MOT reliability
Triumph Unknown
65,927 vehicles · 3,784 completed MOT tests analysed
89%
MOT pass rate
Based on 65,927 Triumph Unknown vehicles and 3,784 completed MOT tests, the Triumph Unknown has an overall 89% pass rate, with an average recorded mileage of 16,601 miles.
65,927
Vehicles
3,784
MOT tests
784
Avg miles / year
0.6
Faults per test
2%
Dangerous-fault share
Triumph Unknown problem areas
Where faults occur most across all Triumph Unknown MOT tests:
-
Other52%
-
Tyres, wheels & suspension14%
-
Brakes14%
-
Steering10%
-
Lamps & electrical9%
-
Body & structure4%
-
Emissions & nuisance4%
-
Seatbelts & equipment3%
Triumph Unknown pass rate by age
How the Triumph Unknown's MOT pass rate changes as it ages (buckets with 20+ tests).
| Age (years) | Tests | Pass rate |
|---|---|---|
| 1 | 41 | 93% |
| 2 | 27 | 89% |
| 3 | 113 | 96% |
| 4 | 64 | 95% |
| 5 | 44 | 98% |
| 6 | 46 | 89% |
| 7 | 34 | 88% |
| 8 | 19 | 89% |
| 9 | 21 | 81% |
| 10 | 14 | 86% |
| 11 | 6 | 83% |
| 12 | 3 | 100% |
| 13 | 3 | 67% |
| 14 | 7 | 86% |
| 15 | 6 | 100% |
| 16 | 3 | 100% |
| 17 | 7 | 71% |
| 18 | 10 | 90% |
| 19 | 17 | 76% |
| 20 | 24 | 75% |
Fuel types: Petrol (65,801), Other (81), Diesel (39), Gas (2), Electric (2), LPG (1), Fuel Cells (1)
Most common Triumph Unknown MOT faults
These are the faults and advisories recorded most often across Triumph Unknown MOT tests:
- Exhaust noisy (8.1.1 (a)) (50 times)
- Exhaust noisy (7.1.2) (38 times)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (28 times)
- COVID-19 6 MONTH EXTENSION (27 times)
- Rear Tyre worn close to the legal limit (5.2.3 (e)) (27 times)
- Steering headbearing has slight free play (2.2.2) (25 times)
- Nearside Front Shock absorber has a light misting of oil (5.3.2 (b)) (24 times)
- Front Brake indicates slight fluctuation of brake effort (1.2.1 (e)) (23 times)
- Rear Roller brake test indicates slight fluctuation of brake effort (3.3.A1d) (21 times)
- Front Tyre worn close to the legal limit (5.2.3 (e)) (20 times)
- Chain guard missing (20 times)
- Steering headbearing has slight free play (2.2.2 (f) (i)) (20 times)
- Rear Brake indicates slight fluctuation of brake effort (1.2.1 (e)) (19 times)
- Wheel alignment slightly misaligned. (2.5.1) (17 times)
- Front Brake binding but not excessively (1.2.1 (f)) (17 times)
Triumph Unknown pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2023 | 5 | 5 | 100% | 12,740 |
| 2022 | 6 | 6 | 100% | 8,839 |
| 2021 | 14 | 19 | 95% | 10,289 |
| 2020 | 30 | 55 | 98% | 5,950 |
| 2019 | 38 | 99 | 93% | 8,019 |
| 2018 | 5 | 9 | 78% | 37,545 |
| 2017 | 33 | 54 | 98% | 6,931 |
| 2016 | 34 | 74 | 93% | 10,913 |
| 2015 | 20 | 76 | 87% | 15,214 |
| 2014 | 8 | 26 | 96% | 11,741 |
| 2013 | 4 | 5 | 80% | 18,583 |
| 2012 | 4 | 14 | 71% | 8,581 |
| 2010 | 1 | 8 | 62% | 19,962 |
| 2009 | 1 | 2 | 100% | 3,812 |
| 2008 | 2 | 5 | 100% | 20,503 |
| 2007 | 1 | 1 | 100% | 1 |
| 2006 | 3 | 7 | 86% | 1,882 |
| 2005 | 2 | 4 | 75% | 1,585 |
| 2004 | 2 | 2 | 100% | 5,466 |
| 2003 | 3 | 5 | 80% | 24,863 |
| 2002 | 5 | 18 | 83% | 36,405 |
| 2001 | 2 | 2 | 100% | 174 |
| 2000 | 3 | 6 | 83% | 18,483 |
| 1999 | 5 | 12 | 92% | 8,988 |
| 1998 | 15 | 37 | 86% | 10,906 |
| 1997 | 17 | 36 | 86% | 10,281 |
| 1996 | 41 | 143 | 80% | 14,704 |
| 1995 | 50 | 127 | 87% | 13,650 |
| 1994 | 44 | 115 | 82% | 18,605 |
| 1993 | 55 | 173 | 84% | 20,822 |
| 1992 | 40 | 94 | 84% | 17,841 |
| 1991 | 28 | 80 | 91% | 20,196 |
| 1990 | 11 | 17 | 100% | 9,153 |
| 1989 | 10 | 12 | 92% | 16,666 |
| 1988 | 6 | 9 | 78% | 6,715 |
| 1987 | 14 | 33 | 85% | 12,909 |
| 1986 | 7 | 11 | 91% | 13,226 |
| 1985 | 7 | 18 | 89% | 2,492 |
| 1984 | 19 | 30 | 90% | 11,515 |
| 1983 | 18 | 29 | 86% | 13,822 |
| 1982 | 25 | 64 | 92% | 16,728 |
| 1981 | 53 | 104 | 87% | 17,395 |
| 1980 | 66 | 141 | 89% | 16,873 |
| 1979 | 63 | 107 | 91% | 18,329 |
| 1978 | 73 | 132 | 89% | 15,995 |
| 1977 | 69 | 107 | 90% | 17,693 |
| 1976 | 52 | 88 | 85% | 15,392 |
| 1975 | 68 | 120 | 84% | 22,917 |
| 1974 | 33 | 59 | 92% | 19,669 |
| 1973 | 73 | 118 | 91% | 21,568 |
| 1972 | 40 | 67 | 90% | 17,187 |
| 1971 | 45 | 70 | 87% | 24,790 |
| 1970 | 57 | 80 | 88% | 13,773 |
| 1969 | 43 | 65 | 89% | 11,332 |
| 1968 | 44 | 62 | 98% | 13,553 |
| 1967 | 46 | 63 | 90% | 19,735 |
| 1966 | 59 | 88 | 92% | 14,278 |
| 1965 | 39 | 64 | 91% | 13,081 |
| 1964 | 51 | 81 | 90% | 16,722 |
| 1963 | 57 | 75 | 91% | 20,458 |
| 1962 | 58 | 91 | 87% | 17,117 |
| 1961 | 82 | 112 | 91% | 12,497 |
| 1960 | 68 | 93 | 90% | 18,401 |
| 1959 | 42 | 50 | 94% | 17,062 |
| 1958 | 26 | 32 | 91% | 16,080 |
| 1957 | 12 | 13 | 100% | 19,733 |
| 1956 | 9 | 9 | 100% | 33,284 |
| 1955 | 7 | 10 | 80% | 20,520 |
| 1954 | 8 | 8 | 100% | 1,205 |
| 1953 | 10 | 12 | 83% | 39,523 |
| 1952 | 6 | 8 | 100% | 38,599 |
| 1951 | 2 | 2 | 100% | 8,544 |
| 1950 | 4 | 5 | 80% | 37,052 |
| 1949 | 8 | 13 | 92% | 35,483 |
| 1948 | 5 | 7 | 100% | 44,575 |
| 1947 | 5 | 7 | 86% | 7,802 |
| 1946 | 2 | 2 | 100% | 14,402 |
| 1945 | 1 | 1 | 100% | 22,939 |
| 1937 | 4 | 5 | 100% | 7,913 |
| 1935 | 6 | 7 | 86% | 26,734 |
| 1932 | 1 | 1 | 100% | — |
| 1931 | 1 | 1 | 100% | — |
| 1930 | 2 | 3 | 100% | — |
| 1929 | 1 | 1 | 100% | — |
| 1927 | 2 | 4 | 75% | — |
| 1926 | 2 | 2 | 100% | — |
| 1925 | 1 | 1 | 100% | — |
| 1922 | 1 | 2 | 100% | — |
| 1901 | 2 | 2 | 100% | 19,036 |
Triumph Unknown reliability FAQ
Across 65,927 Triumph Unknown vehicles in our MOT data,
89% pass the MOT (a 11% failure rate), with about
0.6 faults or advisories recorded per test.
The most frequently recorded Triumph Unknown MOT issues are:
Exhaust noisy (8.1.1 (a)); Exhaust noisy (7.1.2); Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d).
The typical Triumph Unknown in our data has covered around
16,601 miles.
Compare the Triumph Unknown
See how the Triumph Unknown stacks up against other Triumph models on MOT reliability:
Check a specific Triumph Unknown
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