10 Things to Check Before Buying a Used Car in the UK

Buying a used car is one of the biggest purchases most people make outside of a house. Get it right and you'll drive away with a reliable motor at a fair price. Get it wrong and you could inherit someone else's expensive problem — outstanding finance, hidden accident damage, a clocked odometer, or mechanical issues that cost more than the car is worth.

The good news is that the vast majority of problems are avoidable if you know what to check. This guide covers the ten essential checks every UK buyer should complete before handing over any money — whether you're buying from a dealer, a private seller, or online.

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1. Run a Vehicle History Check

This is the single most important thing you can do before buying any used car. A vehicle history check (sometimes called an HPI check) searches national databases and reveals information the seller may not tell you — or may not even know about.

What a vehicle history check reveals:

• Outstanding finance — if there's still money owed on the car, the finance company can legally repossess it from you, even if you paid the seller in full
• Insurance write-off history — categories S and N mean the car was previously damaged enough that an insurer decided not to repair it (or the repair wasn't economical)
• Stolen status — the police national computer flags vehicles reported stolen
• Mileage discrepancies — cross-references the odometer reading against MOT records to spot clocking
• Number plate changes — multiple plate changes can indicate an attempt to disguise the car's history
• VIN and engine number verification — confirms the car is what the seller says it is

A basic check costs around £10–£20 from providers like HPI, AutoTrader, or RAC. On SortedCars, every listing includes a SortedCheck so you don't have to pay separately.

2. Check the MOT History

Every car over three years old needs an annual MOT test, and every result since 2005 is stored on the GOV.UK MOT history checker. This is a goldmine of free information that most buyers never look at.

Go to gov.uk/check-mot-history and enter the registration number. You'll see:

• Pass/fail history — repeated failures suggest poor maintenance
• Advisory notices — these are items the tester flagged as approaching failure. If the same advisory appears year after year without being fixed, the seller is cutting corners
• Mileage at each test — this creates a mileage trail. If the mileage drops between tests, the odometer has been tampered with
• Dangerous defects — any past dangerous items should have been addressed

3. Verify the V5C Logbook

The V5C is the vehicle registration document — the main piece of paperwork that links a car to its registered keeper. It is not proof of ownership (a common misconception), but it is essential.

Check these things on the V5C:

• Seller's name and address match — if they don't, ask why. There could be a legitimate reason (recently moved house) or a dodgy one (they're not the registered keeper)
• VIN number matches the car — the Vehicle Identification Number on the V5C should match the one on the car's chassis plate (usually visible at the base of the windscreen on the driver's side, and on a plate in the engine bay or door frame)
• Document condition — a brand-new V5C on an old car could mean a replacement was requested to cover up a change of details
• Watermark and hologram — genuine V5Cs have a watermark visible when held up to light and a hologram on the front

4. Inspect the Bodywork

A careful exterior inspection can reveal accident damage, poor repairs, and rust that the seller hopes you won't notice. Do this in daylight, ideally on a dry day when the car is clean.

• Panel gaps — crouch down at each corner of the car and sight along the body panels. Uneven gaps between panels suggest crash repair
• Paint mismatch — look at each panel from an angle. Different shades, orange-peel texture, or overspray on rubber seals indicate repainting
• Rust — check the wheel arches, sills, door bottoms, and around the boot seal. Surface rust can be cosmetic, but bubbling paint means structural corrosion underneath
• Shut lines — open and close every door, the boot, and the bonnet. They should all open smoothly and close with the same effort
• Glass — check all windows and the windscreen for chips and cracks. A chipped windscreen can be an MOT failure and costs £50–£350 to fix

5. Check Under the Bonnet

You don't need to be a mechanic to spot the basics. Pop the bonnet and look for these things:

• Oil level and colour — pull out the dipstick, wipe it, dip it again and check. The oil should be between the min and max marks. Black oil is normal on a diesel. Milky, frothy oil on a petrol could mean a head gasket problem
• Coolant level — the expansion tank should be between the min and max marks. Do NOT open it when the engine is hot. Brown or oily coolant is a bad sign
• Belts and hoses — visible belts should be free of cracks. Hoses shouldn't be brittle or swollen
• Leaks — look underneath the car for fresh drips on the ground. Oil, coolant, or brake fluid leaks are all red flags
• Battery condition — heavy corrosion on the terminals suggests the battery is old and may need replacing soon
• General cleanliness — a steam-cleaned engine bay on an old car could be hiding leaks. Equally, filth everywhere might indicate neglect

6. Inspect the Interior

The interior tells you a lot about how the car has been treated — and whether the mileage is genuine.

• Wear patterns — heavily worn driver's seat bolsters, a shiny steering wheel, and scuffed pedal rubbers on a car claiming 30,000 miles suggest the real mileage is much higher
• Dashboard warning lights — turn the ignition to the "on" position (don't start the engine). All warning lights should illuminate briefly then go out. If the engine management, airbag, or ABS light stays on, there's a fault
• Electrics — test everything: windows, mirrors, heated seats, air conditioning (both hot and cold), infotainment screen, Bluetooth, reversing camera, parking sensors
• Damp and smell — lift the boot carpet and check for damp. A musty smell or misted windows could indicate a water leak or blocked drainage channels
• Seat adjustment — electric seats should move smoothly in all directions. Manual seats should slide and recline without sticking

7. Check the Tyres

Tyres are one of the most overlooked checks, yet they reveal a lot about the car and can be an immediate bargaining point.

• Tread depth — the legal minimum in the UK is 1.6mm across the central three-quarters of the tyre. Use a 20p coin: insert it into the tread groove. If you can see the outer band of the coin, the tyre is below the legal limit. Each tyre below the limit is a £2,500 fine and 3 penalty points in the UK
• Matching brands — ideally all four tyres should be the same brand and model. Mismatched budget tyres on a premium car suggest cost-cutting
• Uneven wear — wear on one edge of the tyre suggests alignment issues, which could point to suspension damage or a previous accident
• Age — even with good tread, tyres over five years old lose grip. Check the DOT code on the sidewall — the last four digits show the week and year of manufacture (e.g., 2522 means week 25 of 2022)
• Spare wheel — check if there's a spare or space-saver, and that it's inflated. Many modern cars only have a puncture repair kit

8. Take a Proper Test Drive

A test drive isn't just about seeing if you like the car — it's a diagnostic tool. Here's how to do it properly:

Before you start:

• Arrive without warning if possible — a cold engine reveals problems that a pre-warmed engine hides
• Check for smoke on startup (blue = burning oil, white = head gasket, black = running rich)
• Listen for rattles, knocks, or ticking on cold start

On the road:

• Gearbox — every gear should engage smoothly. Crunching into second or third suggests synchromesh wear. For automatics, check for hesitation or jerky shifts
• Brakes — should feel firm (not spongy) and pull the car straight. Vibration through the pedal means warped discs
• Suspension — drive over speed bumps and listen for knocks. The car should feel composed, not wallowy or crashy
• Steering — should be smooth with no play. On a straight road, briefly release the wheel — the car shouldn't pull to one side
• Engine — should pull cleanly through the rev range without misfires, flat spots, or excessive noise
• Motorway speed — if possible, get up to 60–70mph to check for vibrations, wind noise, and stability

9. Verify the Asking Price

Before you even go to view the car, you should know what it's worth. Overpaying is one of the most common mistakes, and it's the easiest one to avoid.

• AutoTrader valuation — use the AutoTrader valuation tool and search for identical models (same year, mileage, spec) currently listed. This shows you the real market price
• CAP HPI — the industry-standard valuation used by dealers and insurers
• SortedCars — browse SortedCars listings to compare prices on verified cars with vehicle history checks included

Things that affect the price:

10. Check the Paperwork

Before you commit to buying, make sure all the paperwork is in order. Missing documents are a negotiation point at best and a red flag at worst.

• Service history — a full, stamped service book with matching receipts is the gold standard. Manufacturer stamps (main dealer) add more value than independent garage stamps, but any consistent history is better than none
• MOT certificates — while these are available online, having the physical certificates shows the seller keeps good records
• Receipts for work done — timing belt changes, brake replacements, and other major work should have receipts. If the seller claims the timing belt was done at 60,000 miles but has no receipt, assume it wasn't
• Spare key — replacing a modern car key costs £150–£400 depending on the make. If there's only one key, factor this into your offer
• Owner's handbook — not essential, but its presence suggests the car has been well looked after
• HPI or vehicle check certificate — if the seller has already run one, ask to see it. If they haven't, run your own via SortedCheck

Final Thoughts

None of these checks is difficult, and together they take less than an hour. That hour could save you from buying a car with outstanding finance (which can be repossessed), hidden accident damage (which affects safety and resale value), or mechanical problems that cost more to fix than the car is worth.

If you find issues, don't automatically walk away — use them as leverage to negotiate a better price. But if the seller is evasive about the history, won't let you get a vehicle check, or pressures you to decide quickly, walk away. There's always another car.

The best way to buy with confidence is to do your homework before you view, check everything on this list during the viewing, and never let anyone rush you into a decision.

This guide is for general information only. For complex disputes, contact Citizens Advice or a qualified solicitor. Your statutory rights under the Consumer Rights Act 2015 apply when buying from a dealer.

Related reading: How to Negotiate a Used Car Price | Car Finance Claim Deadline June 2026