What's in a full MOT history by reg
An MOT history check gives you a year-by-year record of a vehicle's condition, written by the people who inspected it. A seller can repaint a bumper or clean an engine bay, but they can't edit what testers recorded in previous years.
For each test on record you'll see:
- The test date and result: pass or fail, including any retest on the same visit.
- The expiry date of the certificate issued after a pass.
- The odometer reading, in miles or kilometres as recorded at the time.
- Every defect and advisory, with its severity and the tester's description.
- The test number, which identifies that specific inspection.
PlateWise lays these out as a timeline, newest first, and lets you filter to just the fails or just the tests with advisories. When you have ten years of records, that filter saves a lot of scrolling.
Using an MOT history checker
An MOT history checker reads the same record that test centres write to. Car MOT history goes back to 2005 in Great Britain, so a full MOT check history usually covers most of a used car's life. All you need is the number plate: no logbook, and no permission from the owner.
MOT checker: history, advisories and mileage
Read the three together. The pass and fail dates show how the car was kept up, the advisories show what was wearing out, and the mileage at each test shows how hard it was used and whether the readings make sense.
How to read MOT test results
Individual results tell you little. The pattern across several years tells you a lot. Here's how to read the common sequences.
A fail followed quickly by a pass
This is the most common pattern and usually reassuring. The garage found a fault, the owner paid for the repair and the car passed within days. Look at what failed: a blown bulb is trivial, while a corroded brake pipe tells you the car was due serious work.
Several fails in one year
Two or three failed attempts before a pass can mean the owner shopped around or patched problems as cheaply as possible. It isn't automatically bad, but it's worth asking which garage finally passed it and what was done.
A gap in the record
A missing year might mean the car was declared off the road, laid up during a long trip abroad, or simply driven without an MOT. Ask the seller directly. A SORN declaration is easy to explain; an unexplained gap is not.
Tests in unusual months
If a car's MOT has always fallen in June and then suddenly moves to November, the certificate probably lapsed and the clock restarted from a fresh test. That fits with a period off the road, so check it against the tax history.
Red flags to look for in MOT test results
Most histories are uneventful. These are the patterns that should make you slow down before buying:
| What you see | What it might mean | What to ask |
|---|---|---|
| The same advisory three years running | A known problem that was never fixed | Has it been repaired since? Is there an invoice? |
| Mileage lower than the previous test | Clocking, a replaced instrument cluster, or a typing error | Is there paperwork for a dashboard replacement? |
| Dangerous defect on the latest test | The car was unsafe very recently | Who fixed it, and can I see the receipt? |
| Structural corrosion mentioned | Rust in load-bearing areas, which is costly to repair | Has a welder looked at it? Any photos? |
| Very low mileage between tests | Short trips, storage or a second car | How has it been used and stored? |
| No MOT for over a year | Off the road, abroad or used illegally | Was it SORN? Where was it kept? |
How far back does MOT history go?
Computerised MOT records in Great Britain started in 2005, so most vehicles on the road today have a complete digital history. Tests before 2005 were recorded on paper certificates and aren't in the online database. For an older classic, ask the owner for the original paper certificates. Many enthusiasts keep them in a folder with the service book.
Vehicles registered in Northern Ireland are tested by a separate agency, so their history may be incomplete or missing. Imported vehicles only start building a record once they're registered and tested in Great Britain.
Records before May 2018
A worked example: reading one car's history
Imagine a nine-year-old hatchback with seven MOTs on record. The first four are clean passes, with mileage rising by around 8,000 a year. In year five, a tester notes “front brake discs worn” as an advisory. In year six the same advisory appears again, alongside a worn front tyre. In year seven the car fails on the brake discs, then passes three days later.
What does that tell you? The car was used steadily and maintained to a reasonable standard, but the owner put off the brake work until it became a fail. That isn't a reason to walk away, because the discs are now new. It does tell you to look closely at the other consumables. If the tyres were left until the last minute too, check their age and tread at the viewing, and budget for a set if they're close to the limit.
Now picture the same car with mileage that jumps from 64,000 to 31,000 between years six and seven. The story changes completely. That's a question about the car's identity and honesty, not its maintenance, and our mileage check flags it automatically.
What MOT history can't tell you
An MOT is a snapshot of minimum standards on one day a year. It doesn't inspect the clutch, the gearbox internals or the condition of the engine, and it can't predict a failure next week. It also says nothing about money owed on the car, previous accident damage repaired to a passable standard, or how many people have owned it. Use the history as one strong piece of evidence alongside a test drive, the paperwork and, for anything expensive, an independent inspection. A quick reg check also confirms the basic vehicle details match the advert.
Check MOT history before you buy
The best time to check MOT history is before you arrange a viewing. If the history raises questions, you can ask them over the phone and save yourself a wasted journey. If it's clean, you'll arrive knowing which components to look at closely, because the last test told you where the wear is.
A sensible routine for a used-car purchase:
- Run the MOT history check as soon as you see the advert.
- Compare the recorded mileage with the advertised mileage. Our mileage check charts every reading.
- List the advisories from the last two tests and ask the seller what's been done about each one.
- Confirm the car's status with a car tax check so you know whether it can be driven away legally once you've taxed it in your name.
- At the viewing, inspect the areas the testers flagged.
Using your own MOT history when selling
Buyers will look you up, so get there first. Run a check on your own car before listing it. If there's an advisory you've since fixed, keep the invoice ready, because it turns a potential worry into evidence of a careful owner. Mention recent repairs in the advert. A clean, well-documented history can justify a stronger asking price.
MOT history vs service history
These are often confused, but they record different things. The MOT is a legal safety and emissions inspection. A service is maintenance: oil, filters, fluids and wear items replaced on a schedule set by the manufacturer.
- MOT history is public, independent and centrally recorded. It shows condition at a point in time.
- Service history is held by the owner or garages. It shows what work was done, but it can be incomplete, and paper stamps can be forged.
A car with a full service history and a clean MOT record is the ideal. A car with a strong MOT record but patchy servicing can still be a good buy, provided you budget for an immediate service.
To read a history step by step, follow our guide to reading MOT history before buying. To understand the notes they leave, our MOT advisories check breaks down each category.