At a glance
How 21,555 first tests went in 2025.
- Passed first time
- 76 in every 100
- Did not pass first time
- 24 in every 1005,149 failed first-attempt tests
- The typical car
- 10 yearsabout 48,036 miles
- First tests counted
- 21,555
What failed most often
- Windscreen washers9 in every 100 failed tests
- Brake light9 in every 100 failed tests
- Handbrake efficiency below minimum (roller test)9 in every 100 failed tests
How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.
These are patterns across 2015 Hyundai i10 vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. A wear pattern follows age and use more than the way the car was built. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.
Brakes
Four faults and one wear pattern. The strongest is the brake discs (rear): 5.5 times as often as on similar cars.
Figures below are measured across the 5,148 of 5,149 failed first attempts that recorded an odometer reading in 2025. Mileage is needed to compare like with like.
We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.
Brake discs (rear)
What it means
A brake disc or drum must be significantly worn before it is rejected, and being worn below the manufacturer's recommended limits is not a reason in itself. Significantly and obviously worn is Major, as is contamination with oil or grease. A disc or drum that is fractured, insecure, seriously weakened or missing is graded Dangerous.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 1,013 first tests, 3.1 times as often as on similar cars.
Anti-lock braking system (ABS)
What it means
ABS is failed as removed only where it has obviously been removed, because not every vehicle in the age range where removal is not permitted has ABS. A warning lamp that does not light or shows an ABS fault is Major, as is a missing or excessively damaged wheel speed sensor. Every failure row for this component is Major.
Handbrake efficiency below minimum (roller test)
What it means
A parking brake with efficiency below the minimum requirement is Major, and graded Dangerous where efficiency is less than half of the required value. On a roller brake tester, the requirement counts as met if more than half of the wheels of a brake system lock. The check applies only to vehicles whose parking brake was not already tested as the secondary brake.
Brake performance (roller test, rear)
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 226 first tests, 2.5 times as often as on similar cars.
Electronic stability control
What it means
An ESC warning lamp is failed only when the tester is certain it indicates an ESC malfunction, because the lamp takes various forms and the owner's handbook may need checking. The system is also called ESP, VDC or DSC, among many other names. Every failure row is Major, covering the lamp, wheel speed sensors, wiring, other components and the switch.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Lamps and electrical
One fault: brake light (rear), 2.9 times as often as on similar cars.
Brake light (rear)
What it means
All stop lamps missing or not working is graded Dangerous, and so is a stop lamp that stays on when the brakes are released. A stop lamp that is missing or not working is Major. On some vehicles with LED rear lamps, part of the stop lamp can go out when the rear fog lamp is lit, which is not regarded as a defect.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.
Visibility
One fault: windscreen washers (front), 2.3 times as often as on similar cars.
Windscreen washers (front)
What it means
Windscreen washers that are not working, or do not provide sufficient fluid to clear the windscreen, are graded Major. They must provide enough fluid for the wipers to clear the windscreen effectively. Vehicles with an opening windscreen, or some other adequate view to the front, left and right, are not inspected for washers.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.
Advisories
Other things testers noted as worn or close to failing, more often than on similar cars.
An advisory is a note from the tester about something that has not failed yet. It is an early warning, not a fail. Advisories for the faults above are shown with those faults.
Seat belt condition (rear)
Side repeater indicators
Headlight (front)
Brake pedal
Brake performance (plate test, rear)
Data: UK MOT open data, 2025. Counts cover advisories recorded on failed first tests only, compared with cars of the same age and mileage.
MOT pass rates
How first tests ended, and how the pass rates are counted.
- Passed first time
- 76in every 100
- Passed on the first test.
- Fixed at the station
- 6in every 100
- Failed, then fixed at the test station the same day.
- Failed
- 18in every 100
- Did not pass, and were not fixed at the test station.
First-attempt pass 76.1% of 21,555 first tests (2025): only cars that passed first time count. Official-style pass 82.1%: cars fixed at the test station also count as a pass. The 6 fixed and the 18 not fixed make the 24 in every 100 that did not pass first time.
Same model, other years
Passed first time in every 100, all tested in 2025.
Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 77 in every 100 passed first time.
| Year | Passed first time | First tests |
|---|---|---|
| 2008 | 55 in every 100 | 4,181 |
| 2009 | 58 in every 100 | 17,479 |
| 2010 | 62 in every 100 | 17,362 |
| 2011 | 63 in every 100 | 16,019 |
| 2012 | 62 in every 100 | 19,089 |
| 2013 | 63 in every 100 | 19,598 |
| 2014 | 71 in every 100 | 22,080 |
| 2015 This car | 76 in every 100 | 21,555 |
| 2016 | 80 in every 100 | 21,548 |
| 2017 | 81 in every 100 | 23,091 |
| 2018 | 80 in every 100 | 20,594 |
| 2019 | 82 in every 100 | 17,682 |
| 2020 | 87 in every 100 | 6,192 |
| 2021 | 85 in every 100 | 7,840 |
| 2022 | 84 in every 100 | 8,288 |
If you are buying one
What this year's MOT record means for the decision in front of you.
Mileage matters most on a 2015 Hyundai i10.
Of 2015 Hyundai i10 vehicles with under 29,000 miles, 84 in every 100 passed their 2025 MOT first time. With 71,000 miles or more, 66 in every 100 did.
What to check at your mileage
How often each fault turned up on a failed first test, by the car's mileage. Read it as: what is likely to need looking at on a car like the one in front of you.
| Under 29,000 | 42,000–55,000 | 71,000 and over | |
|---|---|---|---|
| Windscreen washers | 1.5 | 2.1 | 3.1 |
| Brake light | 0.8 | 2.1 | 3.2 |
| Handbrake efficiency below minimum (roller test) | 0.9 | 1.6 | 3.9 |
| Tyre pressure monitoring system | 1.4 | 1.9 | 2.2 |
| Tyre tread depth (front) | 0.5 | 2.0 | 3.0 |
Faults per 100 first tests, by the car's mileage at the test.
When a car fails
of failed cars had one item to fix.
of failed cars had three or more items to fix.
of all first tests had a defect the tester marked dangerous (unsafe to drive away).
Every figure here is a first-attempt MOT rate from DVSA open data for this model line, for cars of this model year tested in 2025. Each mileage band holds a fifth of the tests. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.
FAQs
Short answers about how to read this model-year guide.
About this data
How this page is built and what it can (and can't) say.
These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.
What we include
UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.
Same-day repairs
PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.
How we compare
We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.
What this does not cover
- MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
- Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
- Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
- If the data for a car is too thin to say anything useful, we say so rather than guess.
Contains public sector information licensed under the Open Government Licence v3.0.
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