The Used Car Buyer's Checklist for UK Sales

Written by the MOT Check Now editorial team and checked against GOV.UK and DVSA guidance. Last updated 3 November 2026. Read our editorial policy and how we get our data.

Good used car checks happen in three stages: before you view the car, while you are standing next to it, and after you have paid. Most buyers only do the second stage, and most expensive mistakes come from skipping the first and third. This checklist gives you the whole sequence in order, explains which risks the free official data covers and which it does not, and tells you when to walk away. Use it as a working document on your phone.

Key facts at a glance

Stage 1: Before you view (free checks from your sofa)

Ask the seller for the registration number before you travel. A seller who will not share it is a warning in itself. Then run these checks.

1. Match the car to the listing. Our vehicle check returns make, colour, fuel type, engine capacity, year of manufacture and the month of first registration. If the advert says a diesel and the record says petrol, or the colour differs, ask why. A listing is allowed to be wrong, but you need to know which is right.
2. Read the MOT history. Look for fails, repeated advisories, long gaps and failures for corrosion. Our guide on how to read an MOT history walks through each field.
3. Check the mileage trail. The mileage check charts the odometer readings from each test and flags falls, big jumps and long stalls. It is an indicator, not proof of clocking.
4. Check tax and SORN status. Use the car tax check and the SORN check. Tax does not transfer to a new keeper, so you must tax the car yourself before driving it away, however much tax the seller says is left.
5. Check the MOT expiry. A car with months left is more valuable than one about to expire, and a car with no MOT carries the risk of what the test finds. Read about the legal position in driving without an MOT, including how you can legally drive to a pre-booked test.
6. Check emissions-zone costs if you drive in a charging area. The ULEZ checker and Clean Air Zone checker estimate the position from Euro status and fuel type. Always confirm with the official zone operator.
7. Ask questions by message. How many keepers, why selling, service history available, any accident damage, any warning lights, is there outstanding finance. Keep the replies; they matter if a dispute follows.

Worked example: checking an advert against the record

None of these gaps proves dishonesty, because adverts are often written in a hurry. Together, though, they tell you the seller is not a reliable source on this car, and the record should carry more weight than the advert. The seller claim checker does this comparison for you: enter the registration and the advert’s mileage, MOT date and other details, and it marks each as a match, something to check or a mismatch. If you are torn between two similar cars, the compare cars tool puts their records side by side.

Questions to put to the seller before you travel

• Are you the registered keeper, and how long have you owned the car?
• Why are you selling?
• Is there a full service history, and can I see the invoices?
• Has the car had any accident damage or major repairs?
• Is there any outstanding finance on the car?
• Are there any warning lights, noises or known faults?
• Can I see the V5C when I visit, and will the VIN on the car match it?
• How many keys are there?
• Will you allow an independent inspection?

Watch how the seller answers as well as what they say. Vague answers, delays, answers that change between messages and pressure to decide quickly are signs to slow down.

Stage 2: At the viewing

Documents first

• Ask to see the V5C log book. Check that the registration number, make, model and colour match the car. Check the seller’s name and address against the person in front of you, and ask for ID if you are not sure. If the seller is not the registered keeper, find out why and be cautious.
• Match the VIN. The vehicle identification number on the V5C should match the number on the car, usually visible at the base of the windscreen and on a plate in the door frame or engine bay. Check that the stamped number has not been scratched or altered.
• Check the number plates. Both plates should match the log book and look like they belong together, with the same supplier marks and a similar level of wear. Our number plate guide explains the format and what a plate tells you about age.
• Look at the service history. Receipts and stamps show how the car has been cared for. Match dates and mileages against the MOT history. Gaps in servicing are common on older cars and are a negotiating point.
• Check the MOT certificate and the keys. Ask how many keys come with the car. A missing spare can be costly to replace.

Walk-round inspection

• Daylight and dry weather. Rain and darkness hide dents, paint flaws and panel gaps. If you can only view in poor light, ask to return.
• Panels and paint. Uneven gaps, ripples, mismatched shades or paint on rubber seals can all point to previous repairs. A repair is not always a problem, but you should know about it.
• Tyres. Check tread on all four, even wear across each tyre and matching brands. Uneven wear can point to suspension or alignment issues. Also look at the spare or inflation kit. Our tyre guide covers tread depth and condition.
• Underneath and wheel arches. Look for corrosion at the sills and arches and for oil or fluid drips beneath the engine. Structural corrosion is one of the more costly findings; compare your view with the MOT failure notes, see MOT failure reasons.
• Glass and lights. Chips in the windscreen, cloudy headlights, and all lights working.
• Interior wear. Pedal rubbers, steering wheel, seat bolsters and gear knob should match the claimed mileage. A very worn interior with low mileage is a question to ask.
• Water ingress. Damp carpets, fogged lights or a musty smell can mean leaks.

A quick scoring sheet for the walk-round

Start-up and test drive

1. Ask for a cold start. Touch the bonnet before you arrive. If the engine is already warm, the seller may have hidden a starting problem. Listen for rattles, smoke or uneven idling, and check that warning lights come on when the ignition is switched on and go out after starting.
2. Check the controls. Windows, mirrors, air conditioning, heating, infotainment, parking sensors and central locking.
3. Drive it properly. Include slow and fast sections. Listen for knocks over bumps, check the car tracks straight, test the brakes firmly (when it is safe) and check that gears change smoothly and the clutch bites.
4. Check insurance for the test drive. Confirm that you are covered, or that the seller’s policy allows you to drive.

On the test drive, use the same route the seller suggests, then ask to try a different stretch with hills, a faster road and a few tight turns. Keep the radio off. Pay attention to how the car pulls away, how the steering feels at speed, whether the brakes judder, and whether any warning light comes on once the car is warm. If you are not confident judging a car, take someone who is.

Electric and hybrid cars

An MOT does not assess the health of a traction battery, and neither do our free tools. If you are buying an electric or hybrid car, ask the seller for evidence of the battery’s condition, the charging cables that come with the car, and any warranty that still applies. Check that the car charges at the type of charger you will use. Electric cars are not charged for ULEZ, but confirm the position with the official zone operator for your journeys.

What free official data cannot tell you

Free MOT and tax data are accurate for what they cover, but they leave real gaps. Be clear about these before you pay:

• Outstanding finance. If the car is on finance, the lender may still own it, and it can be repossessed from you. This is not in MOT or DVLA vehicle data.
• Stolen status. Not covered by our free checks or the paid report.
• Write-off history. The car may have been written off in the past. Our checks do not show this.
• Accident repairs and engine or gearbox condition. The MOT does not cover these.
• Owner details. No keeper or owner information is available, so you rely on the V5C and the seller’s identity.

To cover finance, stolen and write-off risk, ask the seller for documents, use a licensed vehicle history provider that includes those checks, and use DVLA’s own services where they apply. A paid history check with those records is a sensible expense on any significant purchase. Our Full Vehicle Report at £3.99 is useful for the timeline and mileage side: it includes the MOT timeline, mileage chart and analysis, advisories that kept recurring, tax and MOT details and a plain-English risk summary. It does not include finance, stolen or write-off data, and we say so clearly.

Using the record to negotiate

The MOT history is not only a safety filter. It is also a source of negotiating points that are hard for a seller to dispute because they come from an official record.

Keep the tone factual. Point to the record, say what you expect it to cost and ask the seller to respond. If the seller will not move at all on a car with several known costs coming, that tells you something about the deal. Use the advisory tracker to see which advisories have been fixed, which are still open and which became failures, since an advisory that has been open for years is a stronger negotiating point than one noted for the first time.

When to walk away

Every buyer should have a list of deal breakers before they start. Common ones:

• The seller refuses to show the V5C or will not let you see the VIN.
• Name or address on the log book does not match the seller, and the explanation does not hold up.
• The registration, VIN or plates do not match the paperwork.
• Unexplained mileage falls in the MOT history.
• Structural corrosion or signs of poor accident repair.
• Seller pushes for cash only, a rushed sale or an unusual meeting place.
• Any suggestion the car is on finance with no proof it is settled.
• The car is described as having an MOT that the official record does not show.

The good news is that walking away costs nothing. Another car will come along.

Spotting a dodgy advert

Some problems show up before you have seen the car. These are warning signs, not proof, but together they justify extra care:

• A price well below similar cars with no clear reason.
• A seller who asks for a deposit before you have seen the car.
• Photographs that look like they were taken in a different place or season from where the seller says the car is.
• A seller who will not give the registration number, or whose details change between messages.
• A story that depends on urgency, such as moving abroad or a sudden bereavement, combined with pressure to pay quickly.
• An address for the viewing that is not where the car is registered, or a handover in a car park.

Run the registration through the free checks before you spend time or money. A mismatch between the advert and the record is one of the quickest ways to catch an advert that is not telling the truth. If the plates have been copied from another car, the record may describe a different make, model or colour from the one you are looking at, which is one more reason to compare the record with the car on the day.

Dealer or private seller: why it matters

Your rights depend on who sold you the car. A dealer, as a business, has legal duties about the quality and description of what it sells, and consumer protection rules cover those sales. A private seller has fewer duties, but must describe the car honestly and must have the right to sell it. In both cases, buying a car is not like buying a coat: you should assume that you can only rely on what you can verify. Read the official consumer guidance on GOV.UK for your situation, keep every advert, message and receipt, and note any promises about the MOT, service or repairs in writing. Verbal promises are hard to prove. This guide is general information and not legal advice.

Emissions zones and running costs

Where you drive affects what a car really costs. The Ultra Low Emission Zone in London charges £12.50 per day for non-compliant, non-exempt vehicles and runs 24 hours a day, every day except Christmas Day. As a broad guide, petrol cars need Euro 4 (broadly registered from 2005 or 2006) and diesel cars need Euro 6 (broadly from September 2015) to avoid the charge. Outside London, GOV.UK lists seven charging Clean Air Zones, and private cars are currently charged only in Birmingham and Bristol. Zones and charges change, so check the official council or operator page before you travel. Our ULEZ checker and Clean Air Zone checker estimate the position from Euro status and fuel type, and the congestion charge check covers the central London scheme. A car that is cheap to buy but charged every day you drive it is not cheap.

What to take with you and what to leave with

A little preparation makes the viewing quicker and keeps you in control of the conversation.

Take to the viewing

• A printed or saved copy of the checks you ran, so you can compare the record with the car.
• A torch for wheel arches and underneath, and a cloth for wiping dirty plates and glass.
• Your driving licence and proof of insurance for the test drive.
• A phone for photographs of the V5C details, the VIN, the odometer and any damage.
• A friend, ideally one who knows cars, and who can watch the car while you drive or talk to the seller.

Leave with

If you are not confident judging a car

There is no shame in paying a qualified inspector to look over a car you are serious about. An independent inspection records what a trained person sees on the day, gives you a list of faults to negotiate with, and tells you whether the car is worth the money. Agree the arrangements with the seller in advance, and treat a seller who refuses any independent inspection as a warning sign. An inspection also covers what the MOT does not, such as the engine, the gearbox and the quality of past repairs, but like the MOT it is a snapshot of one day.

Stage 3: Paying and the first day

1. Agree the price in writing. Get a receipt listing the registration, VIN, price, date, seller’s and buyer’s names and addresses and any condition promises.
2. Use traceable payment. A bank transfer leaves a record, which cash does not. Do not pay a deposit to someone you have not seen or to an account name that does not match the V5C.
3. Get insurance before you drive away. A vehicle needs insurance unless it has been declared off the road with a SORN. An uninsured, non-SORN vehicle can lead to a £100 fixed penalty for the registered keeper, a court fine of up to £1,000, and the car being clamped or removed.
4. Tax the car. Tax is not transferred with a sold vehicle. The new keeper must tax it before driving. The DVLA sets the standard rate each tax year, so check the current figure at the time.
5. Tell DVLA you are the new keeper. Complete the new keeper section of the V5C, or follow the online process, so the record changes. Keep your copy of the paperwork.
6. Diary the dates. Note the MOT expiry and tax due date, and set up a free MOT reminder.
7. Re-check the car. Within the first days, look for faults that were not obvious at the viewing and contact the seller promptly in writing if something is wrong. Your rights depend on whether you bought from a dealer or a private seller, so find out which applies before you buy.

If the car has no MOT, or the MOT will expire soon, book the test early. Remember that the only times you can legally drive without a valid MOT are to a pre-arranged test or to or from a place where repairs are being carried out. You can test up to one month minus one day before the expiry date and keep the same renewal date, as explained in how early you can get an MOT. Our MOT cost guide lists the maximum fees, and finding an MOT test centre helps you choose where to go. If the car fails, what to do after a failed MOT explains the next steps.

Common mistakes buyers make

• Checking the car and not the paperwork.
• Believing a clean MOT history proves the car is sound.
• Trusting the advert instead of the record.
• Viewing in the dark, in the rain, or at a stranger’s address.
• Paying before checking finance, stolen or write-off risk.
• Forgetting that tax does not transfer.
• Relying on a verbal promise about the MOT, service or repairs.
• Driving away with no insurance because the seller said the old policy would cover it.
• Skipping the new keeper step, which leaves the previous keeper’s details on the record.

The short version: a one-page checklist

1. Get the registration, run the vehicle, MOT history, tax and mileage checks.
2. Ask about finance, accident history, keepers and keys.
3. View in daylight. See the V5C, match the VIN and plates.
4. Inspect the body, tyres, underneath and interior.
5. Cold start, then a proper test drive.
6. Buy a licensed history check for finance, stolen and write-off risk.
7. Pay traceably, get a receipt and insurance, tax the car and update the V5C.

Glossary

Advisory

A note on a passed MOT that a part is not yet defective but is likely to become so.

Clocking

Altering an odometer to show a lower mileage than the car has covered.

Euro status

The emissions standard a vehicle was built to, used by emissions zones to decide whether a charge applies.

Keeper

The person registered with DVLA as responsible for the vehicle, shown on the V5C.

SORN

Statutory Off Road Notification: telling DVLA a vehicle is kept off the road.

V5C

The vehicle registration certificate, often called the log book.

VIN

The vehicle identification number, unique to each vehicle.

Write-off

A vehicle an insurer has judged uneconomical to repair after damage. Not shown in free MOT or DVLA data.

Sources and further reading

• GOV.UK: Buying a used vehicle and the guidance on checking a vehicle’s details
• GOV.UK: Getting an MOT and Check MOT history of a vehicle
• GOV.UK: Tax your vehicle and Make a SORN
• GOV.UK: Vehicle insurance and uninsured vehicles
• TfL: Ultra Low Emission Zone and GOV.UK: Clean Air Zones