2004 BMW 7 Series — MOT failures & pass rate
The 2004 BMW 7 Series passed 79.5% of its 2,107 recorded MOT tests. Executive cars of a similar age fail 24.3% of the time, so this is 3.9pp better than the group it competes with. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (10.2%) and lighting & signalling (10.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are ball joint, pins and bushes and headlamp aim — ball joint alone was recorded 116 times.
Mileage matters less than usual here: the 2004 7 Series fails 20.6% of the time in the 0-30k band and 20.6% at 150k+, a spread of only 0.0 points.
Fuel type barely separates them — diesel fails 19.8% of the time against 21.0% for petrol.
Advisories point at the next bill rather than this one: brakes was flagged on 31.4% of tests without failing them.
The trend is improving — the fail rate fell from 21.9% in 2021 to 18.7% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 10.2% | 215 |
| 2 | Lighting & signalling | 10.0% | 210 |
| 3 | Brakes | 8.5% | 178 |
| 4 | Tyres | 6.3% | 132 |
| 5 | Seat belts & restraints | 5.2% | 109 |
| 6 | Visibility | 5.1% | 108 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Ball joint | 116 |
| 2 | Pins and bushes | 105 |
| 3 | Headlamp aim | 100 |
| 4 | SRS malfunction indicator lamp | 99 |
| 5 | Rigid brake pipes | 89 |
| 6 | Tread depth | 85 |
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 | 31.4% | 662 |
| 2 | Suspension | 29.5% | 622 |
| 3 | Tyres | 27.0% | 568 |
| 4 | Emissions & environmental | 22.1% | 466 |
| 5 | Lighting & signalling | 15.0% | 317 |
| 6 | Other defects | 11.3% | 239 |
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 | 34 | 20.6% |
| 30-60k | 112 | 12.5% |
| 60-90k | 303 | 20.8% |
| 90-120k | 423 | 21.8% |
| 120-150k | 548 | 20.4% |
| 150k+ | 684 | 20.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 1,123 | 21.0% |
| Diesel | 984 | 19.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 562 | 21.9% |
| 2022 | 509 | 20.2% |
| 2023 | 420 | 20.9% |
| 2024 | 338 | 19.2% |
| 2025 | 278 | 18.7% |
What to check before buying a 2004 7 Series
On a 2004 7 Series, suspension is what the MOT record says goes wrong most — it appeared in 10.2% of tests. Check these areas before you commit.
- Suspension (10.2% 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.
- Lighting & signalling (10.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.5% 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.
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 7 Seriess pass their MOT?
79.5% of the 2,107 2004 BMW 7 Series MOT tests in this dataset passed — a 20.5% fail rate.
What is the most common MOT failure on a 2004 BMW 7 Series?
Suspension, recorded in 10.2% of tests, followed by lighting & signalling (10.0%).
Does the 2004 7 Series get worse with mileage?
Its MOT fail rate rises from 20.6% in the 0-30k band to 20.6% in the 150k+ band.
Methodology & source. Based on 2,107 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.