Triumph Thunderbird 1600: MOT pass rate by registration year

Which Thunderbird 1600 years pass first time, and which fall short of the model's 89.6% average, from 4,547 DVSA tests.

2011

highest-passing year · 92.0%

2012

lowest-passing year · 87.6%

4.4pp

spread across 4 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: 2011 (92.0% of 1,071 tests). Lowest: 2012 (87.6% of 378).

Registered	Tests	First-time pass	vs model (89.6%)
2009	1,602	88.5%	-1.1 pp
2010	1,484	89.6%	+0.0 pp
2011	1,071	92.0%	+2.4 pp
2012	378	87.6%	-2.0 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 · 2012–2025

Questions

Which Thunderbird 1600 years have the lowest MOT pass rate?: none: no registration year of the Triumph Thunderbird 1600 falls more than two points under the model's 89.6% overall pass rate.
Which Thunderbird 1600 year has the highest MOT pass rate?: 2011, at 92.0% of 1,071 first tests (2005–2025).
How much does the Thunderbird 1600 pass rate vary by year?: 4.4 percentage points between the highest (2011, 92.0%) and lowest (2012, 87.6%) 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: Triumph Thunderbird 1600 reliability, failures and mileage · ranked #1077 of 5428 models· other Triumph models: Bonneville, Tiger, Sprint, Daytona, Speed Triple, Thunderbird