The biggest mistakes when buying a used car are skipping a vehicle history check, trusting the seller's word over the paperwork, and letting a tempting price rush you into a decision. Most expensive problems in the UK, such as hidden finance, insurance write-offs and clocked mileage, can be spotted before you hand over any money if you know where to look.
Here are the nine mistakes to avoid, and what to do instead.
1. Not checking the vehicle history
A car can look spotless and still have a troubled past. A history check can flag several things you cannot see on a viewing:
- Insurance write-off records (MIAFTR categories A, B, S and N)
- Police National Computer (PNC) stolen markers
- Outstanding finance recorded against the car
- Mileage inconsistencies and previous keeper changes
Before you travel to view a car, take a minute to check its registration on motorpeek.com. We are an independent service, not affiliated with the DVLA or any government body, and no check can guarantee a car is problem-free. But it helps you spot red flags early and ask better questions.
2. Ignoring write-off categories
Not every written-off car is a bad buy, but you should know exactly what you are looking at. Categories A and B are scrap or break-only and should never return to the road as a whole car. Category S (structural damage) and Category N (non-structural damage) can be repaired and driven again. They are often worth less, can be harder to insure or resell, and the quality of repair varies a lot. If a seller has not mentioned a write-off, ask why.
3. Forgetting about outstanding finance
If a car was bought on finance that has not been settled, the finance company may still have a claim on it, even if you paid the seller in full. This is one of the most expensive mistakes a buyer can make. Check for finance markers before you pay, and be wary of any seller who is vague about how they own the car.
4. Trusting the mileage on the dashboard
Clocking, where the odometer is wound back, still happens. Compare the dashboard figure with the MOT history, which records the mileage at each test. A drop, a long gap, or a suspiciously low annual average deserves questions. Also check whether wear on the pedals, steering wheel and driver's seat matches the claimed mileage.
5. Not reading the MOT history properly
A current MOT is not a guarantee of condition, because it only reflects the car on the day of the test. Look at the full online MOT history instead. Repeated advisories for corrosion, brakes or suspension, or a failure followed by a quick pass, can tell you what is likely to need money spent on it soon.
6. Skipping the V5C and paperwork checks
Always ask to see the V5C logbook and check that:
- The seller's name and address match the document
- The registration, VIN and engine number match the car
- The number of previous keepers fits what you were told
Be cautious if the seller has no V5C, says it is in the post, or is selling from a location that is not the registered address. Also ask for the service history and receipts for major work such as a cambelt change.
7. Rushing the viewing and test drive
View the car in daylight and dry weather, and start it from cold if you can. Check for uneven panel gaps, mismatched paint, warning lights, unusual noises and smoke. On the test drive, try different speeds and road types, and check the brakes, clutch and steering. Never feel pressured by a story about other buyers on their way.
8. Paying in a risky way
Avoid handing over large amounts of cash or paying a deposit to a seller you have not met. If you can, pay by a traceable method. Credit card payments between £100 and £30,000 may give extra protection under Section 75 of the Consumer Credit Act, though the details depend on how you pay. Get a written receipt that shows the car's details and the seller's name and address.
9. Not knowing your rights
Your rights depend on who you buy from. Buying from a dealer, you are covered by the Consumer Rights Act 2015, which includes the right to expect the car to be of satisfactory quality, fit for purpose and as described. Private sales give you much less protection. The car must be as described and the seller must have the right to sell it, but it is largely buyer beware. That is why checks beforehand matter so much.
A quick checklist before you buy
- Run a vehicle history check on the registration
- Review the full MOT history and mileage record
- See the V5C and match the details to the car
- Test drive and inspect it in good light
- Pay traceably and keep written proof of the sale
If anything does not add up, or the seller's story keeps changing, walk away. There are plenty of other cars for sale, and a few minutes of checking can save you from a very costly mistake.
Frequently asked questions
What should I check before buying a used car?
Start with a vehicle history check covering write-off records, stolen markers, outstanding finance and mileage. Then review the online MOT history, inspect the V5C logbook, and view and test drive the car in good light. Checks reduce risk but cannot guarantee a car is free of problems.
Can I buy a car that has outstanding finance?
It is risky, because the finance company may still have a legal claim on the car even if you paid the seller. You should check for finance markers before paying, and walk away if the seller cannot clearly explain the situation. If finance is involved, it needs to be settled properly before the car changes hands.
Is it safe to buy a Cat S or Cat N car?
Cat S and Cat N cars can be repaired and legally driven, but they usually sell for less and can be harder to insure and resell. The quality of repairs varies, so ask for repair evidence and consider an independent inspection. Cat A and Cat B cars should not be bought as roadworthy whole vehicles.