Daelim GZ 50: MOT pass rate by registration year

Which GZ 50 years pass first time, and which fall short of the model's 71.2% average, from 593 DVSA tests.

2004

highest-passing year · 75.8%

2000

lowest-passing year · 67.6%

8.2pp

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: 2004 (75.8% of 124 tests). Lowest: 2000 (67.6% of 71). Years more than two points below the model average: 2000, 2001, 2002.

Registered	Tests	First-time pass	vs model (71.2%)
2000	71	67.6%	-3.6 pp
2001	55	69.1%	-2.1 pp
2002	94	68.1%	-3.1 pp
2003	154	73.4%	+2.2 pp
2004	124	75.8%	+4.6 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 · 2006–2014

Questions

Which GZ 50 years have the lowest MOT pass rate?: 2000, 2001, 2002 registered examples pass first time less often than the Daelim GZ 50 overall (71.2%); the 2000 cohort is lowest at 67.6% from 71 tests.
Which GZ 50 year has the highest MOT pass rate?: 2004, at 75.8% of 124 first tests (2005–2025). Years more than two points above the model average: 2003, 2004.
How much does the GZ 50 pass rate vary by year?: 8.2 percentage points between the highest (2004, 75.8%) and lowest (2000, 67.6%) 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: Daelim GZ 50 reliability, failures and mileage · ranked #4640 of 5428 models· other Daelim models: Daystar, VS 125, S Five, Vee 125, NS125, VL