Things go wrong with car repairs and purchases, and knowing how to complain effectively — using the right channels, in the right order — dramatically increases your chances of a satisfactory outcome. An angry phone call rarely achieves as much as a well-constructed written complaint. Here’s how to navigate the process.
Know Your Rights First
Your rights differ depending on whether you bought from a dealer or a private seller, and whether the issue is with a purchase or a repair.
Buying from a dealer. The Consumer Rights Act 2015 gives you strong protections. Goods must be of satisfactory quality, fit for purpose, and as described. For cars, “satisfactory quality” means the car should be in the condition a reasonable person would expect given the price, age, and mileage. If the car develops a fault within 30 days, you can reject it for a full refund. Between 30 days and six months, you’re entitled to a repair or replacement first (at the dealer’s choice), and if that fails, a refund. After six months, the burden of proof shifts — you may need to demonstrate the fault was present at sale.
Repairs and servicing. Under the Consumer Rights Act, services must be performed with reasonable care and skill, in a reasonable time, and at a reasonable price (if no price was agreed in advance). If work is done poorly, you’re entitled to have it redone or receive a reduction in price.
Private sales. “Buyer beware” — the Consumer Rights Act protections don’t apply to private sales. Your recourse is limited to misrepresentation claims if the seller actively lied about the car’s condition or history.
Step 1: Complain in Writing to the Business
Always put your complaint in writing, even if you’ve already had a verbal conversation about it. Email is fine — it’s dated and provides a record. A letter sent by recorded delivery is better for serious disputes.
State the facts clearly and specifically: what was purchased or what work was done, when, what the problem is, what you’ve been told, and what outcome you’re seeking. Keep the tone professional — describe the problem and the remedy you want, not how you feel about the business. Emotional language makes complaints easier to dismiss.
Give the business a reasonable deadline to respond — 14 days is standard. Keep copies of everything.
Step 2: Escalate Within the Business
If your initial contact doesn’t produce a satisfactory response, ask to escalate to the dealership principal, service manager, or company director. Many complaints that are initially mishandled by front-line staff are resolved when they reach someone with authority and a clearer view of the reputational and legal consequences.
If it’s a franchised dealer (a BMW dealer, Vauxhall dealer, etc.), the manufacturer’s customer service department can sometimes apply pressure to resolve disputes. Manufacturers care about dealer standards and don’t want customer disputes becoming public.
Step 3: Use an Alternative Dispute Resolution Scheme
Most car dealers and garages belong to a trade association that operates an Alternative Dispute Resolution (ADR) scheme — a formal process for resolving disputes without going to court.
The main schemes for car dealers include: The Motor Ombudsman, which covers dealers signed up to its code of practice (check motorombudsman.org to see if your dealer is registered). The SMMT (Society of Motor Manufacturers and Traders) and RMI (Retail Motor Industry Federation) cover members through their own codes. National Conciliation Service covers many independent garages.
ADR schemes are free to use and produce binding or non-binding decisions depending on the scheme. The Motor Ombudsman in particular has a good track record on straightforward disputes. Escalating to ADR before going to court is often required — and usually quicker and cheaper.
Step 4: Trading Standards
If you believe the dealer has committed a criminal offence — selling a car with fraudulently concealed history, misrepresenting a vehicle as something it isn’t — report it to Trading Standards via the Citizens Advice consumer helpline (0808 223 1133). Trading Standards investigates and prosecutes; it doesn’t handle individual civil claims, but a report can trigger investigation that protects other consumers.
Step 5: Small Claims Court
For civil claims up to £10,000 in England and Wales (£5,000 in Scotland, £3,000 in Northern Ireland), the small claims court is a practical option. The process is designed to be accessible without a solicitor, and the court fee is modest relative to the claim amount. The threat of court proceedings often prompts settlement — send a formal “letter before action” stating your intention to issue a claim if the matter isn’t resolved within 14 days.
For claims above the small claims limit, you’ll need to consider whether the costs of litigation are proportionate.
Practical Tips
Document everything from the start. Photographs of the fault, dated and timestamped, are invaluable. Keep all invoices, communications, and paperwork. Don’t have additional work done on a disputed repair by the same garage — have any further assessment done independently.
If a garage is refusing to release your car until you pay a disputed bill, you are in a difficult position legally — they have a lien over the vehicle while work is disputed. Take legal advice before paying under protest, and if you do pay, make clear in writing that payment is under protest and does not constitute acceptance of the work.
Effective complaints are specific, documented, and persistent. Most disputes are resolved before reaching court when the business understands you know your rights and are prepared to use them.
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