Sunbeam S7: MOT pass rate by registration year

Which S7 years pass first time, and which fall short of the model's 90.7% average, from 935 DVSA tests.

1953

highest-passing year · 94.7%

1957

lowest-passing year · 84.3%

10.4pp

spread across 7 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: 1953 (94.7% of 75 tests). Lowest: 1957 (84.3% of 51). Years more than two points below the model average: 1954, 1957.

Registered	Tests	First-time pass	vs model (90.7%)
1948	52	94.2%	+3.5 pp
1950	211	93.4%	+2.7 pp
1951	158	90.5%	-0.2 pp
1952	155	91.0%	+0.3 pp
1953	75	94.7%	+4.0 pp
1954	57	87.7%	-3.0 pp
1957	51	84.3%	-6.4 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 · 2005–2012

Questions

Which S7 years have the lowest MOT pass rate?: 1954, 1957 registered examples pass first time less often than the Sunbeam S7 overall (90.7%); the 1957 cohort is lowest at 84.3% from 51 tests.
Which S7 year has the highest MOT pass rate?: 1953, at 94.7% of 75 first tests (2005–2025). Years more than two points above the model average: 1948, 1950, 1953.
How much does the S7 pass rate vary by year?: 10.4 percentage points between the highest (1953, 94.7%) and lowest (1957, 84.3%) 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: Sunbeam S7 reliability, failures and mileage · ranked #748 of 5428 models· other Sunbeam models: S8, Model 9, Model 8, 9