# Jaguar 420 MOT reliability: pass rate and common failures | RegFlags

The Jaguar 420 passed its MOT first time 96% of the time, but from only 28 MOT tests, so treat it as a rough guide. See pass rates by year, common failures and typical mileage.

- First-time MOT pass rate: 96%
- MOT tests analysed: 28 (DVSA anonymised MOT data, 2025)
- Most common failure area: Lights & electrics
- Licensed in Great Britain: 348 (2026 Q2)

These figures come from 28 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 |
| --- | --- | --- | --- |
| 1982 | Petrol | 1 (very few mots) | 100% |
| 1979 | Petrol | 1 (very few mots) | 100% |
| 1970 | Petrol | 2 (very few mots) | 100% |
| 1969 | Petrol | 1 (very few mots) | 100% |
| 1968 | Petrol | 15 (very few mots) | 93% |
| 1967 | Petrol | 7 (very few mots) | 100% |
| 1966 | Petrol | 1 (very few mots) | 100% |

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