Mechanic made it worse: when a repairer causes more damage

You took your car in for a routine service or a specific repair. You picked it up and something is clearly worse — a new noise, a new warning light, a component that wasn't mentioned in the quote now broken. Or the original problem is still there and a second mechanic tells you the first one made it significantly harder to fix. It's a situation that leaves most people feeling powerless, especially when the workshop insists the damage was pre-existing.

The good news is that Australian Consumer Law gives you a concrete set of rights when a repairer causes more damage than they fix. This article explains what those rights are, how to use them, and what to do when the workshop pushes back.

Quick answer

When a mechanic or car repairer causes additional damage while working on your vehicle, the practical remedy is usually the reasonable cost of putting it right. That may mean requiring the original repairer to rectify the problem at no cost. If they refuse or take too long, you may be able to have the work completed elsewhere and recover the reasonable cost; for a major failure, or one that can't be remedied, rectification costs may instead be recoverable as reasonably foreseeable loss. Depending on the circumstances you may also seek compensation for the reduction in the value of the service below the price you paid, or other reasonably foreseeable losses caused by the failure.

The key preconditions: the repairer must be acting in trade or commerce (almost all workshops and sole-trader mechanics qualify), and you need to be able to show that the damage resulted from the work they did, not just that it appeared while the car was in their care.

If the vehicle may be unsafe, deal with that first. Your rights are not conditional on driving a car you shouldn't. Getting a dangerous fault fixed promptly comes before preserving evidence, and there are ways to do both — see the steps below.

Once you have written to the business and they have refused or failed to respond, you can escalate — first to your state or territory consumer protection body (which may help if your complaint meets its criteria, but can't make binding orders), and then to a court or tribunal with jurisdiction over your dispute type and amount. Confirm the correct forum before filing.

What the law actually says

The Australian Consumer Law (ACL) is Schedule 2 to the Competition and Consumer Act 2010. Paying a workshop to service or repair your vehicle is a supply of services, and the ACL imposes consumer guarantees on them automatically — no disclaimer, sign or clause in the workshop's terms can waive them. Any parts fitted are goods, with their own guarantees such as acceptable quality (section 54).

The guarantee that matters most here is section 60, which requires that services be carried out with due care and skill. A mechanic who causes additional damage while working on your vehicle — overtightening a bolt and cracking a housing, incorrectly reassembling a component, using the wrong fluid, or disturbing a part they were not asked to touch — is likely to have breached section 60, provided the evidence establishes that the damage resulted from the work they performed. That proviso does the heavy lifting, which is why the evidence steps below matter as much as the law. The standard itself is objective: what would a competent repairer have done in the same circumstances?

Section 61 may also apply if you made known a particular purpose (that the car had to be fit for a long trip, say) or the result you wanted. The services, and any product resulting from them, must then be reasonably fit for that purpose and of a nature and quality that might reasonably be expected to achieve that result. Neither applies if the circumstances show you didn't rely, or it was unreasonable to rely, on the repairer's skill or judgment. Unlike section 60, you can't take action under section 61 if the failure happened only because of someone other than the repairer (or its agents or employees), or a cause independent of human control after the work was done (section 267(1)(c)).

Which remedy you get

Because the repair work is a service, its remedies sit in sections 267–270 of the ACL; a faulty part fitted during the repair is goods, covered by sections 259–263. Section 267 is the operative one: it sets out what you can require from the supplier. Section 268 defines when a failure is major, and the sections that follow deal with cancelling a services contract and what follows from that.

A failure is major if:

• a reasonable consumer fully acquainted with the nature and extent of the failure would not have acquired the service;
• the service is substantially unfit for a purpose for which services of that kind are commonly supplied, and can't easily and within a reasonable time be remedied;
• the service, and any resulting product, is unfit for a particular purpose you made known and can't easily and within a reasonable time be remedied;
• the service, and any resulting product, is not of such a nature, or quality, state or condition, that it might reasonably be expected to achieve a result you made known, and can't easily and within a reasonable time be remedied; or
• the service creates an unsafe situation.

Two or more failures that aren't major on their own are together a major failure if a reasonable consumer fully acquainted with them, taken as a whole, wouldn't have acquired the service (section 268(2)).

The unsafe-situation limb matters in vehicle repair more than almost anywhere else. If the work left the car dangerous — brake failure after a brake job, a wheel not properly secured, a fuel or oil leak that wasn't there before — that alone can make the failure major. See our guide to what major failure means for the fuller test.

Where a failure is major or can't be remedied, you may cancel and seek a refund for the unconsumed portion, or keep the contract and seek compensation for the reduction in the value of the service below the price paid (section 267(3)). For a repair that has already been carried out, though, cancelling is rarely the useful path — the practical focus is the cost of rectification, the reduction in value of the service you received, and any reasonably foreseeable loss (section 267(4)), without claiming the same loss twice.

For a non-major failure that can be remedied — a minor scratch on a panel caused during the service — the repairer gets the first reasonable opportunity to put it right within a reasonable time. If they refuse or take too long, you may be entitled to have the work done elsewhere and recover the reasonable cost, or to cancel where the statutory conditions are met.

Any term that purports to exclude, restrict or modify these guarantees is void to that extent under section 64. For an ordinary private vehicle repair that squarely favours you; a commercial or fleet arrangement may need closer analysis, including whether a limitation of liability is permitted under section 64A.

When this applies (and when it doesn't)

The consumer guarantees apply when you acquired the services as a consumer within the meaning of section 3 of the ACL — because the amount paid was $100,000 or less, or because vehicle repair is a service of a kind ordinarily acquired for personal, domestic or household use. Either limb is enough, and most private vehicle repairs satisfy both. If your vehicle is used primarily for a business, confirm how section 3 applies to your situation.

The ACL applies to businesses acting in trade or commerce. Most workshops and sole-trader mechanics qualify. A friend who fixes your car as a favour is not acting in trade or commerce, so the ACL does not apply to that arrangement.

The guarantees do not cover:

• Pre-existing damage the repairer did not cause. If it was there before you brought the car in, section 60 is not engaged for that damage.
• Damage you caused after picking up the car.
• Loss that was not reasonably foreseeable. Compensation extends to loss or damage that was reasonably foreseeable as a result of the failure — not merely whatever followed it in time. You will need evidence of the loss, a causal link to the repairer's failure, and to show you took reasonable steps to limit it rather than letting it grow.

Depending on the circumstances, provable loss may include reasonable towing charges, diagnostic costs, necessary alternate transport while the car is off the road, and the additional repair costs the first workshop's failure created. Whether any particular expense is recoverable turns on causation, foreseeability, the evidence you can produce, and whether you acted reasonably to limit it.

The harder factual question is usually proving the repairer caused the damage, not that it was pre-existing. That is why documentation before and after the service matters so much.

What to do today

1. Deal with safety before evidence. If the fault could make the car dangerous — brakes, steering, suspension, wheels, fuel, or a warning light you don't understand — do not drive it. Arrange towing rather than a test drive. Preserving evidence never outranks safety. Continuing to drive after you become aware of a serious fault may worsen the damage and complicate your claim.

Where an urgent repair genuinely cannot wait, you can protect both: photograph the fault thoroughly first, and get a written report from the workshop doing the rectification describing what they found and its likely cause. Ask them to preserve and release the removed parts to you where that is safe, lawful and practical — some components can't be handed over, because workshops have disposal obligations and parts like batteries, airbags and anything holding fluid carry safety or environmental restrictions. Where they can't release them, ask them to photograph the parts and describe their condition in the report before disposal. That record does the same evidentiary job as the damaged component sitting untouched.

2. Document everything before you leave the workshop. If you notice a problem when you pick the car up, raise it on the spot rather than driving away. Ask the service manager to note it in writing. Take dated photos of any visible damage.

3. Get an independent assessment. Take the car to a second mechanic for a written report. Ask specifically: is this damage consistent with the work the first workshop carried out, and what would it cost to rectify? A written quote and opinion from a second repairer is usually the most persuasive evidence available to you.

4. Write to the repairer. Email beats a phone call — it creates a record. State the date of the service, describe the damage you say was caused, refer to the section 60 due care and skill guarantee, attach the second mechanic's report and quote, and say clearly what you want: rectification at no cost to you, or compensation equal to the cost of having it fixed elsewhere. Give a reasonable deadline; 14 days is a practical default, not an ACL requirement.

If you're not sure how to draft that letter, fairgo can generate one for you. The wizard identifies the relevant ACL sections and produces a letter you send under your own name.

5. Keep all records. The original invoice, written quotes, the second mechanic's report, photos, any parts you were able to keep, and every email exchanged with the workshop. Where a component can safely be left as-is until the dispute resolves, leave it — but see step 1 where safety is in question, and remember a photograph plus a written description carries the point where the part itself cannot be kept.

What if the business refuses

If the workshop denies liability or simply doesn't respond, you have several escalation options.

Your state or territory consumer protection body may help, for example by contacting the business or conciliating, if your complaint meets its criteria. Most expect you to have tried to resolve the matter with the business first, and eligibility rules vary by state and dispute type (in the ACT, for example, statutory conciliation applies only where the remedy you seek is worth $5,000 or less). These bodies don't make binding orders in ordinary consumer disputes and can't make the business settle — only a court or tribunal can order payment. Contact details are at /agencies.

Motor-vehicle-specific pathways. Vehicle repair is a licensed trade in some states (NSW and Western Australia, for example), where the state consumer body also licenses repairers. Ask your state consumer body whether licensing rules apply where you live, and whether it can act on the repairer's licence as well as conciliating.

A tribunal or court with jurisdiction. In NSW, Victoria, Queensland, the ACT and the NT, a tribunal (NCAT, VCAT, QCAT, ACAT or NTCAT) hears many consumer claims within its limits; in Western Australia, South Australia and Tasmania, ordinary consumer claims go to the Magistrates Court. Jurisdiction depends on each forum's enabling legislation, the type of claim and the amount, so confirm the forum and its current thresholds on the official site before filing. You can usually run a claim without a lawyer, though some forums restrict legal representation (QCAT, for example, requires permission). Check current filing fees on the official site, and ask about fee exemptions, waivers or deferrals if cost is a concern. Our guide to choosing the right tribunal or court has more.

The ACCC investigates systemic conduct, not individual disputes. A report may contribute to broader action but will not resolve your claim. For more on the escalation sequence, see services that go wrong under the ACL and what to do when a business refuses.

Common mistakes

• Driving a car you suspect is unsafe to preserve evidence. Photographs, diagnostic records and a detailed written report from the rectifying workshop can preserve the important evidence where the damaged component cannot safely or practically be retained. No claim is worth a brake failure at speed.
• Accepting "it was pre-existing" without asking for the basis. Ask the workshop to put that in writing, identifying what they observed and when. A bare assertion is not evidence, and reluctance to commit it to writing is telling.
• Relying only on your own opinion of the damage. You are not the expert and a tribunal knows it. The second mechanic's written report is what carries the claim.
• Letting the first workshop "fix" it without a written record. If you do let them rectify, get the fault and the proposed work documented in writing first — otherwise the evidence of what went wrong disappears into the repair.
• Only calling, never writing. Phone calls are not evidence. Follow up every conversation with an email summarising what was said.
• Waiting too long. The ACL sets no single fixed warranty-style expiry for consumer guarantee claims, but limitation laws and forum rules still apply, and delay makes causation far harder to establish. Raise it in writing as soon as you identify the problem.
• Confusing overcharging with damage. They are different claims with different evidence. If the bill is the issue rather than the workmanship, see mechanic overcharged you. If the work itself was substandard, section 60 is your provision.

Where the evidence establishes that a repairer caused additional damage, those facts may provide a strong basis for a due care and skill claim. The strongest claims are usually the ones documented promptly — photographs, written reports, diagnostic findings, quotes and contemporaneous correspondence.

Related reading

• Mechanic overcharged or fixed the wrong thing? Your ACL options
• Section 60 ACL: the due care and skill guarantee
• What "major failure" really means under the ACL
• Services that go wrong — your ACL rights explained
• Business refused your refund? Here's what to do next

This article is general information about Australian Consumer Law, not legal advice. The ACL is complex and your situation may have details that change the analysis. It also describes complaint and escalation pathways — including state and territory consumer bodies, motor vehicle licensing bodies, tribunals and courts, and the ACCC — and limitation laws, whose scope, rules, thresholds and processes sit outside the ACL and can change. Confirm the current position with the relevant body before lodging any complaint or claim. For advice on your specific case, see your state or territory consumer body — full list at /agencies.