Pass rate, every year
70.8% Below average
1,823 tests across 4 model years, 2003–2006.
−10.2 pts vs the national average
Proton Jumbuck MOT Pass Rate & Official DVSA Failure Statistics
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Best year to buy
2005 74.6%
The strongest of the 4 years on record. See the 2005 page →
Worst year to buy
2004 68.7%
5.9 points below the 2005 peak. See the 2004 page →
The Proton Jumbuck MOT pass rate is 70.8%, −10.2 percentage points below the UK average. That is 1,823 DVSA MOT tests recorded between 2003 and 2006. This page lists the most common Proton Jumbuck MOT failures by category, names the best and worst model years, and finishes with a pre-MOT checklist you can run at home.
Proton Jumbuck MOT History and Failure Rates vs UK National Average
The Proton Jumbuck passed on its first attempt in 63.1%, and its overall record sits −10.2 percentage points below the national average for all cars. These figures come from every recorded DVSA MOT test for the Proton Jumbuck in the 2023–2025 data: 1,823 tests across 4 model years (2003–2006). A test still carries exactly one pass or fail verdict.
| Measure | This model |
|---|---|
| Tests analysed | 1,823 |
| Overall pass rate | 70.8% |
| Passed on first attempt | 63.1% |
| Average mileage at test | 72,912 mi |
| Model years covered | 2003–2006 (4 years) |
| Versus UK national average | −10.2 pts below |
Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.
Most Common Proton Jumbuck MOT Problems by Failure Category
Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Proton Jumbuck, the Lamps, reflectors and electrical equipment section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.
| Inspection section | Share of failures |
|---|---|
| Lamps, reflectors and electrical equipment | 22% |
| Noise, emissions and leaks | 17% |
| Suspension | 14% |
| Visibility | 11% |
| Body, chassis, structure | 10% |
| Seat belts and supplementary restraint systems | 10% |
| Brakes | 9% |
| Steering | 7% |
Shares are over the Proton Jumbuck's recorded defect strings, merged across its year pages.
Lamps, reflectors and electrical equipment
Around 22% of the recorded Proton Jumbuck failures fall in the Lamps, reflectors and electrical equipment section of the MOT inspection manual. Testers recorded "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (6.4%), "Battery(ies) insecure but not likely to fall from carrier" (3.1%), "Rear fog lamp not working" (0.8%) among the Proton Jumbuck's lamps, reflectors and electrical equipment faults.
Noise, emissions and leaks
Around 17% of the recorded Proton Jumbuck failures fall in the Noise, emissions and leaks section of the MOT inspection manual. Testers recorded "Catalyst emissions Lambda reading after 2nd fast idle outside specified limits" (5.6%), "Malfunction indicator lamp inoperative or indicates a malfunction" (1.5%), "Emissions not tested unable to be completed" (1.2%) among the Proton Jumbuck's noise, emissions and leaks faults.
Suspension
Around 14% of the recorded Proton Jumbuck failures fall in the Suspension section of the MOT inspection manual. Testers recorded "Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength" (6.6%) among the Proton Jumbuck's suspension faults.
Top Recorded Proton Jumbuck DVSA MOT Test Statistics & Defect Descriptions
The descriptions below are the exact DVSA failure strings testers recorded most often for the Proton Jumbuck, each with how many of the model's 1,823 tests it was noted on.
- "Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength" (Major) — noted on about 120 Proton Jumbuck tests, 6.6% of the model's MOT record.
- "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (Minor) — noted on about 116 Proton Jumbuck tests, 6.4% of the model's MOT record.
- "Catalyst emissions Lambda reading after 2nd fast idle outside specified limits" (Major) — noted on about 102 Proton Jumbuck tests, 5.6% of the model's MOT record.
- "Prescribed areas prescribed area strength or continuity significantly reduced" (Major) — noted on about 85 Proton Jumbuck tests, 4.7% of the model's MOT record.
- "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 85 Proton Jumbuck tests, 4.7% of the model's MOT record.
- "Service brake imbalance across an axle" (Major) — noted on about 82 Proton Jumbuck tests, 4.5% of the model's MOT record.
Best and Worst Proton Jumbuck Model Years by Pass Rate
The strongest Proton Jumbuck model year on record is 2005 (74.6% across 347 tests), and the weakest is 2004 (68.7%). The gap between them is 5.9 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.
Proton Jumbuck reliability is improving in the DVSA data — the pass rate moves about 0.8 points a year across the most recent model years shown above.
| Year | Tests | Pass rate |
|---|---|---|
| 2006 Jumbuck | 645 | 70.9% |
| 2005 Jumbuck | 347 | 74.6% |
| 2004 Jumbuck | 585 | 68.7% |
| 2003 Jumbuck | 246 | 70.3% |
Newest model year first. Only years with at least 50 recorded tests are listed.
Pre-MOT Inspection Checklist for Proton Jumbuck Owners
These checks follow this Proton Jumbuck's own most-recorded failure strings, starting with what a tester is most likely to flag on a Proton Jumbuck.
-
corrosion — “component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength”
Look under the sills, around the jacking points and where the suspension mounts meet the body. Flaking, holed or crumbly metal fails; a brown stain on sound metal does not.
-
the lights — “registration plate lamp(s) inoperative in the case of multiple lamps or light sources”
Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.
-
the exhaust and emissions — “catalyst emissions Lambda reading after 2nd fast idle outside specified limits”
Listen for a blow at idle and have someone rev it gently. Then look at the tailpipe smoke: blue is oil, white when warm is coolant, black is over-fuelling. Any of those and the emissions test is the least of it.
Derived from the DVSA failure strings testers recorded for the Proton Jumbuck. A check that finds nothing means the item is likely fine, not that the test is guaranteed.
Frequently Asked Questions: Proton Jumbuck MOT & Reliability
What is the Proton Jumbuck MOT pass rate?
70.8% of the 1,823 recorded Proton Jumbuck MOT tests ended in a pass, −10.2 percentage points below the national average. 63.1% of those passed on the first attempt.
Which Proton Jumbuck model years pass the MOT most often?
2005 is the strongest Proton Jumbuck year on record at 74.6%, while 2004 is the weakest at 68.7%. The year-by-year table below lists every model year with at least 50 recorded tests.
What are the most common Proton Jumbuck MOT failures?
The most recorded Proton Jumbuck failures are "Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength" and "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" — together around 13% of tests, mostly in the Suspension section.