Used car checks before you buy: the full checklist

Buying a used car is mostly an exercise in not being rushed. The seller wants a quick, trusting transaction; your job is to slow it down and run the checks. The good news: most of them are free, take minutes, and can be done before you so much as turn the key. Here’s the full list, in the order that saves you the most wasted trips.

Before you leave the house (free, 10 minutes)

You can reject a lot of bad cars from the sofa, using only the registration number from the advert.

1. Check the MOT history. Go to gov.uk/check-mot-history and read every test. Look for repeated advisories, a pattern of fails, and — most importantly — that the mileage climbs steadily and never drops. We’ve written a full guide to reading MOT history if you want the detail. This single check catches clocked cars, neglected cars and the wrong number plate.

2. Check tax and MOT status. gov.uk/check-vehicle-tax confirms whether it’s taxed and when the MOT expires — useful for knowing what you’re taking on.

3. Confirm the basics match the advert. The MOT check shows the make, model, colour and engine size on record. If the advert says one thing and the DVLA says another, stop there.

4. Consider a paid history (HPI) check. For around £10–£20 a vehicle history check reveals what MOT data can’t: outstanding finance, insurance write-off (Category S/N), stolen markers, plate/colour changes and mileage discrepancies. On any car worth real money, this is the cheapest insurance you’ll buy. Never pay a deposit before it clears — a car on finance isn’t the seller’s to sell.

The paperwork to demand in person

When you go to view, the documents tell you as much as the metal.

• V5C logbook — confirm the seller’s name and address match where you’re standing, and that the document reference number isn’t on the DVLA’s lost/stolen list. The V5C is not proof of ownership, but a mismatch is a serious red flag.
• Service history — the folder of invoices and/or the stamped book. Cross-check the service records against the MOT mileages; the dates and miles should line up. Gaps aren’t fatal but they’re negotiating leverage.
• MOT certificates and the cambelt — if the car’s old enough to be due a cambelt change, demand the receipt. “It’s probably been done” is worth a several-hundred-pound discount until proven otherwise.
• Two keys — a single key often means a cheaper-than-expected replacement is looming, and is sometimes a clue the car was repossessed or a write-off.

The in-person inspection

View in daylight, in the dry — wet bodywork and dusk hide a multitude of sins. Sellers who only offer evening or rainy viewings are sometimes counting on exactly that.

Bodywork and panels: sight down each side for ripples and mismatched paint. Uneven panel gaps and paint overspray on rubber seals point to accident repair. A fridge magnet that won’t stick reveals filler.

Tyres: all four should be a reputable brand, evenly worn, and legal (1.6mm). Uneven wear across a tyre suggests tracking or suspension issues; four odd budget tyres suggest a corner-cutting owner.

Under the bonnet: oil on the dipstick should be clean-ish, not milky (milky can mean head-gasket trouble). Look for leaks, corrosion and a fresh-looking engine bay that’s been steam-cleaned to hide them.

Interior vs mileage: a worn steering wheel, shiny seat bolsters and tired pedals on a “low-mileage” car don’t add up — another clocking tell.

The test drive: cold start (ask them not to warm it up before you arrive), listen for knocks and whines, check the brakes pull up straight, every gear engages cleanly, and no warning lights stay on. Get it to motorway speed if you can.

After you buy — protect what you just paid for

Get the V5C transfer done with the DVLA, sort insurance before you drive away, and keep every document the seller handed you. That history folder you just scrutinised is now your asset — and the day you come to sell, a buyer will scrutinise it exactly the way you did.

That’s where The Garage comes in. Pull the car’s MOT history in automatically, scan the seller’s receipts and your own future ones into one tidy record, get reminded before the MOT and each service fall due, and export a clean, branded history pack when it’s your turn to sell. The checks that protected you as a buyer become the proof that pays you back as a seller.

Run the free checks first, every time. Most of a used car’s problems will tell on themselves before you’ve spent a penny.