2005 Mercedes-Benz Viano — MOT failures & pass rate
Across 2,556 MOT tests, the 2005 Mercedes-Benz Viano recorded a 74.2% pass rate. All cars of a similar age fail 27.6% of the time, so this is 1.9pp better than the group it competes with. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 16.2% of tests against 10.9% for the next-worst category.
At component level the recurring items are headlamp aim, headlamp and component mounting prescribed areas — headlamp aim alone was recorded 185 times.
Mileage matters less than usual here: the 2005 Viano fails 27.0% of the time in the 0-30k band and 25.2% at 150k+, a spread of only 1.8 points.
The petrol cars hold up better: 22.4% fail against 26.8% for diesel, a 4.3-point gap across 2,556 tests.
Brakes is the most common advisory, noted on 40.7% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 16.2% | 415 |
| 2 | Suspension | 10.9% | 280 |
| 3 | Brakes | 10.8% | 275 |
| 4 | Body, structure & corrosion | 6.8% | 174 |
| 5 | Visibility | 5.3% | 136 |
| 6 | Tyres | 4.8% | 122 |
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 | 185 |
| 2 | Headlamp | 169 |
| 3 | Component mounting prescribed areas | 155 |
| 4 | Rbt (sp) | 122 |
| 5 | Rigid brake pipes | 121 |
| 6 | Position lamp | 110 |
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 | 40.7% | 1,040 |
| 2 | Suspension | 25.9% | 661 |
| 3 | Tyres | 25.0% | 638 |
| 4 | Lighting & signalling | 20.5% | 524 |
| 5 | Body, structure & corrosion | 16.0% | 408 |
| 6 | Other defects | 11.2% | 286 |
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 | 126 | 27.0% |
| 30-60k | 219 | 17.8% |
| 60-90k | 354 | 22.6% |
| 90-120k | 327 | 26.9% |
| 120-150k | 386 | 30.0% |
| 150k+ | 1,008 | 25.2% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 1,981 | 26.8% |
| Petrol | 575 | 22.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 488 | 24.4% |
| 2022 | 596 | 25.5% |
| 2023 | 548 | 27.0% |
| 2024 | 488 | 26.6% |
| 2025 | 436 | 25.2% |
What to check before buying a 2005 Viano
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 16.2% of tests. Start there.
- Lighting & signalling (16.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (10.9% 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.
- 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 2005 Mercedes-Benz Vianos pass their MOT?
74.2% of the 2,556 2005 Mercedes-Benz Viano MOT tests in this dataset passed — a 25.8% fail rate.
What is the most common MOT failure on a 2005 Mercedes-Benz Viano?
Lighting & signalling, recorded in 16.2% of tests, followed by suspension (10.9%).
Does the 2005 Viano get worse with mileage?
Its MOT fail rate rises from 27.0% in the 0-30k band to 25.2% in the 150k+ band.
Methodology & source. Based on 2,556 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.