Data as of: DVSA MOT results to 2025
Bsa M20: MOT pass rate by registration year
Which M20 years pass first time, and which fall short of the model's 91.4% average, from 1,295 DVSA tests.
Pass rate by registration year
Highest pass rate: 1940 (97.5% of 119 tests). Lowest: 1944 (80.6% of 72). Years more than two points below the model average: 1942, 1943, 1944, 1968.
| Registered | Tests | First-time pass | vs model (91.4%) |
|---|---|---|---|
| 1939 | 102 | 92.2% | +0.8 pp |
| 1940 | 119 | 97.5% | +6.1 pp |
| 1942 | 61 | 85.2% | -6.2 pp |
| 1943 | 64 | 85.9% | -5.5 pp |
| 1944 | 72 | 80.6% | -10.8 pp |
| 1946 | 58 | 94.8% | +3.4 pp |
| 1947 | 81 | 97.5% | +6.1 pp |
| 1967 | 53 | 96.2% | +4.8 pp |
| 1968 | 72 | 88.9% | -2.5 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 M20 years have the lowest MOT pass rate?
- 1942, 1943, 1944, 1968 registered examples pass first time less often than the Bsa M20 overall (91.4%); the 1944 cohort is lowest at 80.6% from 72 tests.
- Which M20 year has the highest MOT pass rate?
- 1940, at 97.5% of 119 first tests (2005–2025). Years more than two points above the model average: 1940, 1946, 1947, 1967.
- How much does the M20 pass rate vary by year?
- 16.9 percentage points between the highest (1940, 97.5%) and lowest (1944, 80.6%) 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 M20 reliability, failures and mileage · ranked #588 of 5428 models· other Bsa models: A10, Bantam, C15, A65, B31, B40