2015 Mitsubishi Asx — MOT failures & pass rate
26,493 MOT tests on the 2015 Mitsubishi Asx are in this dataset, and 85.3% of them passed. That is 1.7 percentage points better than small SUVs of a similar age, which fail at 16.4%. Failures cluster in brakes, tyres and suspension.
What the MOT record shows
Brakes dominates the failure mix at 7.3% of all tests — 3.3 points clear of tyres, so it is the first thing to check.
At component level the recurring items are brake pads, rigid brake pipes and tread depth — brake pads alone was recorded 990 times.
Mileage is the strongest signal on the record: 7.8% of 0-30k cars fail, rising to 27.7% once past 150k — 3.6× the risk.
Fuel type barely separates them — petrol fails 14.3% of the time against 14.9% for diesel.
Advisories point at the next bill rather than this one: brakes was flagged on 29.7% of tests without failing them.
The trend is worsening — 11.1% of tests failed in 2021 against 18.2% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 7.3% | 1,937 |
| 2 | Tyres | 4.0% | 1,054 |
| 3 | Suspension | 3.4% | 912 |
| 4 | Lighting & signalling | 3.2% | 855 |
| 5 | Visibility | 3.2% | 848 |
| 6 | Steering | 1.2% | 309 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Brake pads | 990 |
| 2 | Rigid brake pipes | 850 |
| 3 | Tread depth | 732 |
| 4 | Wipers | 679 |
| 5 | Rbt (sp) | 575 |
| 6 | Headlamp aim | 454 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 29.7% | 7,870 |
| 2 | Tyres | 24.0% | 6,364 |
| 3 | Suspension | 10.5% | 2,783 |
| 4 | Other defects | 8.2% | 2,164 |
| 5 | Visibility | 3.4% | 907 |
| 6 | Steering | 2.7% | 708 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 1,850 | 7.8% |
| 30-60k | 10,449 | 11.5% |
| 60-90k | 9,618 | 16.3% |
| 90-120k | 3,555 | 20.4% |
| 120-150k | 814 | 23.8% |
| 150k+ | 206 | 27.7% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 16,759 | 14.9% |
| Petrol | 9,728 | 14.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 5,160 | 11.1% |
| 2022 | 5,238 | 12.3% |
| 2023 | 5,350 | 15.0% |
| 2024 | 5,374 | 16.6% |
| 2025 | 5,371 | 18.2% |
What to check before buying a 2015 Asx
On a 2015 Asx, brakes is what the MOT record says goes wrong most — it appeared in 7.3% of tests. Check these areas before you commit.
- Brakes (7.3% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
- Tyres (4.0% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Suspension (3.4% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2015 Mitsubishi Asxs pass their MOT?
85.3% of the 26,493 2015 Mitsubishi Asx MOT tests in this dataset passed — a 14.7% fail rate.
What is the most common MOT failure on a 2015 Mitsubishi Asx?
Brakes, recorded in 7.3% of tests, followed by tyres (4.0%).
Does the 2015 Asx get worse with mileage?
Its MOT fail rate rises from 7.8% in the 0-30k band to 27.7% in the 150k+ band.
Methodology & source. Based on 26,493 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.