Used Car Warranty Law UK: What a 3-Month Warranty Actually Means

Somewhere on the paperwork for most dealer-sold used cars is a line about a warranty — three months is the classic, sometimes six, occasionally twelve. And built into that little line are two of the most profitable misunderstandings in the used car trade: that the warranty is where your protection comes from, and that when it runs out, so do your rights.

Neither is true. Here's how used car warranties actually work in UK law — and when you should ignore yours entirely.

Is a Dealer Legally Required to Give a Warranty on a Used Car?

No. There is no UK law requiring any dealer to provide a warranty on a used car — not three months, not thirty days, not anything. A dealer selling with no warranty at all is acting completely legally.

That surprises people, and the reason it doesn't matter is the important part: your real protection doesn't come from the warranty. Every car sold by a trader is covered by the Consumer Rights Act 2015, which requires it to be of satisfactory quality, fit for purpose and as described — for up to six years in England and Wales (five in Scotland). That protection exists whether the dealer offers a warranty, refuses one, or charges you extra for one. The law is the floor. The warranty is decoration on top.

What a 3-Month Warranty Actually Is

A dealer warranty is a contract — either a promise the dealer makes directly, or more often an insurance-style policy from a third-party warranty company. Because it's a contract, its terms are whatever the paperwork says, and the paperwork is where these products earn their keep. Typical three-month used car warranties come with claim caps (often £500 or £1,000 per claim — less than a modern gearbox), excluded components, wear-and-tear carve-outs broad enough to argue almost anything into, service-history conditions, and a requirement to use the dealer's chosen garage.

None of that is illegal. A warranty can be as narrow as its writer likes, precisely because it's a bonus sitting on top of statutory rights, not a substitute for them. What section 31 of the Consumer Rights Act does make unenforceable is any attempt to use the warranty to limit your legal rights — "your only remedy is under the warranty" is not a term a trader can enforce, however firmly it's printed.

There's one useful thing a warranty tells you before anything goes wrong: a dealer offering a longer, more open warranty is signalling confidence in the car. A dealer pushing an extended warranty at extra cost, on the other hand, is selling you a product — usually one with a healthy commission attached.

"Your Warranty's Expired" — Why That Changes Almost Nothing

Here's the scenario the 3-month figure is built for: the gearbox starts slipping in month four, and the dealer shrugs — "warranty's run out, mate, nothing we can do."

What's actually true: the warranty has expired. Your Consumer Rights Act protection has not — at month four you're inside the six-month window where a fault is legally presumed to have been present when you bought the car, and it's the dealer's job to prove otherwise, not yours. You can require a repair at the dealer's cost, and reject the car if that repair fails. The warranty's expiry date has precisely no bearing on any of it.

The same logic applies to the 6-month warranty variant, and to cars sold with the tail end of a manufacturer's warranty. These are all just contracts with dates on them. The Act doesn't read their calendars.

Warranty Claim or Consumer Rights Act Claim?

Since the two exist side by side, you choose which to use. The short version: the warranty is for small stuff on an older car (quick claim, no argument about proof), and the Act is for anything serious — no claim caps, no excluded-parts list, no excess, and remedies no warranty offers, including rejecting the car outright. If a fault appears in the first 30 days, don't even open the warranty booklet. We've written a full comparison of dealer warranties vs your statutory rights with worked examples of when each wins.

The one trap to avoid: letting a warranty claim quietly reframe your situation. A major fault at week three handled "under warranty" through the dealer's process can eat weeks of your strongest legal window while the courtesy phone calls roll on. If the fault is significant, state in writing from the start that you're claiming under the Consumer Rights Act — you can still let them repair it, on the Act's terms rather than the warranty's, with your right to reject intact if the fix fails.

What About "Sold as Seen" or "No Warranty Given"?

A dealer can sell without a warranty; what they can't do is use those words to escape the law. "Sold as seen", "trade sale, no comebacks" and similar phrases have no legal effect on a consumer sale by a trader — section 31 again. A dealer who refused to offer a warranty still owes you a car of satisfactory quality, and still faces rejection, repair and refund claims if it isn't. (Genuine private sales are the exception — no Act protection and no warranty either, which is priced into private sale values.)

The Bottom Line

Treat a used car warranty as what it is: a convenience for small claims and a confidence signal about the car — never the measure of your rights. When something serious goes wrong, the question isn't "am I still under warranty?" It's "am I inside 30 days, inside 6 months, or beyond?" — because that's the clock the law actually runs on.

If your used car has developed a fault the dealer's waving away — warranty or not — our free eligibility check will tell you exactly where you stand under the Act, in about three minutes.