# Ariel Atom 4 Unclassified MOT reliability: pass rate and common failures | RegFlags

The Ariel Atom 4 Unclassified passed its MOT first time 92% of the time, but from only 39 MOT tests, so treat it as a rough guide. See pass rates by year, common failures and typical mileage.

- First-time MOT pass rate: 92%
- MOT tests analysed: 39 (DVSA anonymised MOT data, 2025)
- Most common failure area: Exhaust, emissions & leaks

These figures come from 39 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 |
| --- | --- | --- | --- |
| 2022 | Petrol | 22 (few mots) | 96% |
| 2021 | Petrol | 17 (very few mots) | 88% |

---

Canonical page: https://regflags.co.uk/reliability/ariel-atom-4/unclassified
RegFlags by Steady Circuit Ltd.