Volvo Fh12 vs Volvo Unknown: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Volvo Fh12
77%
MOT pass rate · 153 vehicles
Volvo Unknown
86%
MOT pass rate · 319,034 vehicles
More reliable
Verdict: On MOT pass rate, the Volvo Unknown is the more reliable of the two — 86% pass first time versus 77%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Volvo Fh12 | Volvo Unknown |
|---|---|---|
| MOT pass rate | 77% | 86% ✓ |
| MOT failure rate | 23% | 14% ✓ |
| Faults & advisories per test | 0.0 ✓ | 0.7 |
| Dangerous-fault share | — ✓ | 4% |
| Average mileage | 898,735 mi | 431,427 mi |
| Sample size (vehicles) | 153 | 319,034 |
Most common faults
Volvo Fh12
No fault breakdown available.
Volvo Unknown
- Oil leak, but not excessive (8.4.1 (a) (i))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Parking brake efficiency below requirements (1.4.2 (a) (i))
- Service brake efficiency below requirements (1.2.2 (a) (i))
- Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
Reliability FAQ
On MOT pass rate, the Volvo Unknown is the more reliable of the two — 86% pass first time versus 77%. It's one signal among several; check the full breakdown below.
Full Volvo Fh12 report Full Volvo Unknown 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.