TGB 304: MOT pass rate by registration year

Which 304 years pass first time, and which fall short of the model's 70.2% average, from 1,243 DVSA tests.

2009

highest-passing year · 73.5%

2004

lowest-passing year · 68.4%

5.1pp

spread across 8 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: 2009 (73.5% of 83 tests). Lowest: 2004 (68.4% of 133).

Registered	Tests	First-time pass	vs model (70.2%)
2003	157	70.1%	-0.1 pp
2004	133	68.4%	-1.8 pp
2005	86	69.8%	-0.4 pp
2006	90	70.0%	-0.2 pp
2007	126	73.0%	+2.8 pp
2008	400	69.3%	-0.9 pp
2009	83	73.5%	+3.3 pp
2010	90	71.1%	+0.9 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 · 2006–2017

Questions

Which 304 years have the lowest MOT pass rate?: none: no registration year of the TGB 304 falls more than two points under the model's 70.2% overall pass rate.
Which 304 year has the highest MOT pass rate?: 2009, at 73.5% of 83 first tests (2005–2025). Years more than two points above the model average: 2007, 2009.
How much does the 304 pass rate vary by year?: 5.1 percentage points between the highest (2009, 73.5%) and lowest (2004, 68.4%) 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: TGB 304 reliability, failures and mileage · ranked #4717 of 5428 models· other TGB models: 202, R50 X, 302, Delivery, 101R, BR8 R125X