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Triumph Dolomite auto vs Triumph Unknown: reliability comparison

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

Triumph Dolomite auto
83%
MOT pass rate · 6,092 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Dolomite auto (83%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Triumph Dolomite auto Triumph Unknown
MOT pass rate 83% 89% ✓
MOT failure rate 17% 11% ✓
Faults & advisories per test 1.3 0.6 ✓
Dangerous-fault share 0% ✓ 2%
Average mileage 48,042 mi 16,601 mi
Sample size (vehicles) 6,092 65,927

Most common faults

Triumph Dolomite auto

  1. Nearside Front wheel bearing has slight play (2.5.A.3c)
  2. Offside Front wheel bearing has slight play (2.5.A.3c)
  3. Exhaust has a minor leak of exhaust gases (7.1.2)
  4. Offside Headlamp not working on main beam (1.7.5a)
  5. Parking brake: efficiency below requirements (3.7.B.7)
  6. Windscreen washer provides insufficient washer liquid (8.2.3)

Triumph Unknown

  1. Exhaust noisy (8.1.1 (a))
  2. Exhaust noisy (7.1.2)
  3. Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
  4. COVID-19 6 MONTH EXTENSION
  5. Rear Tyre worn close to the legal limit (5.2.3 (e))
  6. Steering headbearing has slight free play (2.2.2)

Reliability FAQ

On MOT pass rate the Triumph Dolomite auto (83%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Dolomite auto report Full Triumph 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.