Safe Car Check
Every MOT test in Great Britain is logged by the DVSA: the result, the mileage, what failed and what the tester advised. You can read it free on GOV.UK with just the registration, and a Safe Car Check report includes it in full with the readings charted. The trick is knowing what to look for.
Start with the mileage column
Read the mileage at every test from oldest to newest. It should rise steadily, roughly 6,000 to 12,000 miles a year for a typical private car, more for an ex-fleet or ex-taxi vehicle.
- A reading that goes down and stays down is the classic sign of clocking. One odd reading sandwiched between two consistent ones is more likely a typing error by the tester.
- A sudden flat line after years of heavy use means the car was either parked up or the odometer stopped recording. Ask which.
- Very high annual mileage that drops sharply when the car changed hands can mean a former fleet car with a wound-back clock.
Pass, fail, and what "fail then pass the same day" means
A fail followed by a pass on the same day or the next day is normal: the garage fixed the fault and retested. Look at what failed. A bulb or a wiper blade is nothing. A failure for corrosion of a structural member, or for the same brake or suspension component three years running, is a car that has been patched rather than fixed.
Dangerous, major and minor defects
Since May 2018 every fault is graded, and the grade matters more than the word "fail".
| Grade | Meaning | Result |
|---|---|---|
| Dangerous | A direct and immediate risk to road safety or the environment. | Fail. Must not be driven until repaired. |
| Major | May affect safety, put other road users at risk or harm the environment. | Fail. |
| Minor | No significant effect on safety, but should be repaired soon. | Pass, with the defect recorded. |
| Advisory | Something to monitor that may become a defect later. | Pass, with the note recorded. |
Advisories are the real story
Sellers love a clean pass. The advisories underneath are where you learn what the car actually needs. A few things to look for:
- Corrosion advisories, especially on the subframe, sills, brake pipes or suspension arms. These rarely get better and can become a structural failure.
- Tyres "close to legal limit" on last year's test means you are probably buying four tyres.
- Oil leaks that appear year after year suggest nobody has fixed the source.
- Advisories that vanish without a matching repair may mean the car went to a different, friendlier tester.
Gaps, SORN and exemptions
A missing year can be innocent: the car was declared off the road, or taken abroad. It can also mean it was driven illegally, or sat broken until someone bought it cheap and patched it up. Ask. A cheap older car with a brand new MOT and a long gap before it deserves a careful look. Most cars over 40 years old can be exempted from the MOT if they have not been substantially changed, so a blank recent history on a classic is often normal.
The test centre matters too
GOV.UK can show which garage carried out each test if you enter the reference number from the V5C, so ask the seller for it. A dealer who always uses the same small garage for a pre-sale pass is not necessarily doing anything wrong, but a mix of independent test centres over the years is reassuring. A car that has only ever been tested by the garage now selling it is worth an independent inspection.
What the MOT history cannot tell you
The MOT is a snapshot of roadworthiness on one day a year. It says nothing about outstanding finance, whether the car is recorded as stolen, or whether an insurer has written it off, and those are the three things that can cost you the whole car rather than a repair bill. A vehicle history check pulls the MOT record together with those three checks in a single report.
