Buying a Used Car Guide UK (Consumer Rights, Checks, 2026)

Buying from a Dealer vs Private Seller

Buying from a motor trader or dealer gives you the strongest legal protections. Under the Consumer Rights Act 2015, a dealer must sell you a car that is: of satisfactory quality (must be safe, durable, and free from minor defects), fit for purpose (must do what it is meant to do), and as described (must match its description, mileage, and history). If the car develops a fault within the first 30 days, you can reject it and get a full refund. After 30 days but within six months, the dealer gets one chance to repair or replace it — if that fails, you can still reject it (though a deduction for use may apply). From six months to six years (five in Scotland), you must prove the fault existed at the time of sale. A private seller, by contrast, only has to describe the car accurately and cannot misrepresent its condition. They are not required to offer any warranty or accept returns. Private sales are sold as seen. However, if the private seller knowingly lied about something significant (e.g. clocking the mileage), you can sue for misrepresentation. Always get a written receipt regardless of who you buy from — it is your proof of purchase and essential for any legal claim.

Your Rights Under the Consumer Rights Act 2015

The Consumer Rights Act 2015 is your primary protection when buying from a dealer. It gives you a short-term right to reject (30 days), a right to repair or replacement, and a final right to reject. If you discover a fault within 30 days of purchase, you can reject the car outright and demand a full refund. The dealer cannot deduct for fair wear and tear unless you have driven an unusually high mileage. If the fault appears between 30 days and 6 months, the dealer must repair or replace the car. They have one chance to fix it. If the repair fails (or the replacement is also faulty), you can then reject the car and claim a refund. The dealer may make a deduction for use, typically calculated as a percentage of the purchase price based on miles driven. After 6 months, the burden of proof shifts to you — you must show the fault existed at the time of delivery. In practice, you will need a mechanic's report or expert evidence. You have up to 6 years (5 in Scotland) to bring a claim, though after the first 6 months it becomes increasingly difficult. The dealer cannot exclude these rights — any "sold as seen" term from a dealer is legally unenforceable. Always keep records of all communication, repair invoices, and inspection reports.

What to Check Before Buying

A thorough pre-purchase inspection can save you thousands. Start with an HPI check (Hire Purchase Investigation) — this reveals whether the car has outstanding finance, is stolen, has been written off by an insurer, or has a cloned identity. Use a provider like the AA, RAC, or HPI Check — costs around £10–£20. Also check the MOT history for free at gov.uk/check-mot-history. Look for recurring advisories, failure reasons, mileage discrepancies, and corrosion flags. A pattern of low-mileage years followed by a spike suggests possible clocking. Check service records — a full dealer service history adds value and confidence. A missing service history is a red flag, especially if the car has over 60,000 miles. Look for timing belt changes (typically every 4–5 years or 60,000–80,000 miles). Physically inspect: tyre tread depth (minimum 1.6mm), body panel alignment (signs of accident repairs), rust on sills and arches, fluid levels and colour (milky oil or discoloured coolant indicate head gasket issues), and all electronics (windows, air conditioning, infotainment). Take a test drive on varied roads — listen for knocks, whines, and vibrations. Consider a pre-purchase inspection from the AA, RAC, or a local garage — typically £100–£200 and money well spent.

How Long the Dealer Has to Repair or Refund

If a fault appears, the timeframe for a dealer's response depends on when you discover it. In the first 30 days, you have the short-term right to reject — you can tell the dealer you want a refund, and they must comply within 14 days. You do not have to accept a repair. In the 31 days to 6 months window, the dealer can attempt a repair. They must do so within a reasonable time and without significant inconvenience. The law does not specify an exact number of days, but the Consumer Rights Act says "without undue delay." If the dealer takes too long (typically 2–4 weeks without a clear timeline), you may be entitled to reject the car. After a failed repair attempt (one is enough if the same fault recurs), you can invoke the final right to reject — a refund minus a deduction for use. The dealer must process the refund within 14 days of you notifying them. If the dealer refuses to cooperate, you can escalate to Small Claims Court (claims under £10,000) or the County Court. Always put everything in writing — emails with dated evidence are your strongest tool. If the dealer is part of a trade body like the Motor Ombudsman, you can also use their alternative dispute resolution service.

Your Rights if the Car Has a Hidden Fault

A hidden fault (latent defect) is a problem that existed at the time of sale but was not discoverable through a reasonable inspection. Examples include: a developing head gasket failure, an intermittent electrical fault in the ECU, a gearbox synchromesh issue, or structural corrosion inside a box section. If you bought from a dealer, the Consumer Rights Act covers hidden faults in the same way as visible ones — the key question is whether the car was of satisfactory quality at the time of sale. A hidden fault that renders the car unsafe, unreliable, or unfit for purpose breaches the Act. You must prove the fault existed at delivery — easier within the first 6 months (presumption in your favour), harder after that. Obtain a specialist mechanic's report that states the fault's likely cause and when it originated. If you bought from a private seller who knew about the fault and concealed it, you may have a claim for misrepresentation. This requires evidence the seller actively lied (e.g. saying "no mechanical issues" when they knew about a problem). You can claim damages for the cost of repair or the difference in value. If the seller was a trader masquerading as a private seller (common on Facebook Marketplace and Gumtree), you still have full Consumer Rights Act protections — the same as buying from a dealer. Report suspected trader-fakes to Trading Standards via Citizens Advice.

Buying a Used Car on Finance or Hire Purchase

If you buy a used car using HP (Hire Purchase) or PCP (Personal Contract Purchase), the finance company is jointly responsible with the dealer under Section 75 of the Consumer Credit Act 1974. This means if the car turns out to be faulty or the dealer refuses to help, you can claim against the finance company instead — and they are equally liable. For purchases between £100 and £30,000, Section 75 gives you the same rights against the lender as you have against the dealer. This is a powerful backstop, especially if the dealer has gone out of business. If you paid by debit card, you may be able to use chargeback (see our Chargeback guide), though this is a voluntary scheme not a legal right. When buying on finance, check the APR and total amount payable before signing — dealer-arranged finance often carries higher rates than a direct personal loan. Some PCP agreements include a final balloon payment — ensure the car's projected value is realistic. If you end the agreement early, you have a voluntary termination right under the Consumer Credit Act — once you have paid 50% of the total amount payable, you can return the car with no further payment (except for damage or excess mileage). Always conduct an HPI check even on a financed car — you do not want to buy a vehicle that still has outstanding finance attached to it, as the finance company could repossess it.

FAQs

Can I return a used car to a dealer after 30 days?

Yes, but only after the dealer has had one chance to repair it. If the repair fails or the same fault recurs, you can use your final right to reject and claim a refund (minus a deduction for use).

What if the private seller lied about the car's condition?

You can sue the private seller for misrepresentation if they knowingly made a false statement (e.g. clocking the mileage or hiding crash damage). You will need evidence — a mechanic's report, photos, or written messages.

Do I need a warranty when buying a used car?

No — your statutory rights under the Consumer Rights Act 2015 already provide protection for the first 6 years. A dealer warranty may add convenience but cannot replace or limit your legal rights.

Can I reject a used car with no MOT?

If a dealer sells a used car without a valid MOT and it cannot pass one, the car is likely not of satisfactory quality. You can reject it under the Consumer Rights Act. A private seller may sell without MOT but must disclose known faults.

What is cooling-off when buying from a dealer?

If you buy from a dealer at your home or online (distance selling), you have a 14-day cooling-off period under the Consumer Contracts Regulations. If you buy at their premises, there is no automatic right to cancel.