What should I check before buying a used car?

Before buying a used car, check the MOT history for mileage drops and repeat faults, confirm the recorded history is clean (no outstanding finance, write-off or stolen marker), make sure the advert and seller add up, and check the asking price against the market. Then, on a car you are serious about, inspect it in person and take a test drive. The paperwork and history checks should come first, so you only spend time viewing cars worth viewing.

What is the most important check when buying a used car?

Outstanding finance is the single most important check on a private sale. If a car is still on a finance agreement, the finance company legally owns it and can repossess it from you even after you have paid the seller in full. Always confirm the car is clear of finance before you hand over any money.

How do I check a used car before buying it?

Run a used car check on the registration or the listing before you view. CarMate reads the advert, pulls the full MOT and mileage history, checks the recorded history for finance, write-off and stolen markers via Experian, and compares the price to the market, then gives one clear verdict. That covers the desk checks in one report, so the only thing left is to view and test drive the car in person.

Should I buy a used car with no service history?

It is not an automatic no, but it is a strong reason to be cautious and to negotiate. Missing service history makes it harder to know whether key jobs like cambelts, oil changes and clutches have been done, which raises the risk of a big bill. Use the MOT history to fill in some of the gaps, and price the uncertainty into your offer.

What to Check Before Buying a Used Car: The Complete Checklist

Buying a used car privately can save you thousands, but it is also where the risk sits: no dealer warranty, no comeback, and a seller who may not tell you everything. The good news is that almost every nasty surprise is avoidable if you check the right things in the right order.

Here is the complete checklist. Do the desk checks first, they are quick and cheap, and they stop you wasting time viewing cars that were never worth it. Only then do you go and see the car.

Before you view: the desk checks

These are the checks you do from your sofa, on the listing and the registration, before you agree to see anything.

1. The recorded history

This is the one that can cost you the whole car. Check for:

Outstanding finance - the most important check on a private sale. If the car is still on finance, it can be repossessed from you even after you have paid.
Insurance write-off - whether it has been written off and the category (Cat A, B, S or N).
Stolen and scrapped markers - whether it is recorded as stolen or scrapped.
Import, export and plate changes - and the number of former keepers.

You cannot see any of this from the car or the V5C. It comes from a vehicle history check.

Never skip the finance check On a private sale, outstanding finance is the risk that can leave you with no car and no money. Confirm the car is clear of finance before you pay a penny, and get written proof if there is a balance to settle.

2. The MOT and mileage history

The MOT history is free and tells you a huge amount. Look for:

A believable, steady mileage climb. A drop, or a suspicious flat patch, can point to clocking.
The same advisory coming up year after year, a sign of a fault that has been ignored.
Recurring failures on brakes, suspension or corrosion, which hint at a car run on the cheap.

3. The advert and the seller

Does the description match the photos and the official spec (engine, fuel, colour, year)?
Are the photos genuine, or lifted from another listing? A reverse image search can catch this.
Is the seller pushing for a deposit, a quick sale, or payment before you have seen the car? Those are classic fraud signals.

4. The price

Check the asking price against similar cars on the market. A price that looks too good is usually too good, either the car has a problem, or it is a scam. Knowing the fair value also gives you a real basis to negotiate.

On the day: viewing the car

Once a car has passed the desk checks, go and see it, ideally in daylight and dry weather.

Paperwork: check the V5C logbook is present and the seller's name and address match. Confirm the VIN on the car matches the V5C.
Bodywork: look down the panels for uneven gaps or mismatched paint that hint at accident repairs.
Tyres and brakes: uneven tyre wear can mean alignment or suspension issues.
Under the bonnet: check the oil, look for leaks, and start the car from cold if you can.
Test drive: listen for knocks, feel the clutch and gearbox, check the brakes pull up straight, and make sure no warning lights stay on.

The order that saves you money Desk checks first, viewing second, mechanic's inspection last. Run the history, MOT, advert and price checks before you drive anywhere, so the only cars you view are ones already worth your time. Save the paid physical inspection for the single car you are ready to buy.

Do all the desk checks in one go

You can do these checks separately, but it is quicker to do them together. A CarMate used car check reads the advert, pulls the full MOT and mileage history, checks the recorded history through Experian, and compares the price to the market, then gives you one plain verdict: worth viewing, worth negotiating, or walk away. You run it from a screenshot, a listing link or the registration, before you message the seller.

For the checks that matter most on their own, see our guides on checking for outstanding finance and what the write-off categories mean.