Can you reject a used car after 6 months? What changes once the easy refund window has gone
A fault showing up half a year into used-car ownership feels especially nasty because it lands right after the simple headlines stop being useful. By that point, most buyers have heard that there is a 30-day right to reject, but they are much less clear on what happens after that, and many assume six months is a hard legal cut-off.
It is not that simple.
If you bought the car from a dealer, the Consumer Rights Act 2015 still matters after six months. What changes is the argument. The case usually shifts away from a quick rejection and towards evidence: what was wrong, when it started, whether the fault was really there in some form from the outset, and whether the dealer already had a fair chance to repair it.
Quick answer
Yes, you may still be able to reject a used car after six months, but it is usually harder than it would have been earlier.
For a dealer sale, the legal route does not disappear the moment month seven begins. What changes is that the helpful six-month presumption in section 19 of the Consumer Rights Act no longer does the heavy lifting for you. After that point, you are more likely to need stronger evidence that the car did not conform to the contract when it was supplied.
In practice, that means:
- the 30-day short-term right to reject has normally gone
- the dealer will usually argue for repair history, wear and tear, mileage, age and later use to be taken into account
- you may still have a final right to reject or a right to a price reduction if the legal conditions are met
- an inspection report, diagnostic evidence and a tidy paper trail matter much more
Start with the basic question: who sold you the car?
This is the fork in the road too many people miss.
If you bought from a motor trader, dealership or other business seller, the Consumer Rights Act 2015 applies. The car must be of satisfactory quality, fit for purpose and as described.
If you bought privately, the position is much weaker. The car usually only has to match its description and the seller must have had the right to sell it. Private sales do not give you the same dealer-backed safety net.
So if you are asking whether you can reject a used car after six months, the first thing to establish is whether this was a trader sale or a private one.
What the first 30 days gave you that you no longer have
Sections 20 and 22 of the Consumer Rights Act create the short-term right to reject. In plain English, that is the cleanest refund window. If the car does not conform to the contract, the consumer can normally reject it within 30 days.
That matters because once that initial window has passed, the law usually moves away from a straight refund-first approach. The usual next step is repair or replacement.
This is why buyers who are already beyond six months should stop relying on generic "you have 30 days" advice. That part is relevant background, but it is no longer the live issue.
Why the six-month mark matters
The important bit sits in section 19 of the Consumer Rights Act.
Section 19(14) says that if goods fail to conform to the contract at any time within the first six months after delivery, they are taken not to have conformed at delivery too, unless the trader proves otherwise or that presumption does not fit the nature of the goods or fault.
For used-car buyers, that is a very useful legal push. It means the argument is not automatically on your shoulders during that first six-month period.
After six months, that presumption no longer helps in the same way.
That does not mean your rights vanish. It means the dealer has much more room to argue that:
- the fault developed later
- the issue is wear and tear rather than an underlying defect
- your use, mileage or maintenance contributed to the problem
- the car was reasonable for its age, mileage and price when supplied
So the real six-month change is about proof, not the total disappearance of legal protection.
Can you still get a refund after six months?
Possibly, yes, but usually not by jumping straight to "I want my money back" without groundwork.
Section 23 gives the trader the right to repair or replace within a reasonable time, without significant inconvenience to the consumer and without necessary cost to the consumer. Section 24 then allows for a price reduction or final right to reject in certain circumstances, including where a repair or replacement has failed, cannot be provided, or has not been carried out within a reasonable time and without significant inconvenience.
That is the route many late-stage used-car disputes turn on.
So if your car develops a serious fault after six months, the useful question is often not "Have I missed the deadline forever?" but this one:
Can I show that the car was not up to the required standard when sold, and has the dealer already had a fair chance to sort it?
If the answer is yes, a refund can still be on the table. But it is usually a more evidence-heavy argument than it would have been earlier.
The problem with "wear and tear"
This is where a lot of disputes get messy.
Citizens Advice notes that you will not normally be entitled to a remedy if the fault is normal for how much the car has been used, and it gives brake-pad wear as the obvious example. That is sensible enough. Used cars are not new cars.
The difficulty is that dealers sometimes lean on "wear and tear" too casually. A worn consumable is one thing. A significant engine, gearbox, electronics or structural problem that points to an underlying issue is another.
A six-month-old ownership timeline does not automatically turn a serious fault into ordinary wear.
What kind of evidence helps after six months?
This is the stage where your case needs substance.
The most useful evidence often includes:
- the advert and saved screenshots
- the invoice and order form
- any written promises about condition, service history or recent work
- fault codes, diagnostic printouts and repair estimates
- an independent inspection report explaining whether the fault looks longstanding or inherent
- your servicing records and proof the car was not neglected after purchase
- photos or video of symptoms, warning lights or repeat failures
- a timeline showing when you first reported the issue
If an independent garage is involved, ask for clear written wording rather than a vague chat at the service desk. "Turbo failed" is less useful than "Turbo failure appears linked to pre-existing oil starvation or longstanding wear not consistent with normal use over this short ownership period."
Common situations where buyers still have a real argument
A major fault appears soon after the six-month point
If the issue shows up at month seven, month eight or even a little later, that does not make it untouchable. In fact, the timing can still support your case if the failure looks like the end result of an older underlying problem.
The dealer has already attempted a repair and the same fault returns
This can be important under section 24. If the dealer had its chance and the problem comes back, the path towards a final right to reject or price reduction may look stronger.
The car was misdescribed
If the dispute is about what the car was said to be, not just how it later performed, you may still have a strong argument. A falsely claimed full service history, undisclosed accident history, or wrongly described feature set can matter well beyond the early weeks.
A finance agreement is involved
If the car was bought on PCP, HP or another regulated finance arrangement, do not forget the lender. Depending on the setup, the finance company may be part of the complaint picture, not just the dealer. We have covered that separately in our guide to faulty used cars on finance.
When your case is weaker
Not every late fault creates a strong rejection claim.
Your argument is usually weaker where:
- the car is older, cheaper and high-mileage, and the problem fits ordinary age-related deterioration
- the issue is a routine wear item
- there is evidence of missed maintenance after purchase
- you carried on driving a clearly sick car and made the damage worse
- the fault was pointed out before sale
- the sale was private, not dealer-backed
That does not mean you should give up automatically. It means you should be realistic about the gap between a frustrating bill and a legally strong rejection case.
What to do if your used car develops a fault after six months
1. Stop improvising on the phone
Get the facts straight first. Dealers are much easier to deal with when the complaint arrives as a clear written case rather than an angry call with half the details missing.
2. Write to the selling dealer promptly
Set out:
- when you bought the car
- the mileage then and now
- the fault
- when it started
- what diagnosis you have so far
- what remedy you are asking for
Keep the tone firm and factual.
3. Refer to the Consumer Rights Act properly
Do not just write "I know my rights". Say that you are alleging the vehicle did not conform to the contract under the Consumer Rights Act 2015, and explain why.
4. Get an independent opinion if the dealer disputes the fault
After six months, this is often the difference between a credible case and a hand-wavy one.
5. Check whether the dealer belongs to a trade body or ADR scheme
If the dealer is signed up to The Motor Ombudsman or another dispute-resolution route, that can help if the complaint stalls.
6. In finance cases, complain to the lender too
Do not assume the finance company is a bystander. If the agreement is regulated, it may have its own obligations in the dispute.
Will the dealer be allowed to deduct for your use?
Potentially, yes.
That is another reason late rejection is not the same as early rejection. The Motor Ombudsman notes that after the first 30 days, where matters move to the later remedies, a refund can involve a deduction for the use you have had from the car.
So even if you do win the argument after six months, do not assume the outcome will always be a full refund exactly matching the original price.
The mistake that costs buyers most
The biggest mistake is waiting too long to create evidence.
Drivers often spot a problem, hope it goes away, get a verbal opinion from a local garage, keep using the car, then finally try to reject it weeks later with no proper diagnosis, no written complaint and no saved advert.
That is exactly how a potentially decent case turns flimsy.
Bottom line
Yes, you can still reject a used car after six months in the UK, but you are no longer in the easy part of the argument.
The short-term refund window has normally gone, and the six-month legal presumption is no longer doing the hard work for you. What matters then is whether you can show the car failed to meet the standard required by the Consumer Rights Act when it was sold, and whether the dealer has already had a fair opportunity to put things right.
If the fault looks serious, longstanding or badly handled, do not write the case off just because the calendar has moved on. But do treat it like an evidence job, not a slogan job.
