Proton Jumbuck (2005)
2005 Proton Jumbuck
CarHunch analysed 322 real MOT records for the 2005 Proton Jumbuck. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2005 Proton Jumbuck struggles with reliability, posting a first-time pass rate of just 71.2%—nearly 9 points below the UK average of 80%—and a concerning 32.9% of vehicles have experienced dangerous defects at some point. This is a red flag for potential buyers, suggesting structural or safety issues that go beyond typical wear and tear on an 18-year-old vehicle.
At a median mileage of 50,563 miles for their age, these trucks are actually lightly used, yet they're racking up an average of 5.08 failures and 21.5 advisories per test. The sheer volume of advisory items suggests widespread minor corrosion, wear, and component degradation that adds up to significant maintenance costs. Before purchase, budget for immediate remedial work and have a pre-buy inspection focus closely on brakes, suspension, and steering components.
What to check before buying a 2005 Proton Jumbuck
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- ⚠️ 32.9% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Proton Jumbuck
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 320 | 71.2% | 5.08 |
| LPG (0%) | 1 | 85.7% | 2 |
| Diesel (0%) | 1 | 64.7% | 6 |
Mileage Distribution
Most 2005 Proton Jumbuck vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2005 Proton Jumbuck vehicles fall between 37,396 and 66,276 miles.
2005 Proton Jumbuck — Still on the Road
Numbers are declining — 80 vehicles still getting MOTs in 2025 (30% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Most Common MOT Issues — 2005 Proton Jumbuck
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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71.5%
Oil leak, but not excessive
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50.9%
Nearside Front Tyre worn close to the legal limit
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50.8%
Oil leak
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48.5%
Offside Front Tyre worn close to the legal limit
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31.4%
Offside Steering rack gaiter split
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30.5%
Nearside Steering rack gaiter split
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29.8%
Offside Rear Brake pipe slightly corroded
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28.8%
Front Brake pad(s) wearing thin
Data covers a 3-year window centred on 2005. Counts include advisories and failures.
Found a specific Proton Jumbuck?
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