Triumph Bonneville T100
Real ownership data from 19,916 UK Bonneville T100 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common Bonneville T100 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Steering and head bearings | fail | 27.9% |
| Fuel system | major | 6.3% |
| Fluid leaks | dangerous | 6% |
| Suspension | major | 5.1% |
| Controls and cables | dangerous | 4.2% |
| Lights and indicators | major | 3.8% |
| Fork seals | major | 3.5% |
| Other | major | 2.1% |
Advisories (wear noted but not failed) are excluded above; the most common is tyres.
Bonneville T100 mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| Year | Examples | Median mileage | Miles/year | First-time pass |
|---|---|---|---|---|
| 2026 | 148 | — | — | — |
| 2025 | 196 | — | — | — |
| 2024 | 222 | — | — | — |
| 2023 | 196 | 3,393 mi | — | 96.97% |
| 2022 | 175 | 4,004 mi | 820 | 93.29% |
| 2021 | 322 | 5,144 mi | 874 | 93.02% |
| 2020 | 521 | 5,848 mi | 846 | 92.65% |
| 2019 | 704 | 6,642 mi | 768 | 92.57% |
| 2018 | 1,027 | 7,738 mi | 792 | 91.56% |
| 2017 | 1,109 | 8,820 mi | 779 | 91.51% |
| 2016 | 1,663 | 8,410 mi | 666 | 90.4% |
| 2015 | 1,667 | 7,724 mi | 603 | 89.57% |
| 2014 | 1,453 | 8,374 mi | 614 | 89.8% |
| 2013 | 1,070 | 9,681 mi | 622 | 90.43% |
| 2012 | 1,142 | 9,493 mi | 572 | 90.62% |
| 2011 | 1,008 | 11,424 mi | 683 | 88.98% |
| 2010 | 1,164 | 11,176 mi | 665 | 89.94% |
| 2009 | 1,203 | 12,387 mi | 690 | 89.54% |
| 2008 | 909 | 11,198 mi | 592 | 88.41% |
| 2007 | 990 | 11,886 mi | 650 | 88.05% |
Bonneville T100 questions, answered with data
What are the most common problems with the Triumph Bonneville T100?
Across 19,916 UK examples, the most frequently recorded MOT faults are steering and head bearings (27.9% of all recorded faults), fuel system (6.3% of all recorded faults), fluid leaks (6% of all recorded faults).
What is average mileage for a Triumph Bonneville T100?
The median Triumph Bonneville T100 in the UK has covered 9,220 miles, and typically rides about 634 miles a year. Half of all examples fall between 4,942 and 15,900 miles.
Is the Triumph Bonneville T100 reliable?
89.75% of Triumph Bonneville T100 MOT tests are passed first time, with an average of 0 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 19,916 Triumph Bonneville T100 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.