Generic Trigger SM 50: MOT pass rate by registration year

Which Trigger SM 50 years pass first time, and which fall short of the model's 52.6% average, from 620 DVSA tests.

2008

highest-passing year · 56.7%

2012

lowest-passing year · 46.0%

10.7pp

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: 2008 (56.7% of 141 tests). Lowest: 2012 (46.0% of 50). Years more than two points below the model average: 2009, 2012.

Registered	Tests	First-time pass	vs model (52.6%)
2008	141	56.7%	+4.1 pp
2009	139	48.2%	-4.4 pp
2010	123	54.5%	+1.9 pp
2011	121	55.4%	+2.8 pp
2012	50	46.0%	-6.6 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 · 2011–2017

Questions

Which Trigger SM 50 years have the lowest MOT pass rate?: 2009, 2012 registered examples pass first time less often than the Generic Trigger SM 50 overall (52.6%); the 2012 cohort is lowest at 46.0% from 50 tests.
Which Trigger SM 50 year has the highest MOT pass rate?: 2008, at 56.7% of 141 first tests (2005–2025). Years more than two points above the model average: 2008, 2011.
How much does the Trigger SM 50 pass rate vary by year?: 10.7 percentage points between the highest (2008, 56.7%) and lowest (2012, 46.0%) 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: Generic Trigger SM 50 reliability, failures and mileage · ranked #5368 of 5428 models· other Generic models: Code, Cracker, Xor, Worx 125, Race 50, Trigger