Bsa B44: MOT pass rate by registration year

Which B44 years pass first time, and which fall short of the model's 90.2% average, from 620 DVSA tests.

1966

highest-passing year · 94.8%

1970

lowest-passing year · 88.5%

6.3pp

spread across 5 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 1966 (94.8% of 58 tests). Lowest: 1970 (88.5% of 87).

Registered	Tests	First-time pass	vs model (90.2%)
1966	58	94.8%	+4.6 pp
1967	150	92.7%	+2.5 pp
1968	160	88.8%	-1.4 pp
1969	124	90.3%	+0.1 pp
1970	87	88.5%	-1.7 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

first-time pass rate by test year · 2006–2017

Questions

Which B44 years have the lowest MOT pass rate?: none: no registration year of the Bsa B44 falls more than two points under the model's 90.2% overall pass rate.
Which B44 year has the highest MOT pass rate?: 1966, at 94.8% of 58 first tests (2005–2025). Years more than two points above the model average: 1966, 1967.
How much does the B44 pass rate vary by year?: 6.3 percentage points between the highest (1966, 94.8%) and lowest (1970, 88.5%) 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 B44 reliability, failures and mileage · ranked #884 of 5428 models· other Bsa models: A10, Bantam, C15, A65, B31, B40