2005 Proton Jumbuck — MOT failures & pass rate
Across 735 MOT tests, the 2005 Proton Jumbuck recorded a 72.0% pass rate. That is effectively the same as all cars of a similar age (27.6% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and emissions & environmental.
What the MOT record shows
No single area dominates — lighting & signalling (14.4%) and suspension (13.6%) 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, catalyst emissions and prescribed areas — component mounting prescribed areas alone was recorded 100 times.
Condition tracks the odometer closely. Failures run at 19.5% in the 0-30k band and 28.1% in the 120-150k band, a 8.6-point spread.
Brakes is the most common advisory, noted on 28.0% 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 | 14.4% | 106 |
| 2 | Suspension | 13.6% | 100 |
| 3 | Emissions & environmental | 10.9% | 80 |
| 4 | Brakes | 9.7% | 71 |
| 5 | Body, structure & corrosion | 7.9% | 58 |
| 6 | Visibility | 6.3% | 46 |
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 | 100 |
| 2 | Catalyst emissions | 83 |
| 3 | Prescribed areas | 61 |
| 4 | Wipers | 39 |
| 5 | Rigid brake pipes | 35 |
| 6 | Service brake imbalance | 34 |
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 | 28.0% | 206 |
| 2 | Suspension | 26.7% | 196 |
| 3 | Emissions & environmental | 22.9% | 168 |
| 4 | Tyres | 18.4% | 135 |
| 5 | Body, structure & corrosion | 18.4% | 135 |
| 6 | Lighting & signalling | 13.6% | 100 |
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 | 41 | 19.5% |
| 30-60k | 221 | 23.5% |
| 60-90k | 297 | 30.6% |
| 90-120k | 130 | 30.8% |
| 120-150k | 32 | 28.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 199 | 27.1% |
| 2022 | 180 | 32.8% |
| 2023 | 140 | 25.0% |
| 2024 | 111 | 25.2% |
| 2025 | 105 | 28.6% |
What to check before buying a 2005 Jumbuck
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 14.4% of tests. Start there.
- Lighting & signalling (14.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (13.6% 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.
- Emissions & environmental (10.9% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 Proton Jumbucks pass their MOT?
72.0% of the 735 2005 Proton Jumbuck MOT tests in this dataset passed — a 28.0% fail rate.
What is the most common MOT failure on a 2005 Proton Jumbuck?
Lighting & signalling, recorded in 14.4% of tests, followed by suspension (13.6%).
Does the 2005 Jumbuck get worse with mileage?
Its MOT fail rate rises from 19.5% in the 0-30k band to 28.1% in the 120-150k band.
Methodology & source. Based on 735 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.