BIKERELIABILITY Reg check
Registration-year report · 2005–2025

Data as of: DVSA MOT results to 2025

Ariel Arrow: MOT pass rate by registration year

Which Arrow years pass first time, and which fall short of the model's 93.7% average, from 1,615 DVSA tests.

1965
highest-passing year · 96.0%
1964
lowest-passing year · 90.4%
5.6pp
spread across 7 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: 1965 (96.0% of 149 tests). Lowest: 1964 (90.4% of 135). Years more than two points below the model average: 1964, 1971.

89%93%97%1960: 92.6% pass (350 tests)1961: 94.0% pass (449 tests)1962: 95.8% pass (192 tests)1963: 93.5% pass (168 tests)1964: 90.4% pass (135 tests)1965: 96.0% pass (149 tests)1971: 91.0% pass (78 tests)196019631971
RegisteredTestsFirst-time passvs model (93.7%)
1960 350 92.6% -1.1 pp
1961 449 94.0% +0.3 pp
1962 192 95.8% +2.1 pp
1963 168 93.5% -0.2 pp
1964 135 90.4% -3.3 pp
1965 149 96.0% +2.3 pp
1971 78 91.0% -2.7 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
87%93%99%2006: 97.2% pass (106 tests)2007: 88.8% pass (107 tests)2008: 90.8% pass (109 tests)2009: 92.0% pass (125 tests)2010: 95.5% pass (111 tests)2011: 90.6% pass (127 tests)2012: 93.3% pass (135 tests)2013: 95.1% pass (143 tests)2014: 95.8% pass (143 tests)2015: 95.9% pass (145 tests)2016: 93.4% pass (137 tests)2017: 94.9% pass (138 tests)2018: 93.9% pass (33 tests)20062018

Questions

Which Arrow years have the lowest MOT pass rate?
1964, 1971 registered examples pass first time less often than the Ariel Arrow overall (93.7%); the 1964 cohort is lowest at 90.4% from 135 tests.
Which Arrow year has the highest MOT pass rate?
1965, at 96.0% of 149 first tests (2005–2025). Years more than two points above the model average: 1962, 1965.
How much does the Arrow pass rate vary by year?
5.6 percentage points between the highest (1965, 96.0%) and lowest (1964, 90.4%) 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: Ariel Arrow reliability, failures and mileage · ranked #214 of 5428 models· other Ariel models: Red Hunter, Leader, Huntmaster, Square Four, NH, VH