Fiat 133 vs Fiat 500: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Fiat 133
68%
MOT pass rate · 2,236 vehicles
Fiat 500
77%
MOT pass rate · 333,596 vehicles
Verdict: On MOT pass rate the Fiat 133 (68%) and Fiat 500 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Fiat 133 | Fiat 500 |
|---|---|---|
| MOT pass rate | 68% | 77% ✓ |
| MOT failure rate | 32% | 23% ✓ |
| Faults & advisories per test | 3.0 | 2.0 ✓ |
| Dangerous-fault share | 0% ✓ | 3% |
| Average mileage | 44,407 mi | 62,906 mi |
| Sample size (vehicles) | 2,236 | 333,596 |
Most common faults
Fiat 133
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Nearside Front wheel bearing has slight play (2.5.A.3c)
- Driver's seat insecure (6.2.A.1)
- Offside Headlamp not working on main beam (1.7.5a)
- front brake application uneven (3.7.B.2)
- Nearside Front position lamp(s) not working (1.1.A.3b)
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))
Reliability FAQ
On MOT pass rate the Fiat 133 (68%) and Fiat 500 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Fiat 133 report Full Fiat 500 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.