2015 BMW 1 Series — MOT failures & pass rate
The 2015 BMW 1 Series passed 86.3% of its 183,970 recorded MOT tests. Small family cars of a similar age fail 15.5% of the time, so this is 1.8pp 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 (6.5%) and lighting & signalling (6.2%) 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 7,262 times.
Mileage is the strongest signal on the record: 6.6% of 0-30k cars fail, rising to 18.9% once past 150k — 2.9× the risk.
Split by fuel, diesel examples fail 2.5pp more often than petrol ones (14.5% vs 12.0%) — worth weighing if you have a choice.
Advisories point at the next bill rather than this one: tyres was flagged on 24.4% of tests without failing them.
The trend is worsening — 12.1% of tests failed in 2021 against 15.2% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.5% | 11,928 |
| 2 | Lighting & signalling | 6.2% | 11,450 |
| 3 | Brakes | 3.2% | 5,900 |
| 4 | Visibility | 3.1% | 5,628 |
| 5 | Suspension | 1.3% | 2,419 |
| 6 | Emissions & environmental | 1.1% | 2,070 |
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 | 7,262 |
| 2 | Headlamp aim | 5,687 |
| 3 | Brake pads | 4,623 |
| 4 | Washers | 4,531 |
| 5 | Headlamp | 3,401 |
| 6 | Position lamp | 2,522 |
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 | 24.4% | 44,985 |
| 2 | Brakes | 19.0% | 34,940 |
| 3 | Other defects | 6.4% | 11,753 |
| 4 | Suspension | 5.0% | 9,147 |
| 5 | Visibility | 3.7% | 6,845 |
| 6 | Emissions & environmental | 3.5% | 6,350 |
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 | 9,948 | 6.6% |
| 30-60k | 62,773 | 11.3% |
| 60-90k | 69,415 | 14.5% |
| 90-120k | 30,587 | 17.2% |
| 120-150k | 8,773 | 18.3% |
| 150k+ | 2,451 | 18.9% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 122,608 | 14.5% |
| Petrol | 61,359 | 12.0% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 37,053 | 12.1% |
| 2022 | 36,863 | 12.7% |
| 2023 | 36,813 | 13.7% |
| 2024 | 36,814 | 14.7% |
| 2025 | 36,427 | 15.2% |
What to check before buying a 2015 1 Series
On a 2015 1 Series, tyres is what the MOT record says goes wrong most — it appeared in 6.5% of tests. Check these areas before you commit.
- Tyres (6.5% 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 (6.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (3.2% 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 1 Seriess pass their MOT?
86.3% of the 183,970 2015 BMW 1 Series MOT tests in this dataset passed — a 13.7% fail rate.
What is the most common MOT failure on a 2015 BMW 1 Series?
Tyres, recorded in 6.5% of tests, followed by lighting & signalling (6.2%).
Does the 2015 1 Series get worse with mileage?
Its MOT fail rate rises from 6.6% in the 0-30k band to 18.9% in the 150k+ band.
Methodology & source. Based on 183,970 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.