At a Glance
The Proton Jumbuck has 27 identified common problems across 1 generation, with the Jumbuck (2002-2009) being the most affected generation and brakes the most common problem category. Based on 22K MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on a specific model than the UK average — confirmed at 99% statistical confidence. Read our DVSA MOT data methodology →
Below: generation-by-generation comparison of Proton Jumbuck common problems, MOT failure types, and pass-rate data drawn from DVSA records. Click any generation to see fuel- and engine-specific fault patterns, mileage-banded repair guidance, and the most common MOT failures testers record.
MOT Tests & Failures by Generation
Proton Jumbuck generations by MOT tests, failures, and identified problems from DVSA data
Hover over each bar for a full breakdown. Tap any bar to view that generation's problems.
Showing total MOT tests, failures, and known problems per make. Hover over each bar for a full breakdown.
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Browse Proton Jumbuck Generations
Select a generation to see its specific problems, MOT failures and advisories
Most Common Proton Jumbuck MOT Failures
Every reason Proton Jumbuck vehicles fail their MOT, ranked by frequency. Select an individual year to see only that year’s failures, or stay on ‘All time’ for the combined picture across our 20 years of DVSA data. Scroll inside the table for the full list.
| # | Failure | % of failures |
|---|---|---|
| 1 | Brake hydraulic component worn | 12.08% |
| 2 | Exhaust system fault | 10.45% |
| 3 | Tyre tread depth below limit | 9.36% |
| 4 | Stop lamp not working | 7.49% |
| 5 | Rigid brake pipe corroded or damaged | 4.07% |
| 6 | Windscreen washer not working | 3.99% |
| 7 | Track rod end worn | 3.91% |
| 8 | Suspension joint or bush worn | 3.31% |
| 9 | Position lamp not working | 2.97% |
| 10 | Driveshaft fault | 2.79% |
| 11 | Shock absorber worn or leaking | 2.67% |
| 12 | Suspension mounting corroded | 2.63% |
| 13 | Brake pads or linings worn | 2.53% |
| 14 | Indicator fault | 2.12% |
| 15 | Headlamp aim defect | 2.05% |
| 16 | Windscreen damage affecting view | 1.92% |
| 17 | Body corrosion or damage | 1.74% |
| 18 | Parking brake performance below minimum | 1.58% |
| 19 | Tyre condition | 1.53% |
| 20 | Rear lamp not working | 1.31% |
| 21 | Number plate lamp not working | 1.20% |
| 22 | Mirror damaged or missing | 1.12% |
| 23 | Suspension arm worn or corroded | 1.07% |
| 24 | Chassis condition | 1.05% |
| 25 | Headlamp fault | 0.86% |
| 26 | Wiper blades deteriorated | 0.73% |
| 27 | Brake performance below minimum | 0.68% |
| 28 | Tyre size or type not matched | 0.64% |
| 29 | Brake disc or drum worn | 0.63% |
| 30 | Ball joint dust cover split | 0.48% |
| 31 | Flexible brake hose damaged | 0.47% |
| 32 | Subframe mounting corroded | 0.46% |
| 33 | Bonnet catch or hinge fault | 0.44% |
| 34 | Suspension linkage fault | 0.44% |
| 35 | Steering rack fault | 0.38% |
| 36 | Engine oil leak | 0.34% |
| 37 | Compression ignition emissions above threshold | 0.33% |
| 38 | Load sensing valve fault | 0.33% |
| 39 | Electrical switch fault | 0.32% |
| 40 | Power steering pipe or hose leaking | 0.32% |
| 41 | Fuel pipe corroded or damaged | 0.28% |
| 42 | Leaf spring broken or corroded | 0.28% |
| 43 | Fuel tank corroded or leaking | 0.27% |
| 44 | Catalytic converter efficiency low | 0.26% |
| 45 | Handbrake lever fault | 0.24% |
| 46 | Vehicle floor corroded | 0.23% |
| 47 | Spark ignition emissions above threshold | 0.22% |
| 48 | Brake wheel cylinder fault | 0.19% |
| 49 | Seat belt condition | 0.19% |
| 50 | MacPherson strut worn | 0.19% |
| 51 | Brake fluid level low or contaminated | 0.18% |
| 52 | Brake fluid warning light on | 0.18% |
| 53 | Front passenger door fault | 0.18% |
| 54 | Rear reflector damaged or missing | 0.18% |
| 55 | Vehicle structure corrosion | 0.18% |
| 56 | Anti-roll bar worn or corroded | 0.17% |
| 57 | Brake pedal movement restricted | 0.17% |
| 58 | Body security fault | 0.13% |
| 59 | Driver seat fault | 0.12% |
| 60 | Electrical wiring fault | 0.12% |
| 61 | Horn not working | 0.12% |
| 62 | Speedometer fault | 0.12% |
| 63 | Fog lamp not working | 0.11% |
| 64 | Front suspension joint worn | 0.11% |
| 65 | Headlamp levelling device fault | 0.11% |
| 66 | Steering lock fault | 0.11% |
| 67 | Fuel hose damaged or leaking | 0.10% |
| 68 | Hydraulic brake cylinder fault | 0.10% |
| 69 | Rear fog lamp warning light fault | 0.10% |
| 70 | Anchor bracket corroded | 0.09% |
| 71 | Brake valve fault | 0.09% |
| 72 | Driver door fault | 0.09% |
| 73 | Bumper damaged or insecure | 0.08% |
| 74 | Front lamp not working | 0.08% |
| 75 | Securing bolts missing or insecure | 0.08% |
| 76 | Steering operation fault | 0.08% |
| 77 | Steering wheel damaged or insecure | 0.08% |
| 78 | Tyre valve stem damaged | 0.08% |
| 79 | Wheel bearing worn | 0.08% |
| 80 | Battery loose or leaking | 0.07% |
| 81 | Coil spring broken or corroded | 0.07% |
| 82 | Exhaust emissions above threshold (non-catalyst) | 0.07% |
| 83 | Engine mounting worn or broken | 0.06% |
| 84 | Rear fog lamp not working | 0.05% |
| 85 | Spare wheel fault | 0.05% |
| 86 | Steering free play excessive | 0.05% |
| 87 | Towbar fault | 0.05% |
| 88 | Brake air or vacuum system fault | 0.04% |
| 89 | Suspension unit fault | 0.04% |
| 90 | Tie bar or rod worn or corroded | 0.04% |
| 91 | Brake fluid reservoir fault | 0.03% |
| 92 | Driver airbag fault | 0.03% |
| 93 | Fuel cap damaged or missing | 0.03% |
| 94 | Hydraulic fluid leak | 0.03% |
| 95 | Leaf spring eye worn or broken | 0.03% |
| 96 | Leaf spring shackle bracket corroded | 0.03% |
| 97 | Parking brake condition | 0.03% |
| 98 | Power steering pump fault | 0.03% |
| 99 | Rear suspension fault | 0.03% |
| 100 | Spring mounting corroded | 0.03% |
| 101 | Suspension linkage attachment bracket or mounting corroded | 0.03% |
| 102 | Tailgate damaged or insecure | 0.03% |
| 103 | Brake cable, rod, lever or linkage fault | 0.02% |
| 104 | Brake caliper fault | 0.02% |
| 105 | Brake master cylinder fault | 0.02% |
| 106 | Brake pedal fault | 0.02% |
| 107 | Passenger seat fault | 0.02% |
| 108 | Steering column fault | 0.02% |
| 109 | Steering drive system fault | 0.02% |
| 110 | Subframe corrosion or damage | 0.02% |
| 111 | Transmission oil leak | 0.02% |
| 112 | Bonded suspension condition | 0.02% |
| 113 | Access panel damaged or insecure | 0.01% |
| 114 | Airbag warning light on | 0.01% |
| 115 | Axle corroded or damaged | 0.01% |
| 116 | Body strengthening plate corroded | 0.01% |
| 117 | Brake back plate corroded or damaged | 0.01% |
| 118 | Brake fluid leak | 0.01% |
| 119 | Brake servo fault | 0.01% |
| 120 | Dashboard warning lamp fault | 0.01% |
| 121 | Exhaust leak | 0.01% |
| 122 | Front suspension fault | 0.01% |
| 123 | Handbrake mechanism or mounting fault | 0.01% |
| 124 | Hinged tailboard damaged or insecure | 0.01% |
| 125 | Indicator warning light fault | 0.01% |
| 126 | Main beam warning light fault | 0.01% |
| 127 | Outline marker lamp not working | 0.01% |
| 128 | Power steering ram fault | 0.01% |
| 129 | Seat belt or padding damaged | 0.01% |
| 130 | Steering arm worn | 0.01% |
| 131 | Steering lock stop fault | 0.01% |
| 132 | Step damaged or insecure | 0.01% |
| 133 | Window damaged or won't operate | 0.01% |
Showing all 133 reasons — scroll inside the table for the full list.
Proton Jumbuck MOT Failures by Category
Total MOT failure occurrences for the Proton Jumbuck, grouped by category. Same data as the failures table above — just sliced by category instead of fault title. Hover a slice for the top failures in each category.
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Frequently Asked Questions
What are the most common Proton Jumbuck problems?
Based on analysis of 22K Proton Jumbuck MOT tests from DVSA data, we have 27 identified common problems across 1 generation. The most frequently flagged issue is "Steering rack fault". Brakes is the most common problem category.
Which Proton Jumbuck generation has the most problems?
The Proton Jumbuck Jumbuck (2002-2009) (2002–2009) has the highest number of identified common problems (37). Click the generation card above for the full breakdown.
How is this data calculated?
We analyse anonymised DVSA MOT test records under the Open Government Licence. An issue is classified as a "Common Problem" when it occurs significantly more often on a specific model than the UK average, confirmed at 99% statistical confidence. Read the full methodology page for details.
Can I report a problem with my Proton Jumbuck?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Proton Jumbuck owners spot problems early. All submissions are reviewed before being added to the public database.
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