Ajs Cadwell: MOT pass rate by registration year

Which Cadwell years pass first time, and which fall short of the model's 74.5% average, from 1,263 DVSA tests.

2017

highest-passing year · 83.3%

2019

lowest-passing year · 59.8%

23.5pp

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: 2017 (83.3% of 456 tests). Lowest: 2019 (59.8% of 87). Years more than two points below the model average: 2016, 2018, 2019.

Registered	Tests	First-time pass	vs model (74.5%)
2016	431	72.2%	-2.3 pp
2017	456	83.3%	+8.8 pp
2018	136	66.2%	-8.3 pp
2019	87	59.8%	-14.7 pp
2020	79	73.4%	-1.1 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 · 2019–2025

Questions

Which Cadwell years have the lowest MOT pass rate?: 2016, 2018, 2019 registered examples pass first time less often than the Ajs Cadwell overall (74.5%); the 2019 cohort is lowest at 59.8% from 87 tests.
Which Cadwell year has the highest MOT pass rate?: 2017, at 83.3% of 456 first tests (2005–2025).
How much does the Cadwell pass rate vary by year?: 23.5 percentage points between the highest (2017, 83.3%) and lowest (2019, 59.8%) 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: Ajs Cadwell reliability, failures and mileage · ranked #4355 of 5428 models· other Ajs models: Modena, Modena 125, DD, Firefox, DD 125 E 08, 16MS