How to Check a Used Car Before Buying: Complete UK Checklist (2026)
A thorough inspection before you buy is the single best protection against an expensive mistake. This 40-point checklist covers everything — from the digital checks you should do before you even view the car, to the paperwork you need to verify before signing. Take this with you to every viewing.
Section 1: Before you visit (digital checks)
1. HPI / provenance check — £20-£100
A full HPI check (or equivalent from Experian AutoCheck, the AA, or RAC) reveals: outstanding finance registered against the car, write-off status (Category A, B, S, or N), stolen vehicle register, mileage discrepancy flags, number of previous keepers versus V5C claims, and import/export history. Run this before visiting — if the car is category-N with outstanding finance, you have saved yourself a trip.
Free alternative for basic data: the DVLA's free vehicle enquiry service at gov.uk/get-vehicle-information-from-dvla gives you tax status, MOT expiry, engine size, and registration date. Not a full provenance check but a useful first filter.
2. Free MOT history check (gov.uk)
The DVLA provides a free MOT history check at gov.uk/check-mot-history — enter the registration plate and see every MOT result including passes, failures, and advisories going back years. Look for: patterns of recurring advisories (e.g. advisory for brake discs two years running suggests maintenance minimalism), sudden mileage drops between tests (a red flag for clocking), a recent long gap between MOTs (the car may have been off-road), and the total mileage trajectory over time — if the car claims 38,000 miles but had 35,000 on its last MOT 3 years ago, that implies under 1,000 miles per year which demands explanation.
3. Market price check (AutoAlpha)
Before viewing, run a search on AutoAlpha for the exact model, year, spec, and approximate mileage. Know the market median — if the car is priced 15% above median, you know to negotiate hard or to have a very good reason for the premium (very low mileage, dealer warranty, recent service). Walking in without this number means you are negotiating blind.
Know the market price before you visit — not after
AutoAlpha gives you the live market median for any car in under 60 seconds so you walk into every viewing fully prepared.
Section 2: Exterior check (20 points)
View the car in daylight, preferably on a dry day. Wet or gloomy conditions can hide panel damage that is clearly visible in good light. Start from a distance and work methodically around the car.
| # | Check Point | What to Look For | Red Flag |
|---|---|---|---|
| 1 | Panel gaps (all around) | Even, consistent gaps between every panel | Uneven gaps = accident repair or poor reassembly |
| 2 | Paint colour match | Same shade and sheen on all panels in the same light | Slightly different shade on one panel = respray after repair |
| 3 | Paint depth / texture | Run your hand across panel edges — should be smooth | Orange-peel texture, visible brush marks = cheap respray |
| 4 | Bonnet alignment | Level and centred when closed | Sits high on one side = accident damage, replaced bonnet |
| 5 | Boot alignment | Closes flush and level | Drops to one side = rear-end impact damage |
| 6 | Door alignment | All four doors open and close smoothly, line up with the body | Stiff opening, gap variation = chassis damage |
| 7 | Windscreen | No chips in driver's direct vision area, no long cracks | Any crack longer than 10cm will fail MOT |
| 8 | All lights working | Headlights (dip and main), fog, reverse, brake, indicators | Any non-functioning light = negotiating point + cost |
| 9 | Headlight condition | Clear lenses, no moisture inside | Yellowed lenses = aesthetic; moisture = seal failure £200+ |
| 10 | Tyre tread depth | Check all four — legal minimum 1.6mm, safe minimum 3mm | Under 3mm = budget for replacement. Uneven wear = alignment issue |
| 11 | Tyre sidewall condition | No bulges, no cracking, no scrapes from kerbing | Any bulge = immediate replacement, do not drive on it |
| 12 | Alloy wheel condition | Minor kerbing scuffs are common; check for cracks | Cracked alloy = safety issue and expensive replacement |
| 13 | Sill rust | Check undersides of both sills along the full length | Significant surface rust or pitting = structural concern |
| 14 | Wheel arch rust | Inner wheel arch edges and the arch lips | Rust through on arch lips = MOT fail, expensive repair |
| 15 | Underbody (if accessible) | Look under the rear and front with a torch | Welding patches, crush zones bent = serious crash damage |
| 16 | Exhaust condition | Colour of tip, check for holes, secure mounting | Heavy black soot = oil burning; loose mounting = noise + fail |
| 17 | Bumper alignment | Lines up with bodywork, no cracks | Mis-aligned or repaired bumper = impact history |
| 18 | Tow bar (if fitted) | Check mounting points for corrosion, wiring harness condition | Poorly fitted tow bar can damage chassis points |
| 19 | Sunroof (if fitted) | Opens and closes, check seals for cracking | Cracked or perished seals = water ingress risk |
| 20 | Spare wheel / tyre repair kit | Present and in usable condition | Missing spare = cost to replace; missing kit = MOT advisory |
Section 3: Interior check (10 points)
| # | Check Point | What to Look For / Red Flag |
|---|---|---|
| 21 | Seat wear vs mileage claim | High wear on driver's seat bolster or wheel suggests more use than claimed mileage |
| 22 | All electrics functioning | Test every button: windows, mirrors, heated seats, AC, infotainment, parking sensors, camera |
| 23 | Dashboard warning lights | Start the engine and verify all warning lights extinguish within a few seconds. Any that stay on = fault codes |
| 24 | Air conditioning | Does it cool? Does it have any musty smell (blocked drain, mould)? Regas costs £60-£100 if needed |
| 25 | Upholstery and headlining | Stains or burns on fabric; headlining sag; any damp smell (water ingress) |
| 26 | Boot condition and spare | Carpet dry (no water ingress), spare wheel or kit present |
| 27 | Service book stamps | Stamped at correct intervals by named garage or dealer? Unstamped books or very sparse records are a concern |
| 28 | V5C document checks | Seller's name and address match V5C. Registration number matches. Number of previous keepers matches HPI result |
| 29 | VIN match | VIN on dashboard (visible through windscreen), on door jamb sticker, and on V5C must all match exactly |
| 30 | Odometer vs service book | Mileage in service book entries should progress logically toward current odometer reading |
Section 4: Engine check (8 points)
| # | Check Point | What to Look For / Red Flag |
|---|---|---|
| 31 | Oil level and condition | Should be between min and max on dipstick. Black/gritty oil = overdue service. Milky brown oil = coolant contamination = head gasket issue |
| 32 | Coolant colour and level | Should be correct colour (usually blue/green or pink/red depending on brand) and between min/max. Brown murky coolant = degraded, needs flush |
| 33 | Oil filler cap underside | Creamy deposit on underside of filler cap = coolant in oil = potential head gasket fault (costly) |
| 34 | Cam/auxiliary belt condition | If visible, check for cracking. Ask for belt replacement history — most cars require belt change at 60,000-100,000 miles or 5-7 years |
| 35 | Cold start behaviour | Ask to view from cold start. Any metallic rattling in first 10-30 seconds = timing chain / tensioner issue. Should idle smoothly within seconds |
| 36 | Smoke from exhaust | Blue smoke on start or acceleration = oil burning. White smoke (persistent, not just condensation) = coolant burning. Black = rich mixture / injector issue |
| 37 | Engine bay tidiness | Some dirt is normal. But fresh-looking paint over rust, or suspiciously clean areas next to dirty areas, can indicate recent repair work or flood damage |
| 38 | OBD fault code scan | Use a £15-20 Bluetooth OBD reader and appropriate app to scan for stored fault codes. Cleared codes can still leave pending faults that are immediately visible |
Section 5: Test drive (key checks)
Always test drive — every car, every time. Ask to drive from cold if possible (reveals starting behaviour and warm-up issues). Drive for at least 15-20 minutes including some higher-speed running if possible.
Cold start: Listen for any metallic rattles, knocking, or diesel clattering in the first 30 seconds. These should clear within a few seconds. Persistent noise after warm-up is a concern.
Brakes: Brake firmly from 30mph on a safe straight road. The car should stop straight without pulling. Vibration through the pedal suggests warped discs. Sponginess suggests air in the hydraulic system or worn pads.
Steering pull: On a clear straight road, briefly release the wheel at low speed. Any significant pull to one side suggests alignment issues, tyre problems, or suspension wear.
Gearbox smoothness (auto): All gear changes should be imperceptible in normal driving. Hesitation, clunking between D and R, or refusal to downshift promptly under acceleration are concerns.
Clutch (manual): Clutch should bite at a consistent point, not too high or too low. A very high biting point suggests a worn clutch approaching replacement (budget £400-£700 for a full clutch kit).
AC under load: Turn on AC and drive for 10 minutes — check it maintains temperature. Some cars' AC systems fail gradually; what works for 2 minutes may not maintain cooling over a longer drive.
Section 6: Paperwork checklist
| Document | What to Check | Red Flag |
|---|---|---|
| V5C (logbook) | Present, in seller's name, VIN matches car, registration matches | Missing V5C, inconsistencies, or seller is not on V5C |
| MOT certificate | Most recent certificate, matches the car's registration | Mileage on MOT significantly lower than current odometer |
| Service history | Stamped book or digital dealer stamps, intervals make sense | Very sparse, missing years, or no stamps at all |
| Finance settlement | If HPI shows finance, get written proof it is settled or will be settled before funds change hands | Unresolved finance — do not proceed without clearance letter |
| Recall completion | For affected models, DVSA recall checker (gov.uk/check-vehicle-recalls) confirms completion | Outstanding safety recall not completed |
| Warranty documents | If remaining manufacturer warranty, confirm it transfers (check brand policy) | Warranty already voided by aftermarket modification |
Complete your checks — then confirm the price is fair
Once you've inspected the car, use AutoAlpha to verify the asking price sits at or below the market median before you agree to anything.
You've done the inspection — now make sure the price is right too
AutoAlpha gives you the live market median for any used car in under 60 seconds — the final check before you commit to any purchase and hand over your money.
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