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Bentley Mk 6 saloon vs Bentley Unknown: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Bentley Mk 6 saloon
55%
MOT pass rate · 2 vehicles
Bentley Unknown
90%
MOT pass rate · 9,548 vehicles
Verdict: On MOT pass rate the Bentley Mk 6 saloon (55%) 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 Mk 6 saloon Bentley Unknown
MOT pass rate 55% 90% ✓
MOT failure rate 45% 10% ✓
Faults & advisories per test 1.4 0.9 ✓
Dangerous-fault share 0% ✓ 7%
Average mileage 58,097 mi 34,409 mi
Sample size (vehicles) 2 9,548

Most common faults

Bentley Mk 6 saloon

  1. Windscreen washer provides insufficient washer liquid (8.2.3)
  2. Nearside Rear Shock absorber has a light misting of oil (2.7.3)
  3. Offside Front Drag link end ball joint has excessive play (2.2.B.1f)
  4. Offside Outer Track rod end ball joint has excessive play (2.2.B.1f)
  5. Offside Rear Shock absorber has a light misting of oil (2.7.3)
  6. nearside headlight output poor

Bentley Unknown

  1. COVID-19 6 MONTH EXTENSION
  2. Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))
  3. Parking brake: efficiency below requirements (3.7.B.7)
  4. Windscreen washer provides insufficient washer liquid (8.2.3)
  5. Oil leak
  6. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Bentley Mk 6 saloon (55%) and Bentley Unknown (90%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bentley Mk 6 saloon 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.