How we count
Every figure on our model pages comes from the DVSA's anonymised MOT test data for 2025. We publish the definitions so you can see what a number means. The figures are for guidance only: they describe all cars of a model and year, not the one you're looking at.
The data
The DVSA publishes a record of every MOT test in Great Britain each year, with the registration removed. We use the most recent complete year, currently 2025. Each page shows the number of tests behind it.
Definitions
| Tests included | Class 4 vehicles (cars, passenger vehicles with up to 8 seats, goods vehicles up to 3,000 kg). First tests only, not retests. Tests that were abandoned or aborted are left out. |
|---|---|
| Same model | Make, model and the year the car was first used, as the DVSA records them. Vehicles with an unknown make or an unknown first-use date are left out. |
| First-time pass rate | Tests passed with no repairs, divided by all first tests. A car that failed and was repaired at the test centre within an hour (recorded as PRS) counts as a fail, as in the DVSA's own figures. |
| All cars from that year | The same rate for every class 4 vehicle first used in the same year. Older cars fail more often, so we compare a model only with cars of the same age. |
| Failure areas | Of the first tests that failed, the share with at least one failure item in each area. A test can fail in several areas, so the shares add up to more than 100%. Areas are the DVSA's own top-level groups from the MOT inspection manual. |
| Typical mileage | The median odometer reading at the first test, in miles. Missing and zero readings are left out. |
| Minimum sample | We only publish a model year with at least 1,000 first tests, and only show a failure area with at least 50 failed tests in it. |
Failure areas we report
- Number plates and VIN (DVSA: Identification of the vehicle)
- Brakes (DVSA: Brakes)
- Steering (DVSA: Steering)
- Windscreen, wipers, mirrors (DVSA: Visibility)
- Lights and electrics (DVSA: Lamps, reflectors and electrical equipment)
- Suspension (DVSA: Suspension)
- Body, chassis, structure (DVSA: Body, chassis, structure)
- Speedometer and speed limiter (DVSA: Speedometer and speed limiter)
- Seat belts and airbags (DVSA: Seat belts and supplementary restraint systems)
- Noise, emissions, leaks (DVSA: Noise, emissions and leaks)
- Bus and coach checks (DVSA: Buses and coaches supplementary tests)
- Seat belt installation (DVSA: Seat belt installation check)
- Wheels (DVSA: Road Wheels)
- Tyres (DVSA: Tyres)
Licence
Contains public sector information licensed under the Open Government Licence v3.0.