MOT reliability
Triumph T21
114 vehicles · 575 completed MOT tests analysed
93%
MOT pass rate
Based on 114 Triumph T21 vehicles and 575 completed MOT tests, the Triumph T21 has an overall 93% pass rate, with an average recorded mileage of 22,953 miles.
114
Vehicles
575
MOT tests
427
Avg miles / year
0.3
Faults per test
0%
Dangerous-fault share
Triumph T21 problem areas
Where faults occur most across all Triumph T21 MOT tests:
-
Other101%
-
Steering21%
-
Lamps & electrical3%
-
Brakes2%
Triumph T21 pass rate by age
| Age (years) | Tests | Pass rate |
|---|---|---|
| 1 | 8 | 88% |
| 2 | 3 | 100% |
| 3 | 3 | 100% |
| 4 | 3 | 100% |
| 5 | 5 | 80% |
| 6 | 4 | 100% |
| 7 | 5 | 80% |
| 8 | 4 | 100% |
| 9 | 5 | 100% |
| 10 | 5 | 100% |
| 11 | 4 | 100% |
| 12 | 6 | 100% |
| 13 | 6 | 100% |
| 14 | 7 | 86% |
| 15 | 6 | 83% |
| 16 | 4 | 100% |
| 17 | 5 | 100% |
| 18 | 4 | 100% |
| 19 | 2 | 100% |
| 20 | 3 | 100% |
Fuel types: Petrol (113), Other (1)
Most common Triumph T21 MOT faults
These are the faults and advisories recorded most often across Triumph T21 MOT tests:
- Steering headbearing has slight free play (2.2.2) (14 times)
- Front wheel bearings have slight free play (2.3.5b) (9 times)
- Rear wheel bearings have slight free play (2.4.A.2c) (9 times)
- Wheel alignment slightly misaligned. (2.5.1) (7 times)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (6 times)
- Front wheel bearings are slightly rough (2.3.5b) (5 times)
- Front Wheel has a slightly distorted bead rim. (4.2.2) (4 times)
- Offside Front shock absorber has light misting of stanchion (2.3.3) (4 times)
- No lights fitted at time of test (4 times)
- Drive chain slightly loose (6.2.1d) (4 times)
- Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) (3 times)
- Rear shock absorber has a slightly reduced damping effect (2.4.A.3b) (3 times)
- Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) (3 times)
- Horn not working (1.7.3a) (3 times)
- Front Tyre worn close to the legal limit (4.1.3(ii)) (3 times)
Triumph T21 pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2014 | 1 | 4 | 100% | 246 |
| 2010 | 1 | 2 | 100% | 11,838 |
| 2009 | 2 | 11 | 100% | 12,986 |
| 2006 | 1 | 2 | 100% | 3,714 |
| 2005 | 2 | 4 | 75% | 136 |
| 2002 | 1 | 7 | 100% | 3,675 |
| 2001 | 2 | 18 | 83% | 4,348 |
| 1999 | 1 | 3 | 100% | 12,501 |
| 1998 | 3 | 23 | 96% | 46,398 |
| 1997 | 1 | 4 | 100% | 30,542 |
| 1996 | 1 | 9 | 100% | 33,657 |
| 1993 | 1 | 3 | 100% | 13,096 |
| 1989 | 2 | 9 | 89% | 8,062 |
| 1987 | 1 | 7 | 100% | 60,894 |
| 1985 | 1 | 5 | 100% | 22,926 |
| 1984 | 4 | 31 | 87% | 29,891 |
| 1982 | 1 | 6 | 100% | 54,307 |
| 1980 | 3 | 18 | 89% | 31,117 |
| 1978 | 1 | 3 | 100% | — |
| 1966 | 3 | 18 | 89% | 13,992 |
| 1965 | 3 | 13 | 100% | 43,712 |
| 1964 | 4 | 29 | 93% | 11,102 |
| 1963 | 4 | 26 | 96% | 27,622 |
| 1962 | 9 | 60 | 97% | 26,354 |
| 1961 | 14 | 63 | 97% | 30,439 |
| 1960 | 10 | 64 | 94% | 10,299 |
| 1959 | 8 | 30 | 90% | 28,667 |
| 1958 | 25 | 86 | 92% | 21,447 |
| 1957 | 3 | 17 | 82% | 7,118 |
Triumph T21 reliability FAQ
Across 114 Triumph T21 vehicles in our MOT data,
93% pass the MOT (a 7% failure rate), with about
0.3 faults or advisories recorded per test.
The most frequently recorded Triumph T21 MOT issues are:
Steering headbearing has slight free play (2.2.2); Front wheel bearings have slight free play (2.3.5b); Rear wheel bearings have slight free play (2.4.A.2c).
The typical Triumph T21 in our data has covered around
22,953 miles.
Compare the Triumph T21
See how the Triumph T21 stacks up against other Triumph models on MOT reliability:
Check a specific Triumph T21
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