Mash XY: MOT pass rate by registration year

Which XY years pass first time, and which fall short of the model's 86.4% average, from 653 DVSA tests.

2015

highest-passing year · 86.8%

2016

lowest-passing year · 85.3%

1.5pp

spread across 3 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: 2015 (86.8% of 219 tests). Lowest: 2016 (85.3% of 225).

Registered	Tests	First-time pass	vs model (86.4%)
2015	219	86.8%	+0.4 pp
2016	225	85.3%	-1.1 pp
2017	143	86.7%	+0.3 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 · 2018–2025

Questions

Which XY years have the lowest MOT pass rate?: none: no registration year of the Mash XY falls more than two points under the model's 86.4% overall pass rate.
Which XY year has the highest MOT pass rate?: 2015, at 86.8% of 219 first tests (2005–2025).
How much does the XY pass rate vary by year?: 1.5 percentage points between the highest (2015, 86.8%) and lowest (2016, 85.3%) 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: Mash XY reliability, failures and mileage · ranked #2091 of 5428 models· other Mash models: Fifty, Black 7, XY 400-2, Fifty 50, Black Seven 125