What to look for when buying a used car comes down to four things: the paperwork, the vehicle history, the physical condition and how it drives. A sound used car has a matching V5C logbook, a clean vehicle history check, an MOT record that tells a consistent story and no unexplained gaps in its service history. Skipping any of the four is how buyers end up with a car they cannot sell or legally drive.
Part of Used Car History. Start with the main guide: Car Finance Checker: Is There Finance on a Car?
Updated October 2026 · Independent information, not legal advice
Start with the registration number, because the records attached to it frame every other question. The free number plate check shows the MOT history, tax status and mileage readings, and those facts tell you what to ask the seller before you travel to see the car.
What To Check When Buying A Used Car Before You View It
Good advice on buying a used car starts with research from your desk. Knowing what to check when buying a car saves a wasted journey. Enter the registration into the free lookup and compare what it shows with the advert, then ask the seller for the V5C details, service records and the reason for selling.
Match the advert to the records
- Make, model, colour and fuel type
- Year of manufacture and first registration
- Engine size
- MOT expiry and tax status
- Mileage readings against the advertised figure
- Whether the seller's details match the V5C
Things To Check When Buying A Second Hand Car Online
Photos, listings and messages can hide problems. Be wary of adverts with stock photos, a registration blurred in every image or a price far below similar cars.
Red flags in a listing
Pressure to pay a deposit before viewing, sellers who refuse to meet at their home address, no V5C available and vague answers about history are all reasons to stop. Never pay for a car you have not seen and inspected.
Check The V5C Logbook
The V5C is the registration certificate that records the registered keeper, not the legal owner. The name and address should match the seller, and the details should match the car. Our notes on the vehicle registration document explain each section.
What a genuine V5C looks like
Check the vehicle details, the date of first registration, the number of previous keepers shown and the document reference. Vehicle provenance means the documented story of the car: who registered it, how it was tested and what is recorded against it. A seller without a V5C, or one who says it is "in the post", should make you pause, because the new keeper slip cannot be completed without the right paperwork.
Match The VIN And The Registration
The vehicle identification number should be the same on the V5C, the chassis stamp and the windscreen or door plate. A mismatch can point to a cloned or rebuilt car. Read how a vehicle identification number is laid out.
Where to find the VIN on the car
A modern car has a 17-character VIN stamped on the chassis and shown on the V5C and a plate or sticker. Check it is not scratched or covered, and that the characters are in the same style.
Run A Vehicle History Check
A vehicle history check from a commercial provider gathers data on outstanding finance, write-off category, stolen vehicle markers, mileage and scrapped status. A free reg check does not show those items, which is why many buyers use both. See free versus paid vehicle checks for a neutral comparison.
What a paid check can reveal
- Outstanding finance held against the car
- Insurance write-off category (A, B, S or N)
- Stolen vehicle markers
- Scrapped or exported status
- Plate changes and key events
- Mileage and previous keeper events
Is There Outstanding Finance?
A car sold with outstanding finance can still belong to the finance firm, and it could be recovered from you even after you pay the seller. Finance data is held by finance providers and shown on commercial checks, so read how to find out if there is finance on a car.
| Check | What it shows | What it misses |
|---|---|---|
| Free reg lookup | MOT history, tax status, mileage readings, basic details | Finance, write-off, stolen status |
| Full history check | Finance, write-off category, stolen markers | Mechanical condition |
| V5C inspection | Registered keeper and vehicle details | Legal ownership or finance |
| Independent inspection | Condition, repairs, corrosion | Past finance or police records |
Never rely on the seller's word
A seller may genuinely not know, or may not say. Get a check done on the registration yourself rather than accepting a statement or a screenshot.
Has The Car Been Written Off?
Insurers record write-offs on the MIAFTR database, and categories since October 2017 are A (scrap only), B (break only), S (structural damage, repaired) and N (non-structural damage, repaired). Cars in categories S and N can be repaired and returned to the road. A scrapped vehicle recorded as such should not return to the road under that registration, so a seller offering one needs hard questions.
Why it matters
A repaired write-off can be worth less, harder to insure or harder to sell, and the quality of repair varies. Read how to check if a car has been written off before you agree a price.
Is The Car Stolen?
A stolen vehicle should not be sold on, and buying one can mean losing the car and the money. Police data held on the Police National Computer reaches buyers through commercial checks. See how to check if a vehicle is stolen.
Signs the paperwork is wrong
A seller who will not show ID, a V5C that looks altered, keys missing and a price that seems too good are all signs to walk away and report concerns to the police if you suspect a crime.
Is The Car Insured And Taxed?
Insurance status is held on the Motor Insurance Database, which anyone can query through askMID, but a free number plate check does not show insurance. Vehicle tax is not transferable, so you must tax the car yourself before driving it. Use is my car insured for the process.
Tax and MOT before you drive away
Check the tax status with the free tool and confirm the MOT is valid, as a car needing an MOT will not normally be taxed without one. Never drive an untaxed or uninsured car home.
Read The MOT History Properly
The MOT history lists every test, with pass or fail results, advisories, defects and recorded odometer readings. It is among the most useful free records when buying.
What to look for in the results
- Repeated failures for the same item
- Advisories that never get fixed
- Long gaps between tests
- Corrosion notes on structure, brakes or suspension
- Recent first-time fails before a quick sale
- Passes with long lists of advisories
Check The Mileage
A recorded mileage that climbs steadily is reassuring. A reading that goes down, or a leap that does not fit the car's use, is a warning. Use a mileage check to review the MOT odometer readings.
Cross-check against wear
Pedal rubbers, seat bolsters, steering wheel wear and the gear knob should fit the mileage. A low reading on a car with a badly worn interior is a question for the seller.
Service History
A full service history, with receipts and stamps from named garages, shows the car has been looked after. Check dates and mileage against the MOT history, and ask about major jobs like timing belts and clutches. The car service history check explains what is and is not available.
Service history is not on the free lookup
It is kept by owners and garages, not by the DVLA or DVSA. If the seller has no paperwork, treat the car as unserviced and price accordingly.
Number Of Previous Keepers
The number of previous keepers affects how a car has been used, but a high number is not automatically bad. A one-owner car with a gap in history can be as questionable as a car with several owners and a complete record. See how many owners a car has had.
What the V5C can show
The V5C shows the number of former keepers on older formats, and the date of the last issue helps you spot recent changes. The free lookup does not show previous keepers.
Walk-Around Body Checks
Inspect the car in daylight and dry weather. Walk round it slowly, crouch to see along the panels and look for ripples, mismatched paint, uneven gaps and overspray on seals.
Signs of poor repair
- Panel gaps that vary widely
- Paint texture or shade differences
- Rust bubbling under paint
- Fresh underseal in odd places
- Mismatched or new bolts around panels
- Door or bonnet misalignment
- Overspray on rubber seals or trim
Tyres, Wheels And Brakes
Tyres tell a story about alignment and care. Look for even wear across each tyre, matching brands front and rear, adequate tread and no bulges. Wheels should be free from kerb damage.
Brake discs and pads
Deep lips or heavy rust on the discs, a pulsing pedal and a pull to one side under braking are signs of wear or neglected maintenance.
Interior, Electrics And Warning Lights
Test every switch, window, mirror, light, heater, air conditioning setting and the infotainment. Dashboard lamps should light at ignition and go out. Our notes on the check engine light explain the lamp that worries buyers most.
Smells and damp
A musty smell, damp carpets or fogged lights may point to a leak or flood damage. Lift the mats and check the boot floor for water or silt.
Under The Bonnet And Cold Start
Ask for the engine to be cold when you arrive. Check oil level and colour, coolant, leaks and belts, and listen at start-up for rattles or rough running.
Basic fluid checks
Use the dipstick, look for milky deposits under the oil cap and see whether the coolant is clean. Read how to check the oil in a car.
The Test Drive
Drive on a mix of roads. Check the car pulls straight, brakes without vibration, changes gear smoothly and does not make unusual noises. Check your insurance covers the drive.
A test drive checklist
- Start from cold and listen.
- Drive slowly and then at speed.
- Brake firmly in a safe place.
- Check steering returns and does not wander.
- Use every gear and the clutch.
- Watch for warning lights.
Independent Inspection
If you are unsure, a professional inspection by a motoring organisation or independent garage can put the car on a ramp and look underneath. Fees are set by the provider.
When it is worth it
Consider one for a higher-value car, a car far from home, a specialist model or an electric vehicle where battery health matters. A seller who refuses an inspection is a red flag.
Used Electric And Hybrid Cars
For an electric or hybrid car, ask about battery health and warranty, charging cable and adapter, software updates and the charging history. A battery health report is useful evidence.
Differences in the paperwork
The same V5C, MOT and history checks apply, but there is no exhaust emissions test on a fully electric car. Check any manufacturer battery warranty transfer rules directly.
Imported Vehicles
An imported vehicle should have been registered with the DVLA, with the V5C showing the registration date and the import details. UK records may start later than the car's real age.
Questions to ask
Ask for the foreign registration papers, proof of tax paid and any conversion work. For an Irish car read about an Irish reg check.
Motorbikes, Vans And Classics
Motorbikes need the same record checks, and our motorbike HPI check notes cover the specifics. Vans need a close look for hard use, and classics may be exempt from the MOT depending on age.
Classic and historic rules
Exempt does not mean safe. Look for a specialist report and check the rules on GOV.UK. Read tax for classic cars for the tax side.
Buying From A Dealer Versus Privately
A dealer sale usually comes with consumer rights set out in law, whereas a private sale is "sold as seen" in many respects and the car must still be as described. Check current rights on GOV.UK or with Citizens Advice.
Paying safely
Use a traceable payment method, avoid cash for large sums and get a receipt that lists the registration, VIN, price, date and both parties' details.
Completing The Sale And The V5C
At the sale, the seller and buyer complete the V5C, with the new keeper slip handed to you, and the DVLA is told of the change. See how to transfer a vehicle to a new keeper.
After you buy
Tax the car in your name before driving it, arrange insurance and keep your documents. The DVLA sends a new V5C to the new keeper address.
Common Mistakes When Buying A Used Car
Most problems come from rushing. Buyers skip the history check, view in poor light, trust screenshots or ignore a gap in the MOT history.
Myths that cost buyers
- Myth: a recent MOT means a good car
- Myth: a clean V5C proves no finance
- Myth: low mileage means no problems
- Myth: one owner means careful use
- Myth: a seller's screenshot proves a clean history
Frequently Asked Questions
What should I look for when buying a used car?
Look at the paperwork, history, condition and drive. Check the V5C matches the seller and the vehicle, run a vehicle history check, read the MOT history and mileage readings, inspect the body, tyres and engine in daylight and take a proper test drive. If anything does not add up, walk away rather than hoping it will work out.
What is the first thing to check when buying a used car?
Check the registration and V5C first. Enter the reg into a free lookup to compare make, model, colour, fuel and MOT history with the advert, then ask to see the V5C and check the seller's details. Problems with paperwork are the quickest reason to walk away before spending time on the car.
What are the things to check when buying a used car privately?
Check ID and the V5C with the seller, view at their home address in daylight, run a history check for finance, write-off and stolen markers, read the MOT history, inspect the car and test drive with your own insurance cover in place. Pay by a traceable method and get a written receipt.
Does the free reg check tell me everything?
No. A free reg check shows MOT history, tax status, mileage readings and basic vehicle details, but not outstanding finance, write-off or stolen data, service history, previous keepers or owner details. A commercial vehicle history check adds finance, write-off and police data, which is why many buyers use both.
How do I check if a used car has outstanding finance?
Outstanding finance is not on the free lookup. Finance firms hold the data, and commercial vehicle history checks report it. If a car is sold with finance still owing, the finance company may be able to reclaim it. Always check before paying, and keep proof of the check with your purchase paperwork.
What do write-off categories A, B, S and N mean?
Category A should be scrapped entirely, category B should be broken for parts, category S has had structural damage and was repaired, and category N has had non-structural damage and was repaired. The categories apply since October 2017 and are recorded by insurers on the MIAFTR database, and a full history check shows them.
How can I tell if the mileage is genuine?
Compare the odometer reading with the MOT history, which records readings at each test. Readings should rise steadily. A drop or a large jump needs explaining. Also match wear on pedals, seats and steering wheel to the mileage, and ask for service invoices that show mileage at each visit.
Is it worth getting a car inspected before buying?
An independent inspection can find problems you cannot see without a ramp, such as corrosion underneath or hidden repairs. It is especially worth considering for expensive cars, distant purchases, specialist models and electric vehicles. A seller who refuses a reasonable inspection is giving you useful information.
Should I check the car's tax and insurance?
Yes. Check the tax status with the free tool and remember that tax does not transfer to you, so you must tax the car before driving it. Insurance is held on the Motor Insurance Database and can be checked on askMID, but you need your own cover to drive the car away.
What documents should the seller give me?
Expect the V5C with the new keeper slip, the current MOT certificate if there is one, service records, receipts for major work, spare keys, any manual and warranty papers. A seller who cannot supply the V5C is a concern, as you will need it to register the car in your name.
What should I do if I find a problem after buying?
Gather your documents and speak to the seller or dealer quickly. For a dealer sale, your consumer rights may apply, and Citizens Advice or GOV.UK can explain them. In a private sale the options are narrower, so photograph issues, keep messages and get advice before paying for repairs.
Where do I find official guidance on buying a used car?
GOV.UK has guidance on registering a vehicle, vehicle tax, MOTs and your rights as a buyer, and the DVLA and DVSA publish the underlying records. In Northern Ireland, testing is run by the DVA, so check the equivalent guidance there.
Official Sources
Rules, fees and deadlines change. Confirm anything that affects your money or legal position with the official service.