). It opens up if repeat performance isn't possible, or hasn't happened within a reasonable time and without significant inconvenience. Then you can require the price to be reduced by an appropriate amount, up to the whole price.
A refund must come without undue delay, and within 14 days of the garage agreeing you're entitled to it. It goes back by your original payment method, and the garage can't charge a fee for it.
Section 54 also confirms these sit alongside your ordinary contract rights. You can claim damages too, though not twice for the same loss. That matters if the failed repair cost you more than the bill itself: recovery, a hire car, a second garage putting it right.
Can you refuse to pay, or hold back part of the bill?
Be careful. Section 56 gives you a reduction of an appropriate amount, so a specific, reasoned deduction is a stronger position than refusing everything. Part of the work may well have been done competently. A diagnostic strip-down often is, even when it points somewhere unhelpful.
There's a practical problem, too. A garage can generally keep your car until its bill is paid, though Citizens Advice's guidance is that it is "not allowed to sell or get rid of the car while you're disputing the bill".
So if you need the car back, the usual move is to pay under protest. Write the words "paying under protest" on the garage's copy of the repair order and on your receipts. Citizens Advice is blunt about why. Without it, the garage can argue that by paying you accepted the charges, which makes getting money back later harder.
What to do next, step by step
1. Go back to the garage first
Every later route expects you to have given them a fair chance, and section 55 gives you the right to demand exactly that, at their cost. Put it in writing: the original symptom, what they did, what's still wrong, and that you're requiring repeat performance under the Consumer Rights Act 2015.
2. Get a second opinion if they refuse
A written quote or report from another garage is the most useful evidence you can get, and Citizens Advice suggests it helps prove the work needs doing again. On a bigger bill, an independent engineer's assessment carries more weight, and its cost is sometimes split between you and the garage. Good service and repair records help establish what was done and when.
3. Check whether the garage is Motor Ombudsman accredited
That decides which of the two escalation routes is open to you. Check it before writing another letter. The Motor Ombudsman publishes a Garage Finder for the purpose.
Disputing a mechanic's bill: the Motor Ombudsman route
The Motor Ombudsman is the motor trade's alternative dispute resolution (ADR) body, an independent third party that settles disputes without court. It runs Chartered Trading Standards Institute-approved Codes of Practice. One of them is the Service and Repair Code, updated 1 June 2025, which commits accredited garages to honest and fair service, work completed as agreed, transparent pricing, invoices matching quoted prices, and a straightforward complaints procedure.
There's a big catch. It only covers businesses that have signed up. Accreditation is voluntary, not a regulatory requirement, and The Motor Ombudsman states plainly that it cannot take on a complaint about a business that isn't accredited to a Code of Practice. All it can do is signpost you elsewhere.
If yours is accredited, the process is free to consumers:
- Complain to the garage directly. It has eight weeks to give its final answer.
- Once that passes, or you get a final response you're unhappy with, check the dispute is within remit. Repairs and servicing are; car finance, insurance and hire cars aren't.
- Submit online with your evidence: invoices, your complaint, their replies, any second opinion.
What if the garage isn't accredited?
You still have options. They're just less tidy.
- Citizens Advice consumer service (0808 223 1133): free, impartial advice on your situation. Advisers can't complain for you or take legal action, but they pass complaint information to Trading Standards.
- Trading Standards: worth reporting misleading pricing or unfair practices, but treat it as regulating the trade rather than recovering your money. It acts on patterns, not single bills.
- Another trade association: some garages belong to a different body with its own conciliation service. Ask which, if any.
- Small claims: the county court route, below.
When the repair bill stops being worth it
Sometimes the question underneath a disputed bill isn't a legal one at all. It's whether a car that keeps going back is worth keeping. Our free car check includes a running-costs estimate for the specific vehicle, covering things like insurance, maintenance and fuel. It won't tell you what's wrong with your car, but it gives you a number to hold the repair quotes against.
If you do change cars, the used car warranty guide explains where statutory rights end and paid cover begins. A warranty never replaces the Consumer Rights Act protections above. This guide is part of our wider series on running a used car.
Taking a garage to small claims court
Which route you use, and the ceiling on it, depends where you are:
- England and Wales: you can make a county court money claim online. Under the Civil Procedure Rules, the small claims track is the normal track for claims worth not more than £10,000, and the court will require mediation for disputes at or below that value before a hearing.
- Scotland: Simple Procedure instead, for claims of not more than £5,000.
- Northern Ireland: the small claims process covers claims of not more than £5,000, excluding categories such as personal injury, road traffic accidents and defamation.
Court fees apply and vary with the amount claimed, so check the current scale on gov.uk before filing.
The process is designed to work without a solicitor. It still costs you time and a fee, and it needs evidence. The second opinion, the annotated "paying under protest" invoice, and a written record of what you asked for are what turn a grievance into a claim.
If you paid by card: section 75 and chargeback
Paying by credit card gives you a second party to claim against. Under section 75 of the Consumer Credit Act 1974, the card provider is jointly and severally liable with the trader for misrepresentation or breach of contract. It applies where the cash price is more than £100 and no more than £30,000, and Citizens Advice's guidance is that paying any part of that cost on a credit card brings the whole amount into scope.
Debit cards don't get section 75. What you have instead is chargeback, a card scheme process your bank can use to try to reclaim the payment. FCA guidance puts it plainly: "Chargeback is not a statutory right." It follows the card schemes' own rules, and Mastercard, Visa and Amex each set their own, so nothing is guaranteed.
The same guidance says consumers normally have 120 days to raise a chargeback claim with their card issuer, and that a chargeback only recovers what you paid on the card, not any consequential losses. Ask your bank early.
FAQs
Do I have to pay if the garage didn't fix my car?
Not necessarily in full. If the work wasn't done with reasonable care and skill, the Consumer Rights Act 2015 lets you require the garage to redo it at its cost. If that isn't possible, or doesn't happen within a reasonable time, you can require a price reduction of an appropriate amount, up to the whole price. What you don't get is an automatic right to walk away paying nothing.
The garage did the repair I authorised, but the fault's still there. Is that their problem?
It can be. Authorising a job doesn't waive your section 49 right to have it done with reasonable care and skill, and where the garage did the diagnosis, that diagnosis was part of the service you paid for. The exception is a genuinely different fault that has arisen since.
Can I refuse to pay the bill until it's fixed, and what does "paying under protest" mean?
You can dispute it, but tread carefully. A garage can generally keep your car until its bill is settled, though Citizens Advice says it can't sell or dispose of the car while you're disputing. If you need the car back, paying under protest is usually safer: paying while making clear in writing that you don't accept the charge, which Citizens Advice advises writing on the garage's copy of the repair order and on your receipts. Without it, the garage can argue you accepted the charges by paying.
What if my garage isn't signed up to the Motor Ombudsman?
It can't take the case. Your routes are the Citizens Advice consumer service (0808 223 1133) for advice, Trading Standards for reporting unfair practices, any other trade association the garage belongs to, and ultimately a small claims money claim.
Can I take a garage to small claims court?
Yes. In England and Wales the small claims track covers money claims of not more than £10,000, started online through the county court, with mediation required at or below that value. Scotland uses Simple Procedure for claims of not more than £5,000; Northern Ireland's small claims process covers claims up to £5,000.
Do I still have to pay the diagnostic fee if the repair didn't work?
There's no special rule for diagnostic fees, so the same Consumer Rights Act tests apply to them as to the repair. A diagnostic strip-down carried out with reasonable care and skill is a service in its own right, so it will generally be chargeable even if what it found didn't cure the fault. Where no fixed price was agreed, section 51 means you only owe a reasonable price for it, and if the diagnosis itself fell below a competent standard, that's a section 49 argument like any other. It depends on the facts, so it's worth putting your own circumstances to the Citizens Advice consumer service.