At a glance
How 4,293 first tests went in 2025.
- Passed first time
- 75 in every 100
- Did not pass first time
- 25 in every 1001,087 failed first-attempt tests
- The typical car
- 10 yearsabout 76,218 miles
- First tests counted
- 4,293
What failed most often
- Handbrake efficiency below minimum (roller test)12 in every 100 failed tests
- Brake pads (rear)11 in every 100 failed tests
- Track rod end (front)10 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 Mitsubishi ASX 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.
Suspension
Two faults. The strongest is the anti-roll bar pins and bushes (rear): 51 times as often as on similar cars.
Figures below are measured across the 1,086 of 1,087 failed first attempts (99.9%) 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.
Anti-roll bar pins and bushes (rear)
What it means
An anti-roll bar pin or bush that is excessively worn is Major, and one likely to become detached is graded Dangerous. The wording is DVSA's general rule for a suspension pin, bush or joint.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 32 first tests, 24 times as often as on similar cars.
Anti-roll bar linkage ball joints (front)
What it means
Excessive wear on an anti-roll bar linkage ball joint is Major. A joint likely to become detached is graded Dangerous.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Brakes
Four faults and one wear pattern. The strongest is the rigid brake pipes (rear): 10 times as often as on similar cars.
Rigid brake pipes (rear)
What it means
Chafing, corrosion or damage to a rigid brake pipe justifies rejection once its wall thickness is reduced by a set amount, although DVSA accepts this is not easy to determine. If a tester is not sure, the benefit of the doubt applies. A leaking pipe or connection is graded Dangerous on a hydraulic system and Major on an air system.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 145 first tests, 6.8 times as often as on similar cars.
Rigid brake pipes (front)
What it means
Chafing, corrosion or damage to a rigid brake pipe justifies rejection once its wall thickness is reduced by a set amount, although DVSA accepts this is not easy to determine. If a tester is not sure, the benefit of the doubt applies. A leaking pipe or connection is graded Dangerous on a hydraulic system and Major on an air system.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 96 first tests, 5.8 times as often as on similar cars.
Handbrake performance (roller test, rear)
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 pads (rear)
What it means
A pad worn down to its wear indicator, or contaminated with oil or grease, is Major. A pad worn below the set thickness limit, missing or incorrectly mounted is Dangerous. The manual treats an illuminated brake wear indicator as no reason for failure, although DVSA also lists an illuminated indicator as a Major row.
Also noted as an advisory
Testers also noted it as an advisory, worn but not yet failing, on 134 first tests, 2.3 times as often as on similar cars.
Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.
Steering
One fault: track rod end (front), 2.0 times as often as on similar cars.
Track rod end (front)
What it means
A steering ball joint with excessive wear or free play is Major, and one worn to the extent there is a serious risk of detachment is graded Dangerous. A dust cover that is damaged but still keeps dirt out is Minor, and one missing or no longer keeping dirt out is Major. Testers must tell wear from a joint's built-in clearance or spring loading.
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.
Suspension arm (front)
Suspension sub-frame (rear)
Coil spring (front)
Suspension sub-frame (front)
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
- 75in every 100
- Passed on the first test.
- Fixed at the station
- 3in every 100
- Failed, then fixed at the test station the same day.
- Failed
- 22in every 100
- Did not pass, and were not fixed at the test station.
First-attempt pass 74.7% of 4,293 first tests (2025): only cars that passed first time count. Official-style pass 78.1%: cars fixed at the test station also count as a pass. The 3 fixed and the 22 not fixed make the 25 in every 100 that did not pass first time.
Petrol and diesel
Figures are in every 100 first tests. Cars with more miles usually fail more often, so the same-mileage figure gives every fuel the mileage mix of all the cars in this year.
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 |
|---|---|---|
| 2010 | 60 in every 100 | 1,330 |
| 2011 | 62 in every 100 | 1,815 |
| 2012 | 66 in every 100 | 1,909 |
| 2013 | 64 in every 100 | 2,247 |
| 2014 | 68 in every 100 | 3,515 |
| 2015 This car | 75 in every 100 | 4,293 |
| 2016 | 78 in every 100 | 3,059 |
| 2017 | 79 in every 100 | 3,837 |
| 2018 | 84 in every 100 | 2,125 |
| 2019 | 90 in every 100 | 1,551 |
| 2020 | 90 in every 100 | 1,428 |
| 2021 | 90 in every 100 | 490 |
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 Mitsubishi ASX.
Of 2015 Mitsubishi ASX vehicles with under 55,000 miles, 86 in every 100 passed their 2025 MOT first time. With 101,000 miles or more, 64 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 55,000 | 70,000–83,000 | 101,000 and over | |
|---|---|---|---|
| Handbrake efficiency below minimum (roller test) | 1.2 | 2.9 | 5.4 |
| Brake pads (rear) | 1.1 | 3.3 | 3.9 |
| Track rod end (front) | 0.5 | 2.8 | 4.3 |
| Rigid brake pipes (rear) | 1.1 | 1.7 | 2.5 |
| Suspension arm ball joint (front) | 0.1 | 2.2 | 3.3 |
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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