2015 MG MG6 — MOT failures & pass rate
Across 2,621 MOT tests, the 2015 MG MG6 recorded a 77.5% pass rate. All cars of a similar age fail 16.1% of the time, so this is 6.4pp worse than the group it competes with. Failures cluster in lighting & signalling, tyres and brakes.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 13.7% of tests against 8.7% for the next-worst category.
At component level the recurring items are rigid brake pipes, headlamp aim and headlamp — rigid brake pipes alone was recorded 174 times.
Condition tracks the odometer closely. Failures run at 10.6% in the 0-30k band and 14.9% in the 120-150k band, a 4.3-point spread.
Brakes is the most common advisory, noted on 35.0% of tests — work that passed today but is likely due soon.
The trend is worsening — 20.8% of tests failed in 2021 against 23.8% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 13.7% | 360 |
| 2 | Tyres | 8.7% | 228 |
| 3 | Brakes | 8.7% | 228 |
| 4 | Suspension | 4.8% | 125 |
| 5 | Visibility | 3.7% | 98 |
| 6 | Emissions & environmental | 2.6% | 69 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Rigid brake pipes | 174 |
| 2 | Headlamp aim | 153 |
| 3 | Headlamp | 133 |
| 4 | Tread depth | 123 |
| 5 | Brake pads | 103 |
| 6 | Position lamp | 83 |
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 | 35.0% | 918 |
| 2 | Tyres | 30.1% | 790 |
| 3 | Suspension | 18.6% | 488 |
| 4 | Other defects | 7.5% | 197 |
| 5 | Emissions & environmental | 6.2% | 162 |
| 6 | Lighting & signalling | 5.6% | 146 |
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 | 141 | 10.6% |
| 30-60k | 978 | 21.1% |
| 60-90k | 1,088 | 23.6% |
| 90-120k | 359 | 28.1% |
| 120-150k | 47 | 14.9% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 605 | 20.8% |
| 2022 | 570 | 21.9% |
| 2023 | 554 | 22.9% |
| 2024 | 493 | 23.5% |
| 2025 | 399 | 23.8% |
What to check before buying a 2015 MG6
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 13.7% of tests. Start there.
- Lighting & signalling (13.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (8.7% 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.
- Brakes (8.7% 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.
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 MG MG6s pass their MOT?
77.5% of the 2,621 2015 MG MG6 MOT tests in this dataset passed — a 22.5% fail rate.
What is the most common MOT failure on a 2015 MG MG6?
Lighting & signalling, recorded in 13.7% of tests, followed by tyres (8.7%).
Does the 2015 MG6 get worse with mileage?
Its MOT fail rate rises from 10.6% in the 0-30k band to 14.9% in the 120-150k band.
Methodology & source. Based on 2,621 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.