Fiat 500 vs Fiat Siata: 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 Siata
86%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Fiat 500 (77%) and Fiat Siata (86%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Fiat 500 | Fiat Siata |
|---|---|---|
| MOT pass rate | 77% | 86% ✓ |
| MOT failure rate | 23% | 14% ✓ |
| Faults & advisories per test | 2.0 | 0.6 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 62,906 mi | 66,132 mi |
| Sample size (vehicles) | 333,596 | 2 |
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 Siata
- Front n/s tyre outer wall badly cracking
- Front o/s wheel bearing slightly noisey when spun
- N/S track rod end rubber dust cover split but no play in joint
- Slight play in front suspension joints
- Underbody heavily covered in underseal and anti corrosion sealant making inspection hard. Also extensive welding appears to have been carried out to outer floor areas and parts of chassis sections .
- Fuel cap/sealing device sealing washer torn (7.2.4c)
Reliability FAQ
On MOT pass rate the Fiat 500 (77%) and Fiat Siata (86%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Fiat 500 report Full Fiat Siata 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.