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Triumph Scambler vs Triumph Unknown: reliability comparison

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

Triumph Scambler
93%
MOT pass rate · 2 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Scambler (93%) 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 Scambler Triumph Unknown
MOT pass rate 93% ✓ 89%
MOT failure rate 7% ✓ 11%
Faults & advisories per test 0.3 ✓ 0.6
Dangerous-fault share 11% 2% ✓
Average mileage 8,091 mi 16,601 mi
Sample size (vehicles) 2 65,927

Most common faults

Triumph Scambler

  1. Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  2. Front Tyre worn close to the legal limit worn unevenly areas close to the legal limit (5.2.3 (e))
  3. Rear Tyre worn close to the legal limit (4.1.3(ii))
  4. Headlamp aim too low (1.6)
  5. Rear position lamp insecure (1.1.1c)
  6. Rear Brake pad(s) close to minimum limit (1.1.13 (a))

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 Scambler (93%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Scambler 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.