Di Blasi Di-Blasi: MOT pass rate by registration year

Which Di-Blasi years pass first time, and which fall short of the model's 91.6% average, from 610 DVSA tests.

2003

highest-passing year · 97.3%

2002

lowest-passing year · 83.8%

13.5pp

spread across 4 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: 2003 (97.3% of 111 tests). Lowest: 2002 (83.8% of 74). Years more than two points below the model average: 2002.

Registered	Tests	First-time pass	vs model (91.6%)
2000	81	93.8%	+2.2 pp
2002	74	83.8%	-7.8 pp
2003	111	97.3%	+5.7 pp
2004	73	93.2%	+1.6 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

first-time pass rate by test year · 2006–2016

Questions

Which Di-Blasi years have the lowest MOT pass rate?: 2002 registered examples pass first time less often than the Di Blasi Di-Blasi overall (91.6%); the 2002 cohort is lowest at 83.8% from 74 tests.
Which Di-Blasi year has the highest MOT pass rate?: 2003, at 97.3% of 111 first tests (2005–2025). Years more than two points above the model average: 2000, 2003.
How much does the Di-Blasi pass rate vary by year?: 13.5 percentage points between the highest (2003, 97.3%) and lowest (2002, 83.8%) 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: Di Blasi Di-Blasi reliability, failures and mileage · ranked #546 of 5428 models