Bentley S type vs Bentley Unknown: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bentley S type
83%
MOT pass rate · 13 vehicles
Bentley Unknown
90%
MOT pass rate · 9,548 vehicles
Verdict: On MOT pass rate the Bentley S type (83%) and Bentley Unknown (90%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Bentley S type | Bentley Unknown |
|---|---|---|
| MOT pass rate | 83% | 90% ✓ |
| MOT failure rate | 17% | 10% ✓ |
| Faults & advisories per test | 1.1 | 0.9 ✓ |
| Dangerous-fault share | 2% ✓ | 7% |
| Average mileage | 57,050 mi | 34,409 mi |
| Sample size (vehicles) | 13 | 9,548 |
Most common faults
Bentley S type
- Oil leak
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Service brake: efficiency below requirements (3.7.B.7)
- Under body under-sealed.
- Steering system has slight free play detected at steering wheel (2.2.A.1a)
- Nearside Front Upper Axle king pin has slight play in pin and/or bush (2.5.A.3a)
Bentley Unknown
- COVID-19 6 MONTH EXTENSION
- Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))
- Parking brake: efficiency below requirements (3.7.B.7)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Oil leak
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Bentley S type (83%) and Bentley Unknown (90%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Bentley S type report Full Bentley 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.