MOT reliability
Triumph Twentyone
12 vehicles · 64 completed MOT tests analysed
92%
MOT pass rate
Based on 12 Triumph Twentyone vehicles and 64 completed MOT tests, the Triumph Twentyone has an overall 92% pass rate, with an average recorded mileage of 34,926 miles.
12
Vehicles
64
MOT tests
169
Avg miles / year
0.4
Faults per test
0%
Dangerous-fault share
Triumph Twentyone problem areas
Where faults occur most across all Triumph Twentyone MOT tests:
-
Other123%
-
Steering15%
-
Lamps & electrical4%
Triumph Twentyone pass rate by age
| Age (years) | Tests | Pass rate |
|---|---|---|
| 1 | 1 | 100% |
| 2 | 1 | 100% |
| 3 | 1 | 100% |
| 4 | 1 | 100% |
| 5 | 1 | 100% |
| 11 | 1 | 100% |
| 12 | 1 | 100% |
| 15 | 2 | 50% |
| 16 | 2 | 100% |
| 17 | 1 | 100% |
Fuel types: Petrol (12)
Most common Triumph Twentyone MOT faults
These are the faults and advisories recorded most often across Triumph Twentyone MOT tests:
- Steering headbearing has slight free play (2.2.2) (4 times)
- Steering movement slightly 'notchy' (2.2.1b) (4 times)
- Rear Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (3 times)
- Front wheel bearings are slightly rough (2.3.5b) (3 times)
- Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) (2 times)
- Rear wheel bearings have slight free play (2.4.A.2c) (2 times)
- Oil leak (2 times)
- Front wheel bearings have slight free play (2.3.5b) (2 times)
- Drive chain worn but not considered excessive (6.2.1e) (2 times)
- Locking device(s) not correctly fitted which may make the motor bicycle dangerous to ride (6.2.1h) (1 times)
- Stop lamp does not illuminate immediately a brake applies (1.3.1a) (1 times)
- Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) (1 times)
- slight notching in h/bearing (1 times)
- Steering movement slightly 'notchy' (2.2.1a) (1 times)
- oil leak (1 times)
Triumph Twentyone pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2012 | 1 | 6 | 100% | 24,183 |
| 1995 | 1 | 6 | 83% | 17,254 |
| 1990 | 1 | 1 | 100% | 42,156 |
| 1989 | 1 | 3 | 100% | 16,255 |
| 1979 | 1 | 11 | 100% | 74,339 |
| 1965 | 1 | 11 | 100% | 43,303 |
| 1960 | 1 | 7 | 86% | 5,797 |
| 1959 | 2 | 5 | 100% | 6,280 |
| 1958 | 3 | 14 | 79% | 61,092 |
Triumph Twentyone reliability FAQ
Across 12 Triumph Twentyone vehicles in our MOT data,
92% pass the MOT (a 8% failure rate), with about
0.4 faults or advisories recorded per test.
The most frequently recorded Triumph Twentyone MOT issues are:
Steering headbearing has slight free play (2.2.2); Steering movement slightly 'notchy' (2.2.1b); Rear Roller brake test indicates slight fluctuation of brake effort (3.3.A1d).
The typical Triumph Twentyone in our data has covered around
34,926 miles.
Compare the Triumph Twentyone
See how the Triumph Twentyone stacks up against other Triumph models on MOT reliability:
Check a specific Triumph Twentyone
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