2004 BMW M3 — MOT failures & pass rate
8,065 MOT tests on the 2004 BMW M3 are in this dataset, and 86.9% of them passed. Against executive cars of a similar age (24.3% fail rate), the 2004 M3 comes out 11.3pp better. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
No single area dominates — lighting & signalling (5.7%) and brakes (4.5%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, rigid brake pipes and washers — headlamp aim alone was recorded 294 times.
Condition tracks the odometer closely. Failures run at 3.9% in the 0-30k band and 18.5% in the 150k+ band, a 14.6-point spread — more than double.
Brakes is the most common advisory, noted on 22.8% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 15.6% in 2021 to 11.2% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 5.7% | 460 |
| 2 | Brakes | 4.5% | 366 |
| 3 | Suspension | 4.2% | 339 |
| 4 | Tyres | 2.7% | 221 |
| 5 | Visibility | 2.6% | 211 |
| 6 | Emissions & environmental | 2.0% | 162 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 294 |
| 2 | Rigid brake pipes | 200 |
| 3 | Washers | 147 |
| 4 | Catalyst emissions | 120 |
| 5 | Tread depth | 109 |
| 6 | Coil spring | 107 |
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 | 22.8% | 1,839 |
| 2 | Tyres | 14.4% | 1,162 |
| 3 | Suspension | 9.7% | 780 |
| 4 | Emissions & environmental | 7.4% | 595 |
| 5 | Lighting & signalling | 4.9% | 396 |
| 6 | Other defects | 4.5% | 359 |
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 | 182 | 3.9% |
| 30-60k | 930 | 7.8% |
| 60-90k | 2,434 | 12.4% |
| 90-120k | 2,855 | 14.0% |
| 120-150k | 1,317 | 15.8% |
| 150k+ | 341 | 18.5% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 1,823 | 15.6% |
| 2022 | 1,687 | 13.8% |
| 2023 | 1,593 | 12.3% |
| 2024 | 1,511 | 11.8% |
| 2025 | 1,451 | 11.2% |
What to check before buying a 2004 M3
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 5.7% of tests. Start there.
- 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 (4.5% 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.
- Suspension (4.2% 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 2004 BMW M3s pass their MOT?
86.9% of the 8,065 2004 BMW M3 MOT tests in this dataset passed — a 13.1% fail rate.
What is the most common MOT failure on a 2004 BMW M3?
Lighting & signalling, recorded in 5.7% of tests, followed by brakes (4.5%).
Does the 2004 M3 get worse with mileage?
Its MOT fail rate rises from 3.9% in the 0-30k band to 18.5% in the 150k+ band.
Methodology & source. Based on 8,065 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.