Piaggio PX 150: MOT pass rate by registration year

Which PX 150 years pass first time, and which fall short of the model's 77.0% average, from 662 DVSA tests.

1979

highest-passing year · 85.2%

1982

lowest-passing year · 78.5%

6.7pp

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: 1979 (85.2% of 54 tests). Lowest: 1982 (78.5% of 79).

Registered	Tests	First-time pass	vs model (77.0%)
1979	54	85.2%	+8.2 pp
1982	79	78.5%	+1.5 pp
1983	55	80.0%	+3.0 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 · 2006–2018

Questions

Which PX 150 years have the lowest MOT pass rate?: none: no registration year of the Piaggio PX 150 falls more than two points under the model's 77.0% overall pass rate.
Which PX 150 year has the highest MOT pass rate?: 1979, at 85.2% of 54 first tests (2005–2025). Years more than two points above the model average: 1979, 1983.
How much does the PX 150 pass rate vary by year?: 6.7 percentage points between the highest (1979, 85.2%) and lowest (1982, 78.5%) 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: Piaggio PX 150 reliability, failures and mileage · ranked #4065 of 5428 models· other Piaggio models: Vespa, Zip, NRG, PX 125 (vespa), PX 200 E, ET2