Honda Sj50 vs Honda Unknown: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Honda Sj50
81%
MOT pass rate · 377 vehicles
Honda Unknown
85%
MOT pass rate · 1,041,859 vehicles
More reliable
Verdict: On MOT pass rate, the Honda Unknown is the more reliable of the two — 85% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Honda Sj50 | Honda Unknown |
|---|---|---|
| MOT pass rate | 81% | 85% ✓ |
| MOT failure rate | 19% | 15% ✓ |
| Faults & advisories per test | 0.7 ✓ | 0.9 |
| Dangerous-fault share | 1% ✓ | 3% |
| Average mileage | 15,828 mi | 25,474 mi |
| Sample size (vehicles) | 377 | 1,041,859 |
Most common faults
Honda Sj50
- Rear Tyre worn close to the legal limit (4.1.3(i))
- Front Brake pad(s) close to minimum limit (3.2.A1f(i))
- Front Brake pad(s) less than 1.5 mm thick (3.2.A1f(i))
- Front Brake disc(s) slightly worn (3.2.A1l)
- Headlamp aim too high (1.6)
- Exhaust slightly deteriorated (7.1.1a)
Honda Unknown
- Exhaust noisy (8.1.1 (a))
- Rear Tyre worn close to the legal limit (5.2.3 (e))
- Chain guard missing
- Rear reflector missing (4.8.2 (a) (ii))
- Drive chain slightly loose (6.1.7 (c) (i))
- Front Brake binding but not excessively (1.2.1 (f))
Reliability FAQ
On MOT pass rate, the Honda Unknown is the more reliable of the two — 85% pass first time versus 81%. It's one signal among several; check the full breakdown below.
Full Honda Sj50 report Full Honda 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.