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Triumph Acclaim hls vs Triumph Unknown: reliability comparison

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

Triumph Acclaim hls
67%
MOT pass rate · 31,698 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Acclaim hls (67%) 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 Acclaim hls Triumph Unknown
MOT pass rate 67% 89% ✓
MOT failure rate 33% 11% ✓
Faults & advisories per test 1.5 0.6 ✓
Dangerous-fault share 0% ✓ 2%
Average mileage 68,139 mi 16,601 mi
Sample size (vehicles) 31,698 65,927

Most common faults

Triumph Acclaim hls

  1. Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
  2. Nearside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
  3. Exhaust emissions carbon monoxide content excessive (7.3.B.1a)
  4. Parking brake: efficiency below requirements (3.7.B.7)
  5. Nearside Rear Rear wheel bearing has slight play (2.6.2)
  6. Offside Rear Rear wheel bearing has slight play (2.6.2)

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 Acclaim hls (67%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Acclaim hls 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.