Triumph 1500 vs Triumph T r 4: 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 T r 4
71%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph T r 4 (71%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1500 | Triumph T r 4 |
|---|---|---|
| MOT pass rate | 74% ✓ | 71% |
| MOT failure rate | 26% ✓ | 29% |
| Faults & advisories per test | 2.3 | 1.7 ✓ |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 58,068 mi | 51,370 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 T r 4
- Exhaust has a minor leak of exhaust gases (7.1.2)
- Oil leak
- rear brake application uneven (3.7.B.2)
- Front Brake pad(s) wearing thin (3.5.1g)
- Nearside Front Play in steering rack inner joint(s)
- Nearside Track rod end ball joint dust cover deteriorated, but preventing the ingress of dirt (2.2.C.1c)
Reliability FAQ
On MOT pass rate the Triumph 1500 (74%) and Triumph T r 4 (71%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1500 report Full Triumph T r 4 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.