Triumph Bonneville (2004)
2004 Triumph Bonneville
CarHunch analysed 931 real MOT records for the 2004 Triumph Bonneville.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2004 Triumph Bonneville passes its MOT first time in 86.5% of cases, a solid 6.5 percentage points above the UK average, suggesting these bikes are generally well-maintained by their owners. However, 16.5% have recorded a dangerous defect at some point, which is worth noting if you're buying used — you'll want a pre-purchase inspection to catch any lurking safety issues.
Most Bonnevilles in this sample show relatively low mileage for their age at around 9,600 miles median, indicating these are likely cherished bikes that don't see daily commuting use. The average vehicle racks up 1.63 failures and 4.9 advisories per test, suggesting wear items like brakes and exhausts are the typical culprits rather than structural problems — so budget for regular maintenance but don't expect major mechanical surprises if the service history is sound.
The 2004 Triumph Bonneville passes its MOT first time at roughly the UK average rate (88.9%) — solid but worth checking this vehicle's history carefully.
These stats describe 931 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
What tends to go wrong
Across 931 vehicles — figures show how many had each issue flagged at least once in their MOT history.
Data covers a 3-year window centred on 2004.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 931 Triumph Bonneville cars.
Before you buy a 2004 Triumph Bonneville
Based on MOT data from 931 vehicles — here's what to check.
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Check the full MOT history.
16.5% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 924 | 88.8% | 1.65 |
Colour Breakdown
Based on 30,017 Triumph Bonneville vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2004 Triumph Bonneville vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2004 Triumph Bonneville vehicles fall between 5,801 and 14,736 miles.
2004 Triumph Bonneville — Still on the Road
Most 2004 Triumph Bonnevilles are still being driven.
443 vehicles still getting MOTs in 2025 — 72% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.
MOT History Averages
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Compare with another model
See how the 2004 Triumph Bonneville stacks up against a rival.