2003 Bmw 3 Series — MOT failures & pass rate
Across 78,535 MOT tests analysed for the 2003 Bmw 3 Series, the most common recorded failure areas were brakes, suspension and lighting & signalling. Its pass rate of 75.7% was in line with the average for executive cars of a similar age (75.3%). Higher-mileage examples failed more often — 26.7% in the 150k+ group versus 12.5% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 12.5% | 9,815 |
| 2 | Suspension | 11.4% | 8,931 |
| 3 | Lighting & signalling | 10.2% | 7,986 |
| 4 | Tyres | 5.5% | 4,295 |
| 5 | Emissions & environmental | 5.1% | 3,965 |
| 6 | Visibility | 4.8% | 3,787 |
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 | 4,435 |
| 2 | Rbt (sp) | 4,271 |
| 3 | Rigid brake pipes | 3,941 |
| 4 | Pins and bushes | 3,168 |
| 5 | Ball joint | 2,812 |
| 6 | Catalyst emissions | 2,635 |
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 | 39.1% | 30,673 |
| 2 | Suspension | 30.6% | 24,037 |
| 3 | Tyres | 25.3% | 19,868 |
| 4 | Emissions & environmental | 24.9% | 19,588 |
| 5 | Lighting & signalling | 12.7% | 9,957 |
| 6 | Other defects | 11.6% | 9,071 |
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 | 682 | 12.5% |
| 30-60k | 4,654 | 16.9% |
| 60-90k | 13,961 | 21.5% |
| 90-120k | 22,442 | 24.5% |
| 120-150k | 19,732 | 26.2% |
| 150k+ | 16,986 | 26.7% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 62,395 | 23.7% |
| Diesel | 16,134 | 26.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 21,629 | 25.8% |
| 2022 | 18,083 | 25.0% |
| 2023 | 15,165 | 23.8% |
| 2024 | 12,708 | 23.3% |
| 2025 | 10,950 | 22.1% |
What to check before buying a 2003 3 Series
Before buying a 2003 Bmw 3 Series, focus on the areas it most often fails on. Brakes accounted for 12.5% of tests for this year.
- Brakes (12.5% 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 (11.4% 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 (10.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
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 3 Seriess pass their MOT?
75.7% of the 78,535 2003 Bmw 3 Series MOT tests in this dataset passed — a 24.3% fail rate.
What is the most common MOT failure on a 2003 Bmw 3 Series?
Brakes, recorded in 12.5% of tests, followed by suspension (11.4%).
Does the 2003 3 Series get worse with mileage?
Its MOT fail rate rises from 12.5% in the 0-30k band to 26.7% in the 150k+ band.
Methodology & source. Based on 78,535 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.