Ford Fiesta vs Ford Fiesta st-line: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Ford Fiesta
73%
MOT pass rate · 2,835,744 vehicles
Ford Fiesta st-line
86%
MOT pass rate · 402 vehicles
More reliable
Verdict: On MOT pass rate, the Ford Fiesta st-line is the more reliable of the two — 86% pass first time versus 73%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Ford Fiesta | Ford Fiesta st-line |
|---|---|---|
| MOT pass rate | 73% | 86% ✓ |
| MOT failure rate | 27% | 14% ✓ |
| Faults & advisories per test | 2.1 | 0.1 ✓ |
| Dangerous-fault share | 2% ✓ | 3% |
| Average mileage | 84,529 mi | 64,435 mi |
| Sample size (vehicles) | 2,835,744 | 402 |
Most common faults
Ford Fiesta
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- 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))
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Brake pipe slightly corroded (3.6.B.2c)
Ford Fiesta st-line
- Nearside Rear Child Seat fitted not allowing full inspection of adult belt
- Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
- TPMS LIGHT IS ON
- TPMS LIGHT ON
- Offside Front BUMPER DAMAGED
- Offside Rear Tyre slightly damaged/cracking or perishing perished (5.2.3 (d) (ii))
Reliability FAQ
On MOT pass rate, the Ford Fiesta st-line is the more reliable of the two — 86% pass first time versus 73%. It's one signal among several; check the full breakdown below.
Full Ford Fiesta report Full Ford Fiesta st-line 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.