Fiat 500 vs Fiat Dethiefs: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Fiat 500
77%
MOT pass rate · 333,596 vehicles
Fiat Dethiefs
73%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Fiat 500 (77%) and Fiat Dethiefs (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Fiat 500 | Fiat Dethiefs |
|---|---|---|
| MOT pass rate | 77% ✓ | 73% |
| MOT failure rate | 23% ✓ | 27% |
| Faults & advisories per test | 2.0 | 1.1 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 62,906 mi | 115,344 mi |
| Sample size (vehicles) | 333,596 | 1 |
Most common faults
Fiat 500
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
- Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Rear Coil spring corroded (5.3.1 (b) (i))
Fiat Dethiefs
- Front brake disc slightly pitted (3.5.1h)
- Rear Suspension weakened but no possibility of the body or a component fouling a road wheel (2.4.A.1b)
- Offside Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
- Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
- Offside Rear fog lamp not working (1.3.2b)
- Nearside Front Direction indicators not working (1.4.A.2c)
Reliability FAQ
On MOT pass rate the Fiat 500 (77%) and Fiat Dethiefs (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Fiat 500 report Full Fiat Dethiefs report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.