2012 BMW 1 Series — MOT failures & pass rate
The 2012 BMW 1 Series passed 80.3% of its 181,168 recorded MOT tests. Against small family cars of a similar age (21.2% fail rate), the 2012 1 Series comes out 1.5pp better. Failures cluster in lighting & signalling, suspension and tyres.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 11.7% of tests against 6.9% for the next-worst category.
At component level the recurring items are position lamp, headlamp aim and tread depth — position lamp alone was recorded 9,531 times.
A 150k+ example is materially riskier than a 0-30k one: 23.5% versus 9.5%.
The petrol cars hold up better: 17.3% fail against 20.7% for diesel, a 3.4-point gap across 181,165 tests.
Tyres is the most common advisory, noted on 26.9% of tests — work that passed today but is likely due soon.
The trend is worsening — 17.4% of tests failed in 2021 against 21.7% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.7% | 21,199 |
| 2 | Suspension | 6.9% | 12,450 |
| 3 | Tyres | 6.8% | 12,342 |
| 4 | Brakes | 4.7% | 8,466 |
| 5 | Visibility | 3.8% | 6,955 |
| 6 | Emissions & environmental | 1.7% | 3,144 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Position lamp | 9,531 |
| 2 | Headlamp aim | 8,204 |
| 3 | Tread depth | 8,065 |
| 4 | Shock absorbers | 6,373 |
| 5 | Washers | 5,230 |
| 6 | Side repeaters | 4,462 |
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 | 26.9% | 48,635 |
| 2 | Brakes | 21.3% | 38,601 |
| 3 | Other defects | 14.8% | 26,892 |
| 4 | Suspension | 14.3% | 25,960 |
| 5 | Lighting & signalling | 6.4% | 11,652 |
| 6 | Emissions & environmental | 5.0% | 9,047 |
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 | 3,006 | 9.5% |
| 30-60k | 26,586 | 14.5% |
| 60-90k | 60,613 | 18.7% |
| 90-120k | 54,255 | 21.6% |
| 120-150k | 25,752 | 23.2% |
| 150k+ | 10,910 | 23.5% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 127,114 | 20.7% |
| Petrol | 54,051 | 17.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 37,235 | 17.4% |
| 2022 | 37,020 | 18.6% |
| 2023 | 36,877 | 20.2% |
| 2024 | 35,729 | 20.9% |
| 2025 | 34,307 | 21.7% |
What to check before buying a 2012 1 Series
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 11.7% of tests. Start there.
- Lighting & signalling (11.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (6.9% 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.
- Tyres (6.8% 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.
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 2012 BMW 1 Seriess pass their MOT?
80.3% of the 181,168 2012 BMW 1 Series MOT tests in this dataset passed — a 19.7% fail rate.
What is the most common MOT failure on a 2012 BMW 1 Series?
Lighting & signalling, recorded in 11.7% of tests, followed by suspension (6.9%).
Does the 2012 1 Series get worse with mileage?
Its MOT fail rate rises from 9.5% in the 0-30k band to 23.5% in the 150k+ band.
Methodology & source. Based on 181,168 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.