2003 Mercedes-Benz V-Class — MOT failures & pass rate
Across 525 MOT tests, the 2003 Mercedes-Benz V-Class recorded a 68.8% pass rate. That is 1.3 percentage points worse than MPVs of a similar age, which fail at 30.0%. Failures cluster in lighting & signalling, brakes and body, structure & corrosion.
What the MOT record shows
No single area dominates — lighting & signalling (16.6%) and brakes (14.7%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are component mounting prescribed areas, joints and rbt (sp) — component mounting prescribed areas alone was recorded 44 times.
A 150k+ example is materially riskier than a 30-60k one: 35.3% versus 27.3%.
Brakes is the most common advisory, noted on 42.5% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 31.3% in 2021 to 26.9% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 16.6% | 87 |
| 2 | Brakes | 14.7% | 77 |
| 3 | Body, structure & corrosion | 14.3% | 75 |
| 4 | Suspension | 12.8% | 67 |
| 5 | Visibility | 6.1% | 32 |
| 6 | Tyres | 5.3% | 28 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 44 |
| 2 | Joints | 39 |
| 3 | Rbt (sp) | 37 |
| 4 | Headlamp | 32 |
| 5 | Headlamp aim | 32 |
| 6 | Service brake performance | 28 |
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 | 42.5% | 223 |
| 2 | Tyres | 26.9% | 141 |
| 3 | Body, structure & corrosion | 26.5% | 139 |
| 4 | Suspension | 25.1% | 132 |
| 5 | Other defects | 19.1% | 100 |
| 6 | Lighting & signalling | 13.9% | 73 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 44 | 27.3% |
| 60-90k | 84 | 29.8% |
| 90-120k | 151 | 29.8% |
| 120-150k | 111 | 33.3% |
| 150k+ | 116 | 35.3% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 466 | 31.6% |
| Petrol | 59 | 28.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 131 | 31.3% |
| 2022 | 116 | 28.4% |
| 2023 | 116 | 35.3% |
| 2024 | 95 | 32.6% |
| 2025 | 67 | 26.9% |
What to check before buying a 2003 V-Class
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 16.6% of tests. Start there.
- Lighting & signalling (16.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (14.7% 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.
- Body, structure & corrosion (14.3% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
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 Mercedes-Benz V-Classs pass their MOT?
68.8% of the 525 2003 Mercedes-Benz V-Class MOT tests in this dataset passed — a 31.2% fail rate.
What is the most common MOT failure on a 2003 Mercedes-Benz V-Class?
Lighting & signalling, recorded in 16.6% of tests, followed by brakes (14.7%).
Does the 2003 V-Class get worse with mileage?
Its MOT fail rate rises from 27.3% in the 30-60k band to 35.3% in the 150k+ band.
Methodology & source. Based on 525 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.