# Triumph S MOT reliability: pass rate and common failures | RegFlags

The Triumph S passed its MOT first time 75% of the time, but from only 73 MOT tests, so treat it as a rough guide. See pass rates by year, common failures and typical mileage.

- First-time MOT pass rate: 75%
- MOT tests analysed: 73 (DVSA anonymised MOT data, 2025)
- Most common failure area: Lights & electrics

These figures come from 73 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

## By year of first use and fuel

| Year | Fuel | MOT tests | First-time pass rate |
| --- | --- | --- | --- |
| 1978 | Petrol | 5 (very few mots) | 100% |
| 1977 | Petrol | 14 (very few mots) | 71% |
| 1976 | Petrol | 8 (very few mots) | 75% |
| 1975 | Petrol | 6 (very few mots) | 83% |
| 1974 | Petrol | 9 (very few mots) | 78% |
| 1973 | Petrol | 14 (very few mots) | 57% |
| 1972 | Petrol | 8 (very few mots) | 63% |
| 1971 | Petrol | 4 (very few mots) | 100% |
| 1970 | Petrol | 5 (very few mots) | 100% |

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