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Triumph Steet triple 675 vs Triumph Unknown: reliability comparison

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

Triumph Steet triple 675
95%
MOT pass rate · 2 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Steet triple 675 (95%) 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 Steet triple 675 Triumph Unknown
MOT pass rate 95% ✓ 89%
MOT failure rate 5% ✓ 11%
Faults & advisories per test 0.5 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 14,562 mi 16,601 mi
Sample size (vehicles) 2 65,927

Most common faults

Triumph Steet triple 675

  1. Exhaust noisy (8.1.1 (a))
  2. Front Roller brake test indicates a slightly grabbing brake (3.3.A1b)
  3. Offside Headlamp aim too low (1.6)
  4. Exhaust noisy (7.1.2)
  5. Bike fitted with an aftermarket exhaust silencer but not excessively loud.

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 Steet triple 675 (95%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Steet triple 675 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.