Proton Jumbuck
From 701 MOT tests. Below average for its class.
Common MOT failure categories
Pass rate by registration year
What goes wrong?
The most common MOT failure reasons are the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired and vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced. The top issue, the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, caused 92 failures in 2024. If you need repairs before retesting, sites like BookMyGarage let you compare local prices.
| the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired | 92 |
| the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired | 43 |
| vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced | 40 |
| lambda coefficient outside the default limits or the range specified by the manufacturer | 35 |
| brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle. | 32 |
| exhaust system leaking or insecure | 29 |
| a suspension pin, bush or joint excessively worn | 28 |
| brake pipe damaged or excessively corroded | 28 |
| body, cab or chassis excessively corroded at a mounting point | 26 |
| the aim of a headlamp is not within limits laid down in the requirements | 23 |
How serious are these failures?
Not all MOT failures are equal. 54.3% of Jumbuck failures could actually strand you: fractured springs, engine faults, exhaust problems. Another 23.4% are safety issues where the car still drives but shouldn't, such as worn brakes, corroded brake pipes, and steering wear. Breakdown cover may be worth considering for this model. When it does fail, the average repair bill is around £230.
Proton Jumbuck on UK roads
The fleet is shrinking: 75 scrapped or exported in the past year, a net loss of 75. At this rate, roughly 11.2 years until none remain. Now at 49% of its peak (1,740 in 2007 Q4).
Quarterly breakdown
| Quarter | On road | SORN | New | Gone | Net |
|---|---|---|---|---|---|
| 2025 Q3 | 386 | 467 | +0 | -18 | -18 |
| 2025 Q2 | 404 | 467 | +0 | -5 | -5 |
| 2025 Q1 | 415 | 461 | +0 | -20 | -20 |
| 2024 Q4 | 431 | 465 | +0 | -32 | -32 |
| 2024 Q3 | 464 | 464 | +0 | -11 | -11 |
| 2024 Q2 | 479 | 460 | +0 | -7 | -7 |
| 2024 Q1 | 478 | 468 | +0 | -12 | -12 |
| 2023 Q4 | 504 | 454 | +0 | -22 | -22 |
2 variants on the road
| Variant | Fuel | Licensed | Share |
|---|---|---|---|
| Jumbuck Gl | Gas | 233 | 60% |
| Jumbuck Gls | Diesel | 153 | 40% |
Source: DfT vehicle licensing statistics, 2025 Q3. Crown copyright, OGL v3.0.
By registration year
| Year | Pass rate | Top failures |
|---|---|---|
| 2006 | 59.9% | the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired |
| 2005 | 70.3% | the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, body, cab or chassis excessively corroded at a mounting point |
| 2004 | 67.6% | the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, a suspension pin, bush or joint excessively worn |
Typical mileage
Half of all Jumbucks tested had between 51,807 and 76,128 miles on the clock.
At 63,991 median miles, the Jumbuck has 0.055 failures per 10,000 miles driven.
Common questions
What is the Proton Jumbuck MOT pass rate?
The Proton Jumbuck has a 64.9% MOT pass rate based on 701 real MOT tests. This is below the national average.
What are common MOT failures on a Proton Jumbuck?
The most common MOT failure on the Proton Jumbuck is the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, which caused 92 failures. Other common issues include the strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired.
How many Proton Jumbucks are on UK roads?
There are 386 Proton Jumbucks currently licensed on UK roads, with 467 on SORN.
What is the typical mileage of a Proton Jumbuck at MOT?
The median mileage at MOT for a Proton Jumbuck is 63,991 miles. The middle 50% of vehicles tested have between 51,807 and 76,128 miles.
Buying a used Jumbuck?
Start with the free tools. Look up the specific vehicle's MOT history on GOV.UK The mileage at each test will show if it's been wound back, and the advisory history tells you what's wearing. Cross-reference that against the typical failures above to see if anything looks unusual for this model.
The free data won't tell you about outstanding finance, theft markers, or write-off history. For that, you need a vehicle history check This is especially important on a private sale where you have fewer legal protections.
With a 64.9% pass rate and an average repair bill of £230 when things go wrong, budget accordingly. 54.3% of failures on this model could actually strand you, so breakdown cover may be worth considering.
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MOT data from DVSA anonymised test results, 2024 test year. Fleet data from DfT vehicle licensing statistics. Crown copyright, OGL v3.0. MOT pass rates are statistical summaries of test outcomes, not assessments of individual vehicle safety or condition. Always inspect a vehicle and check its full MOT history before purchasing. See terms of use.