2015 BMW 3 Series — MOT failures & pass rate
Across 181,444 MOT tests, the 2015 BMW 3 Series recorded an 87.7% pass rate. Executive cars of a similar age fail 14.1% of the time, so this is 1.7pp better than the group it competes with. Failures cluster in tyres, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — tyres (6.3%) and lighting & signalling (5.7%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, headlamp aim and brake pads — tread depth alone was recorded 6,041 times.
A 150k+ example is materially riskier than a 0-30k one: 16.7% versus 5.9%.
Split by fuel, diesel examples fail 2.1pp more often than petrol ones (12.6% vs 10.5%) — worth weighing if you have a choice.
Advisories point at the next bill rather than this one: tyres was flagged on 22.9% of tests without failing them.
The trend is worsening — 10.8% of tests failed in 2021 against 14.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.3% | 11,381 |
| 2 | Lighting & signalling | 5.7% | 10,414 |
| 3 | Brakes | 2.7% | 4,908 |
| 4 | Visibility | 1.8% | 3,299 |
| 5 | Suspension | 1.8% | 3,188 |
| 6 | Road wheels | 0.7% | 1,192 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 6,041 |
| 2 | Headlamp aim | 5,370 |
| 3 | Brake pads | 3,551 |
| 4 | Position lamp | 2,936 |
| 5 | Headlamp | 2,776 |
| 6 | Washers | 2,492 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 22.9% | 41,501 |
| 2 | Brakes | 16.7% | 30,220 |
| 3 | Other defects | 8.1% | 14,682 |
| 4 | Suspension | 6.4% | 11,556 |
| 5 | Visibility | 3.6% | 6,530 |
| 6 | Emissions & environmental | 3.0% | 5,410 |
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 | 5,990 | 5.9% |
| 30-60k | 46,833 | 9.4% |
| 60-90k | 66,123 | 12.3% |
| 90-120k | 39,685 | 14.7% |
| 120-150k | 15,642 | 15.6% |
| 150k+ | 7,154 | 16.7% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 157,474 | 12.6% |
| Petrol | 23,961 | 10.5% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 36,791 | 10.8% |
| 2022 | 36,450 | 11.5% |
| 2023 | 36,229 | 12.1% |
| 2024 | 36,086 | 13.1% |
| 2025 | 35,888 | 14.1% |
What to check before buying a 2015 3 Series
On a 2015 3 Series, tyres is what the MOT record says goes wrong most — it appeared in 6.3% of tests. Check these areas before you commit.
- Tyres (6.3% 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.
- Lighting & signalling (5.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (2.7% 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 BMW 3 Seriess pass their MOT?
87.7% of the 181,444 2015 BMW 3 Series MOT tests in this dataset passed — a 12.3% fail rate.
What is the most common MOT failure on a 2015 BMW 3 Series?
Tyres, recorded in 6.3% of tests, followed by lighting & signalling (5.7%).
Does the 2015 3 Series get worse with mileage?
Its MOT fail rate rises from 5.9% in the 0-30k band to 16.7% in the 150k+ band.
Methodology & source. Based on 181,444 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.