Reading a Vehicle's MOT History, Row by Row

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.

Knowing how to check a car’s MOT history takes seconds. Knowing what the history is telling you takes a little practice. The record lists every test the car has had in England, Scotland and Wales since 2005, and each entry carries a result, a date, an expiry, an odometer reading and a list of defects. Read together, those fields show how the car has been looked after, how far it has really travelled, and whether a problem keeps coming back. This guide walks through a history from top to bottom, using an invented example, and lists the red flags worth acting on.

Key facts at a glance

How to get the history

You only need the registration number. Enter it in our MOT history tool or in the government service at GOV.UK. Both draw on DVSA test records. Northern Ireland is separate: its MOTs are run by DVA, so a Northern Ireland test does not appear in the Great Britain history. We are independent and not affiliated with DVLA or DVSA. If you want to know where our figures come from, the page on how we get our data explains the sources.

The step-by-step route is short:

1. Get the registration from the advert, the seller, or the plate on the car. If you are buying, ask for it before you travel.
2. Type it into the checker exactly as shown on the plate. Spaces and capital letters do not matter, but a letter O in place of a zero, or an I in place of a 1, will return the wrong vehicle or nothing at all.
3. Check the vehicle details at the top before you look at any test.
4. Read the tests from the oldest to the newest, so you see the story in the order it happened. Most tools show the newest first, so scroll to the bottom and work upward.
5. Note anything unusual, then use the red flag list below to decide what to ask the seller.

The vehicle details (make, model, colour, fuel type, engine size and registration dates) come from DVSA and DVLA records. The DVSA data also carries a first used date, a registration date, a manufacture date and the date of the last MOT test. Check these against the car in front of you before looking at any test. A different colour, engine size or fuel type from what the record states is worth asking about. Colour changes are common and often legitimate, but they should be explained, and a record that says petrol when the car is plainly a diesel needs a proper answer.

If you only want today’s status, the MOT check is quicker. This page is about the detail underneath.

The fields in each test, from top to bottom

Every test in the record carries the same set of fields. Once you know what each one means, a long history becomes quick to scan.

Test result

Every entry is a pass or a fail. A fail is followed by a retest in many cases, so you will often see a fail and then a pass a few days later. The sequence tells a story: a quick pass after a fail suggests the fault was fixed. A fail with no later pass, followed by a long gap, suggests the car was left, sold or scrapped.

The pairs of results you see most often are listed below. None of them is alarming by itself. What matters is how often they recur and what the defect lines say.

Test date

The date the test was completed. Look at the rhythm. A car tested once a year, on or just before its expiry, has a regular owner. Irregular dates, or tests that happen long after the previous expiry, are covered in the red flags below. When you read down the list, compare each test date with the expiry date of the test before it. If the new test happened inside the early window, the expiry carries on from the old date. If it happened after the old expiry, the car spent some time without a valid MOT.

Expiry date

The date the certificate runs out. Because you can test up to one month minus one day early and keep the same renewal date, expiry dates often stay on the same day of the year across several tests. For example, if a certificate expires on 15 May, a test from 16 April onwards keeps the same renewal date. Test earlier than that and the new expiry is counted from the new pass date. If the expiry date suddenly shifts, either the car was tested outside the early window or it was tested late. Our guide on how early you can get an MOT explains the rule. A failed test normally shows no new expiry, because no new certificate was issued.

Odometer reading

The mileage recorded at the test, with the unit (miles or kilometres) and whether the odometer was read or no odometer was available. The record stores the value, the unit and the type of result. This is the most useful single field when you are buying, because it gives an independent mileage trail. See our mileage check for the full approach to spotting discrepancies.

Two details trip people up. First, check the unit. Most cars show miles, but a car that has been imported, or one with a kilometre dial, may be recorded in kilometres. A reading of 80,000 kilometres is about 49,700 miles, because one mile is roughly 1.609 kilometres. If you plot kilometres and miles on the same line without converting, the history will look as if the mileage has fallen when it has not. Second, a few vehicles have no working or readable odometer at the test, and the record notes that no odometer was available. That is rare, but a repeated absence of readings removes the independent mileage trail and is worth asking about.

Defects

The list of problems the tester recorded, each with a category: dangerous, major, minor or advisory, plus a code for items repaired during the test (PRS). Dangerous and major defects cause a fail. Minor defects and advisories are on a passed test. Advisories are often the most useful part of a history, because they warn of parts wearing out. Our guide to MOT advisories explained covers them in detail, and MOT defect categories explains how testers decide between them.

How the five defect types look in the record

Because the defect lines carry so much of the useful information, it helps to know how to read each type quickly.

• Dangerous. A direct and immediate risk to road safety or the environment. The car fails and must not be driven. Seeing one on a past test is not a reason to reject a car, but you should confirm that the fault was repaired and that the next test passed.
• Major. A defect that may affect safety, put other road users at risk or harm the environment. The car fails. A single major defect followed by a pass is a normal ownership event, such as a worn brake disc or a blown bulb.
• Minor. Present but not serious enough to fail. These sit on a pass, and they are often cosmetic or marginal.
• Advisory. A component that is not yet defective but is likely to become so soon. These are the best early warnings in the record.
• PRS. A defect that was put right at the test centre during the test, so the car passed. It tells you the item was faulty on the day and was repaired at once.

The wording of each line is written by the tester, so two cars with the same fault may be described slightly differently. Look for the part (for example a tyre, a brake component or a suspension arm), the position (front or rear, nearside or offside) and the description of the problem, such as worn, corroded, leaking or insecure. Illustrative examples of the kind of wording you might see: “front tyre worn close to legal limit”, “slight oil leak, not excessive”, “rear brake pad wearing thin”. These lines are invented for illustration, and the exact text on a real record will differ.

A worked example

An invented five-door petrol hatchback, first registered in March 2014:

How to interpret the example

• First test in March 2017. Three years after registration, which matches the 3-year rule in our first MOT guide.
• 5 March 2018 test. The previous expiry was 11 March, so this was inside the early window and the new expiry kept the same day, 11 March 2019. A sensible, regular owner.
• The 2019 fail and retest. The fail on 26 March came after the 11 March expiry, so the car was past its MOT date for about two weeks, then failed on a brake disc. The pass two days later shows the fault was repaired quickly, and the new expiry runs from the pass date, 27 March 2020. One brake failure is normal wear. It is a note to check that the work was done properly, and the gap before the test is a note to ask what the car was used for in those two weeks.
• The oil leak advisory. It first appeared in 2019 and repeats every year since. A leak listed as “slight” for seven years is slowly getting worse or has never been fixed. Ask the seller about it and have a mechanic look underneath.
• The mileage in March 2023. The reading of 41,200 follows 56,480 the year before. A fall of more than 15,000 miles is impossible on a working odometer. It could be a typing error at the test, a replaced instrument cluster or deliberate tampering. After that the mileage climbs steadily again. The reading in 2026 is 60,710, so the real mileage is probably several thousand miles higher than the figure suggests. This is the sort of pattern our mileage discrepancy analysis flags. It is an indicator, not proof of clocking.
• Annual mileage. Between the 2017 and 2022 tests the car covered roughly 3,500 to 7,500 miles a year, with the lowest year between 2020 and 2021. Consistent use makes the 2023 fall stand out. After the fall, the yearly gains of about 6,400 to 6,700 miles fit the earlier pattern.

The example has one clear question for the seller (the mileage fall) and one for a mechanic (the oil leak). Neither is necessarily a deal breaker, but both are worth resolving before paying.

Working out annual mileage yourself

You do not need software to test whether a mileage trail is believable. Subtract each reading from the next and divide by the time between tests in years. In the example, the step from 49,120 to 56,480 is 7,360 miles in one year. The step from 56,480 to 41,200 is negative, and a negative number is the quickest red flag there is. Then compare the yearly figure with what you were told. A seller who says the car was used only for short local trips should have a history with modest, steady gains, and a seller who says it was a company car should expect larger ones. The aim is not to prove an exact figure. It is to see whether the pattern fits the story you have been given.

Three more things to watch for when you do the arithmetic. A sudden increase after years of low use can mean a change of owner or job. A year with almost no increase can mean the car was off the road, which is worth matching to the gap in tests. And a reading that sits level for two tests in a row, with the same number repeated, deserves a question, because a car in use rarely records exactly the same mileage twice. Our free mileage check does this arithmetic and flags falls, big jumps and long stalls, but it is based on MOT readings only and cannot prove clocking.

Six steps for reading any history

Use the sequence above whenever you open a new record. It keeps you from jumping to a conclusion on the first odd line, and it makes sure you look at the whole picture before you contact the seller.

Red flags to look for

1. A mileage fall between tests. The odometer should only go up. A drop needs an explanation, and the seller should be able to give one in writing, such as a replacement instrument cluster with an invoice.
2. The same fail repeating. If the brakes, suspension or emissions fail every other year, the repair may not have addressed the cause.
3. A long gap between tests. A year with no MOT can mean the car was off the road, abroad, or driven without a test. Ask why.
4. Failures that mention structural corrosion. Wording varies, but entries about corrosion in structural areas such as sills or subframes deserve a thorough inspection underneath. Structural rust is costly to fix correctly.
5. Many advisories on the same item. An advisory means the part is not yet defective but will become so soon. Repeated advisories on tyres, brakes or suspension show a car that is being run on its limits.
6. A flat or tiny mileage for the age. Very low annual mileage can be genuine, but check it against the service history, the wear on pedals and seats and the condition of the car.
7. A dangerous defect that is not followed by a repair record. If the car was marked dangerous and the next entry is years later, ask what happened.
8. Vehicle details that differ from the car. Colour, fuel type or engine size that do not match the record can point to an error, a change that was never recorded, or a car that is not what it claims to be.
9. Tests that start late. For most cars, the first test is due by the third anniversary of registration. A first record much later than that needs an explanation.

Reasons that are innocent

Not every oddity is a warning. A good reader keeps the benign explanations in mind so that a sensible seller is not accused of something they did not do.

• A mileage fall can come from a typing error by the tester, such as a missed digit. If the next reading continues the earlier trend, a one-off error is the likeliest cause.
• A replacement instrument cluster can reset the displayed mileage. This is legitimate if documented, and a garage invoice or dealer record should exist.
• A gap can mean the car was laid up, off the road with a SORN, or kept abroad. Our SORN check shows whether a car is currently declared off the road.
• A change of colour can be a respray or a wrap. Ask when it was done and by whom.
• A long-running “slight” leak or similar advisory may simply be stable. The question is whether anyone has looked at it recently.

Even so, the burden is on the seller to explain, and your protection is the written answer.

What “No results returned” means

The message appears when the official data holds no MOT result for the registration. It does not necessarily mean something is wrong. Common reasons:

• The car is under three years old and has not had its first MOT yet.
• The car is exempt from the MOT, for example a vehicle over 40 years old that qualifies for the historic exemption. See MOT exempt vehicles.
• The vehicle is registered in Northern Ireland, where the tests are held by a separate body.
• The registration was typed wrongly, or the plate has been transferred or changed.
• It is the type of vehicle that takes a different test, such as a lorry, bus or trailer.

If the car is over three years old, not exempt and the checker shows nothing, treat it as a reason to ask questions. Check the number plate against the V5C and the VIN on the car. Our guide to the number plate format helps you tell which year a plate suggests, which is a quick way to test whether “under three years old” is a plausible explanation.

Government vehicle records also use similar wording for MOT status. The DVLA data can describe an MOT as valid, not valid, no details held by DVLA, or no results returned. Each wording means something different, which is why it is worth reading the status line and the history together.

Special cases

Cars, vans and motorcycles

The same fields appear whatever the vehicle. For a van, see the van MOT check, and for a bike the motorcycle MOT check. Cars have a dedicated car MOT check. The class of vehicle decides the test, as explained in MOT test classes.

Very old vehicles

A vehicle built or first registered more than 40 years ago, with no substantial changes, can be exempt, so its history may be short or empty. Many owners still test voluntarily, which gives a useful record. The historical MOT check page explains how to read older records.

Northern Ireland

Northern Ireland tests are run by DVA and do not appear in the Great Britain history. Our guide to MOT in Northern Ireland explains the difference.

Using the history as an owner or seller

The history is not only a buyer’s tool. As an owner, it tells you what the next test is likely to find. Read the advisories from the last test, price the work before the test, and fix the cheap items first. The advisory tracker follows each advisory through the years so you can see which are still open. Our guides on MOT failure reasons and how to prepare for an MOT show how to deal with each area.

As a seller, remember that a buyer can see everything you can see. Describing the car honestly and keeping invoices for repairs makes the history work in your favour. The seller claim checker compares what an advert says with the official record, which is the same comparison a careful buyer will make. If you have a car you are watching, the free car watchlist emails when a new MOT result is recorded.

What our free tools show and what they cannot

What the history cannot tell you

An MOT history is a record of road safety tests on given days. It does not tell you the condition of the engine or gearbox, whether the car has been in an accident, whether the previous owners kept up with servicing, or whether the car is subject to outstanding finance. It also does not include stolen or write-off information. The tester only sees the car on the day, and advisories depend on what that tester notices. A car can pass with a very worn clutch, a tired gearbox or past accident damage, because none of these is a test item in itself.

Combine the history with other checks

• Run the vehicle check to confirm make, model, colour, fuel type, tax and MOT status match what you were told.
• Check tax status and SORN status.
• Use the free mileage check to see the readings charted.
• If you are choosing between two cars, the compare cars tool puts two records side by side.
• For a single PDF with the full timeline, mileage analysis and a plain-English risk summary, the Full Vehicle Report costs £3.99. It does not cover finance, stolen or write-off data.
• Work through the complete used car checklist before you pay.

Common mistakes when reading a history

• Reading only the latest test and ignoring the years behind it.
• Treating a pass as proof of a sound car, when it records only the day of the test.
• Comparing miles with kilometres without converting.
• Ignoring advisories because the car passed.
• Accepting a mileage fall with a verbal explanation and no paperwork.
• Forgetting that Northern Ireland tests are held separately.
• Assuming that “No results returned” always means a problem, or never means one.
• Relying on the history alone without seeing the V5C and the car itself.

Glossary

Advisory

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

Dangerous defect

A defect that is a direct and immediate risk to road safety or the environment. The vehicle fails and must not be driven.

DVA

The body that runs vehicle testing in Northern Ireland, separate from the Great Britain MOT service.

DVSA

The agency that runs the MOT scheme in England, Scotland and Wales and holds the test records.

Expiry date

The last day the MOT certificate is valid.

Major defect

A defect serious enough to fail the test.

Minor defect

A defect present but not serious enough to fail the test.

Odometer

The instrument that records distance travelled, in miles or kilometres.

PRS

Pass after rectification at the test: a defect put right during the test.

V5C

The vehicle registration certificate, often called the log book.

VIN

The vehicle identification number, unique to each vehicle.

Sources and further reading

• GOV.UK: Check MOT history of a vehicle
• GOV.UK: Getting an MOT
• GOV.UK: MOT test fee, MOT test results and failed vehicles pages
• DVSA: MOT history API documentation (field names and categories)
• DVSA: MOT testing guide and inspection manual