Buying a Used Car: 12 Checks to Run Before You Pay a Penny

The UK used car market shifts about 7 million vehicles a year. Most transactions go fine. A meaningful minority do not, and the buyer ends up out of pocket by anything from a few hundred pounds to the full purchase price. The good news is that the majority of dud cars give themselves away if you know exactly what to look at.

This is the checklist we would run through ourselves before handing over money. It is not exhaustive. It is the 12 things that catch 90% of problems for 10% of the effort.

1. Run the registration before you even view it

Before you arrange a test drive, run the registration through a free check. Our free vehicle lookup returns the make, model, colour, fuel type, year, current MOT and tax status, and the full MOT history. Everything in that report should match what the seller has advertised.

Common mismatches that should make you walk away:

• The advert says 2018 but the DVLA record says 2017. The seller is rounding up. Ask why.
• The advert says blue but the DVLA says white. The car has been resprayed. That is not always sinister, but combined with bodywork repairs it can hide accident damage.
• The advert says 1.6 petrol but the DVLA record shows 1.6 diesel. Walk away. The car has either been heavily modified or the seller is reading off the wrong V5C.

2. Check for outstanding finance

Any car bought on finance technically belongs to the lender until the loan is paid off. If the seller has not cleared the finance and you buy the car anyway, the lender can repossess it from your driveway and you have no legal recourse against them. You can chase the seller in the small claims court, but you might not see the money for months, if ever.

A finance check costs about £10 from any of the standard providers (HPI, MyCarCheck, Carcheck). Some banks include free checks with current accounts. Always run one before completing on a car worth more than £2,000. The check will also flag if the car has been written off, stolen, or has a logbook mismatch.

3. Verify the MOT history

The MOT history is one of the most useful free tools the DVSA gives buyers. Run our free MOT check and look for:

• Mileage continuity. Each test should record a higher mileage than the one before. A drop is a giant red flag for clocking.
• Failure pattern. Recurrent failures on the same items (suspension, emissions, brakes) suggest a car that needs ongoing money to keep on the road.
• Advisory build-up. Repeated advisories that get ignored year after year tell you the car has been run on a budget.
• Long gaps. A two-year gap usually means the car was SORN. Ask why and check the explanation matches the seller's story.

We covered the tell-tale signs of clocking in our how to spot a clocked car guide if you want the full method.

4. Match the V5C to the car and the seller

When you arrive to view the car, ask to see the V5C logbook. Three things to check:

• The VIN on the V5C matches the VIN stamped on the car (visible through the windscreen at the bottom of the dashboard, and also stamped on the chassis under the bonnet). Forging a V5C is much easier than re-stamping a VIN, so this is one of the strongest fraud filters.
• The registered keeper's name and address match the seller. If the seller is not the named keeper, ask why. "I am selling it for my mate" or "It is on my dad's name" is a classic dodge for stolen cars or finance frauds.
• The watermark is correct. Genuine V5Cs have a "DVL" watermark visible when held to the light. Modern V5Cs are pink and red. If you are handed a blue or green one, it is decades old or a fake.

5. Cold-start the engine

A cold engine reveals more faults in the first 30 seconds than a warm one will hide for the next two hours. When you arrive, insist the bonnet is cold before you start the test drive. If the seller has already warmed it up, that is a red flag. Common reasons to warm a car before a viewing include:

• Hiding a noisy timing chain or worn cam followers.
• Hiding white or blue smoke from the exhaust, which usually fades after a few minutes.
• Hiding a difficult cold start that points to glow plug or compression issues.
• Hiding rough idle from misfiring cylinders.

A genuine seller has no reason to pre-warm. If they insist, come back the next day and ask them to leave it overnight.

6. Walk around the body in good light

Stand at the corner and look down the side of the car. Panels should reflect light evenly. Look for:

• Mismatched paint between adjacent panels. Easy to spot in low sun.
• Overspray on rubber seals, plastic trim or the underside of the bonnet hinge.
• Uneven panel gaps. The bonnet, doors and tailgate should sit flush with consistent gaps. A panel that is 5mm out has been replaced after a crash.
• Rust around the wheel arches, sills and tailgate. Surface rust is normal on older cars; bubbling paint or holes are not.

7. Push down hard on each corner of the car

Each corner should bounce once and settle. Two or more bounces means worn shock absorbers, which is an MOT failure waiting to happen and an annoying repair bill of £200 to £500.

While you are down there, check tyre wear. Even wear across the tread means correct tracking. Worn on the inside or outside means tracking is out, which is cheap to fix but can also signal worn suspension bushes. Worn down the centre or worn at the edges only suggests over- or under-inflation, which is a maintenance neglect signal.

8. Test every electrical thing

Sit in the driver's seat and methodically work through every button. It is tedious but it takes five minutes and saves four-figure repair bills.

• All windows up and down, both directions.
• All seat motors (forward, back, height, recline).
• Heated seats, heated steering wheel.
• Air-con on cold for at least five minutes (lukewarm air means re-gas needed; no cold air means probably a compressor failure).
• Heater on hot.
• Every light: indicators, headlights on dipped and main, fogs, rear lights, brake lights (have a friend stand behind), reversing lights.
• Wipers on every speed plus washers.
• Heated rear screen.
• Stereo and Bluetooth pairing.
• Sunroof if fitted.

Anything that does not work is either a bargaining chip or a reason to walk.

9. Look at the tyres carefully

Four matching, modern tyres at 4mm or more of tread is the gold standard. Anything less is a cost in your near future:

• All four different brands suggests a tight-budget owner who replaces individual tyres as they pop. Likely the car has been run hard.
• One brand-new tyre and three worn ones can mean a recent puncture or it can mean a recent crash. Ask.
• Tread below 3mm. The legal minimum is 1.6mm but performance falls off a cliff below 3mm. Budget £80 to £150 per tyre for replacement.
• Cracking sidewalls. The tyre is old (more than 7 years) regardless of tread. Check the four-digit date code on the sidewall. "2117" means week 21 of 2017.

10. Take it on a proper test drive

Twenty minutes minimum. Mix of speeds. Critical bits:

• Pull away in second gear from a standstill (manual cars). The clutch should bite cleanly. If it slips or judders, the clutch is on its way out. £700 to £1,200 to fix.
• Brake hard from 40 mph in a straight line. The car should stop without pulling left or right. Pulling means a sticky calliper or uneven pad wear.
• Listen at 30 mph with the windows down. Knocks, clunks or droning suggest worn suspension or wheel bearings.
• Cruise at motorway speeds for a few miles. Vibrations in the steering wheel point to wheel balancing or worn suspension.
• Check for warning lights. The dashboard should be clear. A fault that comes on after 10 miles of driving is far more telling than one that is already on when you arrive.

11. Check the service history honestly

A genuine service history is gold. Look for:

• Stamps in a service book matching dated invoices, especially for major services.
• Cambelt or timing chain change record if the car is over the manufacturer's interval. Skipping this is a £2,000+ engine grenade waiting to go off.
• Oil change frequency that matches the manufacturer's schedule.
• Garage names that exist. Anyone can stamp a service book; phone the garage and ask if they actually saw the car.

"Sold as no service history" is fine on a £1,500 banger. On a £15,000 car, it is a 10% to 20% deduction off market value at minimum.

12. Settle on price by walking away first

Once you have run through the checks, find at least two faults you are willing to live with and use them to negotiate. Then walk away to "think about it". Sellers who refuse to drop their price by even £100 over a real fault are usually struggling to let it go because they paid too much themselves.

If the seller is willing to negotiate sensibly, that is a good sign that the car is honestly priced. If they are aggressively defending every penny, ask yourself why.

Final paperwork once you have agreed

When you actually buy:

1. Pay by bank transfer, not cash. There is a paper trail.
2. Get a written receipt with both addresses, the registration, the VIN, the price, and "sold as seen, tried and approved without guarantee" if you are buying private (this protects the seller, but is standard).
3. Take the V5C green slip (V5C/2) from the seller. They keep the rest of the V5C and notify the DVLA. You cannot tax the car without that green slip.
4. Insure before driving away. Even five minutes on the road uninsured is an automatic £300 fixed penalty and six points.
5. Tax the car on GOV.UK using the green slip number. Our tax a car guide walks through it.
6. Set up an MOT and tax reminder so the renewal does not catch you out.

A diligent half-hour with this checklist filters out almost every car that would cause real grief. The cars that pass are not always perfect, but you will know what you are getting and have priced it accordingly. That is the entire game in used cars.