2003 BMW 5 Series — MOT failures & pass rate
18,237 MOT tests on the 2003 BMW 5 Series are in this dataset, and 75.7% of them passed. That is effectively the same as executive cars of a similar age (24.4% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in suspension, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — suspension (12.1%) and lighting & signalling (11.4%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, rbt (sp) and pins and bushes — headlamp aim alone was recorded 1,253 times.
Mileage matters less than usual here: the 2003 5 Series fails 28.1% of the time in the 0-30k band and 25.0% at 150k+, a spread of only 3.2 points.
Fuel type barely separates them — petrol fails 24.0% of the time against 24.7% for diesel.
Brakes is the most common advisory, noted on 34.6% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 25.2% in 2021 to 23.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 12.1% | 2,203 |
| 2 | Lighting & signalling | 11.4% | 2,077 |
| 3 | Brakes | 10.8% | 1,978 |
| 4 | Tyres | 5.7% | 1,034 |
| 5 | Visibility | 5.4% | 981 |
| 6 | Seat belts & restraints | 3.9% | 706 |
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 | 1,253 |
| 2 | Rbt (sp) | 918 |
| 3 | Pins and bushes | 898 |
| 4 | Rigid brake pipes | 862 |
| 5 | Tread depth | 825 |
| 6 | Washers | 768 |
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 | 34.6% | 6,305 |
| 2 | Suspension | 30.5% | 5,564 |
| 3 | Tyres | 25.4% | 4,624 |
| 4 | Emissions & environmental | 23.0% | 4,189 |
| 5 | Other defects | 15.3% | 2,793 |
| 6 | Lighting & signalling | 14.5% | 2,642 |
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 | 231 | 28.1% |
| 30-60k | 532 | 15.0% |
| 60-90k | 1,949 | 20.9% |
| 90-120k | 3,857 | 23.8% |
| 120-150k | 4,618 | 25.4% |
| 150k+ | 6,747 | 25.0% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 10,104 | 24.0% |
| Diesel | 8,122 | 24.7% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,884 | 25.2% |
| 2022 | 4,229 | 23.9% |
| 2023 | 3,545 | 23.5% |
| 2024 | 3,033 | 25.1% |
| 2025 | 2,546 | 23.3% |
What to check before buying a 2003 5 Series
The failure pattern for this year is specific enough to inspect against: suspension accounted for 12.1% of tests. Start there.
- Suspension (12.1% 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 (11.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (10.8% 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 2003 BMW 5 Seriess pass their MOT?
75.7% of the 18,237 2003 BMW 5 Series MOT tests in this dataset passed — a 24.3% fail rate.
What is the most common MOT failure on a 2003 BMW 5 Series?
Suspension, recorded in 12.1% of tests, followed by lighting & signalling (11.4%).
Does the 2003 5 Series get worse with mileage?
Its MOT fail rate rises from 28.1% in the 0-30k band to 25.0% in the 150k+ band.
Methodology & source. Based on 18,237 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.