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Bentley 4 door saloon vs Bentley Unknown: reliability comparison

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

Bentley 4 door saloon
80%
MOT pass rate · 9 vehicles
Bentley Unknown
90%
MOT pass rate · 9,548 vehicles
Verdict: On MOT pass rate the Bentley 4 door saloon (80%) 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 4 door saloon Bentley Unknown
MOT pass rate 80% 90% ✓
MOT failure rate 20% 10% ✓
Faults & advisories per test 1.7 0.9 ✓
Dangerous-fault share 0% ✓ 7%
Average mileage 81,476 mi 34,409 mi
Sample size (vehicles) 9 9,548

Most common faults

Bentley 4 door saloon

  1. Oil leak
  2. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Body has slight corrosion (6.1.B.2)
  4. Offside Front Tyre has ply or cords exposed (4.1.D.1b)
  5. Offside Rear Brake cable has wires broken but is not significantly weakened (3.5.1b)
  6. Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)

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 4 door saloon (80%) and Bentley Unknown (90%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bentley 4 door 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.