MOT reliability
Triumph Bonnie
11 vehicles · 106 completed MOT tests analysed
85%
MOT pass rate
Based on 11 Triumph Bonnie vehicles and 106 completed MOT tests, the Triumph Bonnie has an overall 85% pass rate, with an average recorded mileage of 14,811 miles.
11
Vehicles
106
MOT tests
341
Avg miles / year
0.4
Faults per test
0%
Dangerous-fault share
Triumph Bonnie problem areas
Where faults occur most across all Triumph Bonnie MOT tests:
-
Other82%
-
Brakes25%
-
Tyres, wheels & suspension10%
-
Steering5%
-
Lamps & electrical5%
-
Identification & plates2%
-
Seatbelts & equipment2%
Triumph Bonnie pass rate by age
| Age (years) | Tests | Pass rate |
|---|---|---|
| 3 | 2 | 100% |
| 4 | 2 | 50% |
| 5 | 2 | 100% |
| 6 | 3 | 67% |
| 7 | 2 | 100% |
| 8 | 2 | 100% |
| 9 | 2 | 100% |
| 10 | 3 | 67% |
| 11 | 1 | 100% |
| 12 | 3 | 67% |
| 13 | 2 | 100% |
| 14 | 3 | 67% |
| 15 | 1 | 100% |
| 16 | 2 | 100% |
| 17 | 2 | 100% |
| 18 | 1 | 100% |
| 19 | 2 | 100% |
| 20 | 2 | 100% |
Fuel types: Petrol (11)
Most common Triumph Bonnie MOT faults
These are the faults and advisories recorded most often across Triumph Bonnie MOT tests:
- Rear Brake pad(s) close to minimum limit (1.1.13 (a)) (4 times)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (3 times)
- Front Headlamp aim too high (1.6) (2 times)
- Rear wheel bearings have slight free play (2.4.A.2c) (2 times)
- Horn not working (1.7.3a) (2 times)
- Front Brake disc(s) has slight run out (3.2.A1m) (2 times)
- head lamp main/dip witch is on headlamp (2 times)
- Drive chain worn but not considered excessive (6.2.1e) (2 times)
- Front Tyre worn close to the legal limit (5.2.3 (e)) (2 times)
- Rear Tyre worn close to the legal limit (5.2.3 (e)) (2 times)
- Rear Rear suspension bush has slight free play (2.4.A2a(i)) (1 times)
- Front Throttle operating incorrectly (6.2.1f) (1 times)
- Rear Drive chain excessively loose (6.2.1d) (1 times)
- Front Headlamp aim too low (1.6) (1 times)
- Front Front shock absorber seal failed and leaking oil (2.3.3) (1 times)
Triumph Bonnie pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2009 | 1 | 15 | 80% | 28,134 |
| 2005 | 1 | 13 | 85% | 8,247 |
| 1995 | 1 | 22 | 86% | 19,902 |
| 1980 | 1 | 12 | 83% | 22,167 |
| 1974 | 1 | 5 | 80% | 20,310 |
| 1973 | 3 | 18 | 94% | 18,553 |
| 1969 | 2 | 20 | 80% | 3,493 |
| 1960 | 1 | 1 | 100% | 1,525 |
Triumph Bonnie reliability FAQ
Across 11 Triumph Bonnie vehicles in our MOT data,
85% pass the MOT (a 15% failure rate), with about
0.4 faults or advisories recorded per test.
The most frequently recorded Triumph Bonnie MOT issues are:
Rear Brake pad(s) close to minimum limit (1.1.13 (a)); Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d); Front Headlamp aim too high (1.6).
The typical Triumph Bonnie in our data has covered around
14,811 miles.
Compare the Triumph Bonnie
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