2003 Mercedes-Benz Motorhome — MOT failures & pass rate
260 MOT tests on the 2003 Mercedes-Benz Motorhome are in this dataset, and 78.5% of them passed. Against all cars of a similar age (27.6% fail rate), the 2003 Motorhome comes out 6.1pp better. Failures cluster in lighting & signalling, brakes and suspension.
What the MOT record shows
Lighting & signalling dominates the failure mix at 16.5% of all tests — 7.7 points clear of brakes, so it is the first thing to check.
At component level the recurring items are headlamp aim, rigid brake pipes and position lamp — headlamp aim alone was recorded 17 times.
Advisories point at the next bill rather than this one: brakes was flagged on 24.2% of tests without failing them.
The trend is improving — the fail rate fell from 21.1% in 2021 to 19.2% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 16.5% | 43 |
| 2 | Brakes | 8.8% | 23 |
| 3 | Suspension | 4.2% | 11 |
| 4 | Visibility | 3.1% | 8 |
| 5 | Body, structure & corrosion | 2.7% | 7 |
| 6 | Steering | 2.7% | 7 |
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 | 17 |
| 2 | Rigid brake pipes | 13 |
| 3 | Position lamp | 12 |
| 4 | Stop lamp | 10 |
| 5 | Wipers | 7 |
| 6 | Rear fog lamp | 7 |
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 | 24.2% | 63 |
| 2 | Suspension | 20.4% | 53 |
| 3 | Lighting & signalling | 13.1% | 34 |
| 4 | Other defects | 6.9% | 18 |
| 5 | Body, structure & corrosion | 6.2% | 16 |
| 6 | Tyres | 5.8% | 15 |
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 | 102 | 21.6% |
| 60-90k | 93 | 19.4% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 52 | 21.1% |
| 2022 | 55 | 20.0% |
| 2023 | 53 | 26.4% |
| 2024 | 48 | 20.8% |
| 2025 | 52 | 19.2% |
What to check before buying a 2003 Motorhome
On a 2003 Motorhome, lighting & signalling is what the MOT record says goes wrong most — it appeared in 16.5% of tests. Check these areas before you commit.
- Lighting & signalling (16.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.8% 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.
- Suspension (4.2% 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.
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 Motorhomes pass their MOT?
78.5% of the 260 2003 Mercedes-Benz Motorhome MOT tests in this dataset passed — a 21.5% fail rate.
What is the most common MOT failure on a 2003 Mercedes-Benz Motorhome?
Lighting & signalling, recorded in 16.5% of tests, followed by brakes (8.8%).
Does the 2003 Motorhome get worse with mileage?
Its MOT fail rate rises from 21.6% in the 30-60k band to 19.4% in the 60-90k band.
Methodology & source. Based on 260 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.