Vauxhall Insignia years to avoid — 588,932 MOT tests ranked

Inspect most carefully: 2014, 2015, 2016. Strongest in the data: 2010 or 2011. The ranking uses 588,932 MOT tests across 12 registration years (2023–2025) and compares each year with all UK cars of the same age. Fuel-type signal: diesels show an average 3.1-point pass-rate deficit on this model. That may reflect mileage and use as well as the car itself, so inspect DPF and emissions history rather than treating fuel type as a verdict.

Every Insignia year, ranked

The age-adjusted MOT index sets 100 as the pass rate of all UK cars registered in the same year and tested in the same calendar year. Higher is better. This prevents an old car being labelled a “bad year” simply because it is old.

RankYearIndexVs same-agePass rateTests
1 2011 Strong 101.4 +1.4 pts 70.7% 65,919
2 2010 Strong 101.4 +1.4 pts 68.8% 39,441
3 2009 100.1 +0.1 pts 66.6% 27,619
4 2012 100.0 +0.0 pts 71.3% 58,708
5 2018 98.3 -1.7 pts 84.7% 37,736
6 2013 98.2 -1.8 pts 71.6% 60,965
7 2020 97.7 -2.3 pts 87.7% 3,486
8 2019 97.0 -3.0 pts 85.5% 23,741
9 2017 96.8 -3.2 pts 80.8% 46,061
10 2014 Inspect 94.6 -5.4 pts 70.5% 74,523
11 2015 Inspect 94.4 -5.6 pts 73.1% 84,609
12 2016 Inspect 93.0 -7.0 pts 74.4% 66,124

Why 2014 and 2015 and 2016 rank lower

The 2014 cohort passes 70.5% of tests (-5.4 points versus same-age cars) at a median 104,236 miles, with suspension the leading failure system. The 2015 cohort passes 73.1% of tests (-5.6 points versus same-age cars) at a median 93,773 miles, with suspension the leading failure system. The 2016 cohort passes 74.4% of tests (-7.0 points versus same-age cars) at a median 80,501 miles, with suspension the leading failure system. This is population-level evidence, not a known-fault list: service history, engine version and the individual MOT record can outweigh the registration-year average.

How to use this before buying

  • Rankings describe the cohort, not the car. A cherished 2014 example beats a neglected 2010 one — always run the specific reg through the free MOT history check.
  • Read the advisories. Repeated notes for the same component across years mean the owner has been ignoring it. Decode them in our advisory library.
  • Fuel matters on this model. The diesel deficit (3.1 points) usually traces to DPF and emissions kit on low-mileage use — check for P2463-type soot codes on the test drive.
  • Scan before you pay. A 2-minute OBD scan reveals stored faults the dashboard hides — see our scanner guide.

FAQs

Which Insignia years should I avoid?

Based on 588,932 MOT tests adjusted against cars of the same age, 2014, 2015, 2016 are the lower-scoring outliers. That is a prompt for closer inspection, not proof that every car from those years is bad.

What is the best Insignia year to buy used?

2010 and 2011 lead the age-adjusted MOT ranking. The score compares each registration year with all UK cars of the same age; the specific car's history and condition still take priority.

Is the Insignia reliable overall?

Across 588,932 tests, the median age-adjusted index is 98.0 (100 equals the pass rate of all cars registered in the same year). Use the spread between years as one signal, then check the individual registration.

Methodology: index = 100 + the model-year cohort’s MOT pass-rate difference versus all UK vehicles registered in the same year and tested in the same calendar year. Class 4 initial tests only; retests excluded; at least 1,500 tests per page. “Inspect” years are below both the same-age baseline and the model’s median index by at least 2 points. Association is not proof of a model-year defect. DVSA anonymised data 2023–2025, OGL v3.0.