Questions to Ask When Buying a Used Car: UK Checklist

How to work through this checklist

Part of our guide to buying a used car. There's a right order to ask these questions. Before you travel to see the car, a few checks from home rule out an obvious waste of time. At the viewing, the documents and the car itself need to tell the same story. During the drive, a handful of specific things separate a sound car from a problem waiting to happen. And before you agree a price, the car's provenance — has it been written off, financed, stolen, clocked — matters more than almost anything else, because no amount of asking the seller settles it on its own; that's what a car check is for.

Work through the sections in that order and you'll catch nearly everything that trips buyers up.

Before you travel to see it

Get the full registration, make, model and MOT test number from the seller before you arrange to view. Gov.uk's own guidance is direct on this: check the details you've been given against DVLA's records, confirm the MOT status and history line up with what you've been told, and check the vehicle hasn't been recalled for a safety defect.

• Cross-check the registration. Run it through our free car check — it confirms make, model and current MOT and tax status from just the plate, so a mismatch shows up before you've left the house.
• Check for open safety recalls. gov.uk's recall checker is free to use and covers recalls reported by participating UK vehicle manufacturers — the large majority of cars on the road — if there's an outstanding one, the fix is free regardless of the car's age or mileage, but you shouldn't drive it until it's done.
• Ask why they're selling, and how long they've owned it. A short ownership window paired with a vague reason for selling is worth probing, not necessarily a red flag on its own.

Documents to check at the viewing

This is where gov.uk's own checklist is most specific, and worth following closely.

• Check the V5C for a "DVL" watermark, held up to the light. A logbook without it is a strong warning sign.
• Check the V5C's serial number isn't in a known stolen-blank range. Gov.uk names two specific ranges to watch for: BG8229501 to BG9999030, and BI2305501 to BI2800000. A V5C in either range may have been stolen blank — report it to the police rather than proceed.
• Match the seller's name and address on the V5C to who you're actually meeting.
• Check the VIN and engine number against both the V5C and the physical car — they should match exactly.
• Ask for the service history — book stamps or digital records — and compare it against the MOT mileage history for consistency (more on that below).
• Count the keys. Two is standard; one on its own isn't a dealbreaker but is worth a question, and a replacement key can be a genuine expense.

Gov.uk's checklist stops there — it doesn't cover mileage consistency, outstanding finance, stolen or write-off status, or the test drive. That's deliberate: those are exactly the areas the rest of this guide, and a car history check, exist to cover.

Questions about the car's history

These are the questions a seller's word alone can't settle — you need a check that pulls from DVLA, insurance and finance industry records.

• Is there outstanding finance on it? If the previous owner hasn't finished paying off a hire-purchase or PCP agreement, the finance company can, in some circumstances, still have a claim on the car — even after you've bought it. See our guide to outstanding finance for how the "innocent purchaser" protection actually works.
• Has it ever been written off, and what category? A Cat S or Cat N marker means the car was declared an insurance write-off and repaired — not necessarily a dealbreaker, but you should know before you buy, not after. See insurance write-off categories explained, or the deep dives on Cat S and Cat N.
• Has it ever been reported stolen? See our guide to stolen car checks for what a "stolen marker" actually means and how it's checked.
• Does the mileage add up across its MOT history? The MOT record shows the mileage logged at every test — a drop, or an implausible jump, is the clearest free tell of tampering. See how to spot mileage clocking for the full walkthrough.

Our free car check covers the MOT history and tax status. For finance, write-off and stolen status, you need our Comprehensive check — the free check simply doesn't have access to that data.

Condition and mechanical checks

• Bodywork and paint consistency. Panel gaps, colour mismatches between panels, or overspray on trim can point to accident repair.
• Tyre tread. The UK legal minimum is 1.6mm, measured across the central three-quarters of the tread around the whole tyre — driving below that risks a fine and points per illegal tyre. Most tyre safety experts recommend replacing well before that, at around 3mm, since braking performance in the wet drops off well before the legal limit is reached. Don't take "3mm" as the law — it isn't; it's the safety-recommended point to replace, and the two get mixed up on some ranking guides.
• Fluid levels and dashboard warning lights. A lit warning light the seller "knows about" is a negotiating point, not something to wave off.
• Cambelt (timing belt) service. Ask if it's been done and when — intervals vary a lot by make and model (broadly, somewhere in a 60,000–100,000-mile or 5–10-year range), so check the specific schedule for that car rather than assuming a figure.
• Electrics and features. Windows, aircon, infotainment, central locking — test everything that's meant to work, in front of the seller.

The test drive

In the few minutes you get: does it start cleanly from cold, does it pull to one side under braking, do all the gears engage smoothly, and are there any noises that don't belong — knocks over bumps, whines from the gearbox, grinding from the brakes. Our full during-the-drive checklist covers this in more depth, including what's normal wear versus what's a walk-away sign, in a dedicated guide to test driving a used car.

Negotiating — questions that double as leverage

Everything you've found so far — an MOT advisory, a mileage that's higher than average, a gap in the service history — isn't just information, it's leverage. Ask directly: "given the advisory/the mileage/the missing history, is there flexibility on the price?" A seller who's already had to answer your provenance questions honestly is in a weaker position to hold firm on price than one who's never been asked. A dedicated guide to used-car price negotiation goes through this in full.

Buying from a dealer vs a private seller — different questions

Some of these questions only make sense for one channel. A dealer sale is covered by the Consumer Rights Act 2015 — the car has to be of satisfactory quality, fit for purpose and as described, with a right to reject, repair or refund if it isn't. A private sale has narrower protection: broadly, the seller has to have the right to sell it and describe it accurately, but there's no "satisfactory quality" guarantee in the way a trader sale has one.

That difference changes what's worth asking. From a dealer: what warranty comes with it, and what does it actually cover? From a private seller: how many previous owners does the V5C show, and can they show a continuous paper trail? A full comparison of buying from a dealer versus a private seller covers the practical differences in more depth.

FAQs