MOT reliability
Triumph Bonnville
15 vehicles · 106 completed MOT tests analysed
92%
MOT pass rate
Based on 15 Triumph Bonnville vehicles and 106 completed MOT tests, the Triumph Bonnville has an overall 92% pass rate, with an average recorded mileage of 35,258 miles.
15
Vehicles
106
MOT tests
285
Avg miles / year
0.3
Faults per test
0%
Dangerous-fault share
Triumph Bonnville problem areas
Where faults occur most across all Triumph Bonnville MOT tests:
-
Other103%
-
Steering18%
-
Seatbelts & equipment12%
-
Brakes6%
Triumph Bonnville pass rate by age
| Age (years) | Tests | Pass rate |
|---|---|---|
| 1 | 2 | 100% |
| 2 | 1 | 100% |
| 3 | 2 | 100% |
| 4 | 1 | 100% |
| 5 | 1 | 100% |
| 6 | 1 | 100% |
| 7 | 1 | 100% |
| 8 | 1 | 100% |
| 16 | 1 | 100% |
| 20 | 1 | 100% |
Fuel types: Petrol (15)
Most common Triumph Bonnville MOT faults
These are the faults and advisories recorded most often across Triumph Bonnville MOT tests:
- Exhaust noisy (7.1.2) (4 times)
- Centre Drive chain slightly loose (6.2.1d) (3 times)
- Drive chain slightly loose (6.2.1d) (3 times)
- Chain guard missing (3 times)
- Oil leak (2 times)
- Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) (2 times)
- Drive chain worn but not considered excessive (6.2.1e) (2 times)
- Front wheel bearings are slightly rough (2.3.5b) (2 times)
- Wheel alignment slightly misaligned. (2.5.1) (2 times)
- Front Steering headbearing has excessive free play (2.2.2) (1 times)
- Stop lamp does not illuminate immediately a brake applies (1.3.1a) (1 times)
- Front position lamp does not illuminate immediately when switched on (1.1.3a) (1 times)
- Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) (1 times)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (1 times)
- Nearside Rear Exhaust slightly deteriorated (7.1.1a) (1 times)
Triumph Bonnville pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2015 | 1 | 5 | 80% | 19,157 |
| 2014 | 1 | 1 | 100% | 1,362 |
| 2010 | 1 | 8 | 100% | 1,890 |
| 1990 | 1 | 7 | 100% | 33,275 |
| 1980 | 1 | 10 | 90% | 305,503 |
| 1978 | 2 | 8 | 88% | 9,834 |
| 1977 | 1 | 7 | 100% | 41,804 |
| 1976 | 3 | 28 | 89% | 12,847 |
| 1973 | 1 | 8 | 100% | 54,824 |
| 1972 | 2 | 11 | 91% | 3,971 |
| 1970 | 1 | 13 | 92% | 4,914 |
Triumph Bonnville reliability FAQ
Across 15 Triumph Bonnville vehicles in our MOT data,
92% pass the MOT (a 8% failure rate), with about
0.3 faults or advisories recorded per test.
The most frequently recorded Triumph Bonnville MOT issues are:
Exhaust noisy (7.1.2); Centre Drive chain slightly loose (6.2.1d); Drive chain slightly loose (6.2.1d).
The typical Triumph Bonnville in our data has covered around
35,258 miles.
Compare the Triumph Bonnville
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