Buying a used car is one of the biggest purchases most people make outside of property. Asking the right questions before you commit can reveal hidden problems, avoid costly mistakes, and give you negotiating power. Here are 20 questions you should ask every seller.

About the Car's History

1. Why are you selling? The answer reveals a lot. Upgrading is normal. Selling because of reliability issues is a red flag. Listen carefully and read between the lines.

2. How long have you owned it? A very short ownership period (under 6 months) could indicate the seller discovered a problem and wants to pass it on.

3. How many previous owners has it had? Fewer owners generally means better care. A car with 5 owners in 4 years raises questions about why nobody kept it.

4. Has it been in any accidents? Ask directly. Even repaired accident damage can affect a car's value, structural integrity, and insurance cost. Check the bodywork for mismatched paint, uneven panel gaps, and signs of filler.

5. Is there any outstanding finance on the car? If the car has outstanding finance, the finance company legally owns it. If you buy it, they can repossess it from you. Always run an HPI check to verify.

About Maintenance and Condition

6. Is the service history complete? A full service history (FSH) adds significant value and proves the car has been maintained. Gaps in the service history reduce value and raise questions.

7. When was the last service? If the car has not been serviced recently, factor the cost of a service into your offer.

8. Has it had any major work done? Ask about timing belt/chain replacement, clutch, gearbox, turbo, suspension, or any other significant repair. This tells you what has been addressed and what might be due soon.

9. Are there any known faults or issues? Ask directly. An honest seller will disclose known problems. Evasive answers are a red flag.

10. When does the MOT expire? Check the MOT status and history for free at gov.uk/check-mot-history. Look at recent advisories — these are items that may need attention soon.

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About the Practical Details

11. What are the MOT advisories? Advisories are not failures, but they indicate items that may need work in the near future. Use them as negotiation points.

12. Has it had any modifications? Modifications can affect insurance cost, reliability, and resale value. Ask about any changes from the original specification.

13. How many keys are there? Replacing a lost key can cost £200–£500 depending on the car. Two keys are expected; one key is a negotiation point.

14. Is the V5C (logbook) in your name? The V5C should be in the seller's name and match their address. If it is not, this could indicate the seller is not the legal keeper, which is a significant risk.

15. Is the mileage genuine? Ask directly and check the MOT history for consistency. Mileage should increase steadily year on year. A sudden drop between MOTs indicates potential clocking.

About Running Costs

16. What fuel economy do you actually get? Real-world MPG often differs from official figures. Ask the seller what they achieve in their typical driving.

17. What insurance group is it in? Higher insurance groups mean higher premiums. Check this before buying, especially if you are a young or new driver.

18. How much is the road tax? VED rates vary significantly. Check the exact amount at gov.uk/check-vehicle-tax.

About the Sale

19. What is your best price? Always negotiate. Most private sellers price their car with room for negotiation. Use any issues discovered during your inspection as leverage.

20. Can I have it independently inspected? A reputable seller will have no objection to an independent inspection. If they refuse, walk away. The AA and RAC both offer pre-purchase inspection services.

Pro Tip: Ask these questions by phone or message before visiting. This saves you a wasted journey if the answers raise red flags. If the seller is evasive or reluctant to answer, that tells you everything you need to know.

Final Thoughts

These 20 questions are your first line of defence against buying a problem car. They cost nothing to ask, and the answers — or the refusal to answer — can save you thousands of pounds. Always combine your questions with a thorough physical inspection and an independent vehicle check.

Frequently Asked Questions

Ask key questions (why selling, mileage, any known faults, outstanding finance) by phone or message before visiting. This saves a wasted trip. Save detailed questions about condition and history for the viewing when you can verify the answers.
Evasive or defensive responses are a red flag. A genuine seller with nothing to hide will answer reasonable questions openly. If a seller refuses to answer or becomes hostile, walk away. There are plenty of other cars available.
Yes. An HPI check (or equivalent vehicle check from providers like Experian or the DVLA) costs around £10–£20 and reveals outstanding finance, write-off history, mileage discrepancies, and theft markers. It is one of the best investments you can make when buying used.
It is not uncommon, but it is a negotiation point. Replacing a lost car key can cost £200–£500 depending on the vehicle. Factor this into your offer price if only one key is available.
Check the MOT history at gov.uk/check-mot-history. The mileage recorded at each MOT should increase consistently year on year. Any sudden decrease is a strong indicator of mileage tampering (clocking). Also compare the mileage with the car's general condition and wear.

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