Data as of: DVSA MOT results to 2025
Bsa B33: MOT pass rate by registration year
Which B33 years pass first time, and which fall short of the model's 91.8% average, from 1,121 DVSA tests.
Pass rate by registration year
Highest pass rate: 1960 (97.4% of 77 tests). Lowest: 1957 (87.3% of 79). Years more than two points below the model average: 1957, 1958.
| Registered | Tests | First-time pass | vs model (91.8%) |
|---|---|---|---|
| 1949 | 73 | 91.8% | +0.0 pp |
| 1950 | 59 | 96.6% | +4.8 pp |
| 1954 | 136 | 94.1% | +2.3 pp |
| 1955 | 124 | 95.2% | +3.4 pp |
| 1956 | 103 | 91.3% | -0.5 pp |
| 1957 | 79 | 87.3% | -4.5 pp |
| 1958 | 93 | 88.2% | -3.6 pp |
| 1959 | 115 | 90.4% | -1.4 pp |
| 1960 | 77 | 97.4% | +5.6 pp |
Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.
Pass rate over time
Questions
- Which B33 years have the lowest MOT pass rate?
- 1957, 1958 registered examples pass first time less often than the Bsa B33 overall (91.8%); the 1957 cohort is lowest at 87.3% from 79 tests.
- Which B33 year has the highest MOT pass rate?
- 1960, at 97.4% of 77 first tests (2005–2025). Years more than two points above the model average: 1950, 1954, 1955, 1960.
- How much does the B33 pass rate vary by year?
- 10.1 percentage points between the highest (1960, 97.4%) and lowest (1957, 87.3%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
Full report: Bsa B33 reliability, failures and mileage · ranked #507 of 5428 models· other Bsa models: A10, Bantam, C15, A65, B31, B40