Triumph 1500 vs Triumph Bonnieville t140: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph 1500
74%
MOT pass rate · 37,142 vehicles
Triumph Bonnieville t140
67%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph Bonnieville t140 (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph Bonnieville t140 |
|---|---|---|
| MOT pass rate | 74% ✓ | 67% |
| MOT failure rate | 26% ✓ | 33% |
| Faults & advisories per test | 2.3 | 0.8 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | — |
| Sample size (vehicles) | 37,142 | 1 |
Most common faults
Triumph 1500
- Parking brake: efficiency below requirements (3.7.B.7)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Rear wheel bearing has slight play (2.6.2)
- Offside Rear wheel bearing has slight play (2.6.2)
- Brakes imbalanced across an axle (3.7.B.5b)
- Oil leak
Triumph Bonnieville t140
- Centre Rear Tyre worn close to the legal limit (4.1.3(ii))
- Nearside Front Handlebar handgrip not secure to handlebars. (2.1.1c)
- Offside Front Handlebar handgrip not secure to handlebars. (2.1.1c)
- Offside Front Throttle operating incorrectly (6.2.1f)
- Rear wheel bearings have excessive free play (2.4.A.2c)
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph Bonnieville t140 (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph Bonnieville t140 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.