Triumph 1500 vs Triumph St900: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph 1500
74%
MOT pass rate · 37,142 vehicles
Triumph St900
75%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph St900 (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph St900 |
|---|---|---|
| MOT pass rate | 74% | 75% ✓ |
| MOT failure rate | 26% | 25% ✓ |
| Faults & advisories per test | 2.3 | 2.2 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | 24,327 mi |
| Sample size (vehicles) | 37,142 | 1 |
Most common faults
Triumph 1500
- Parking brake: efficiency below requirements (3.7.B.7)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Rear wheel bearing has slight play (2.6.2)
- Offside Rear wheel bearing has slight play (2.6.2)
- Brakes imbalanced across an axle (3.7.B.5b)
- Oil leak
Triumph St900
- Front Brake pad(s) contaminated by oil or grease (3.2.A1k)
- Front Front shock absorber seal failed and leaking oil (2.3.3)
- Front Stop lamp does not illuminate immediately a brake applies (1.3.1a)
- Headlamp at least one does not illuminate on dipped beam (1.2.2a(i))
- Headlamp at least one does not illuminate on main beam (1.2.2a(ii))
- Horn not working (1.7.3a)
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph St900 (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph St900 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.