Citroen C1 years to avoid — 482,402 MOT tests ranked
Every C1 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.
| Rank | Year | Index | Vs same-age | Pass rate | Tests |
|---|---|---|---|---|---|
| 1 | 2014 Strong | 104.5 | +4.5 pts | 80.3% | 40,186 |
| 2 | 2013 Strong | 103.5 | +3.5 pts | 76.8% | 41,269 |
| 3 | 2015 | 103.4 | +3.4 pts | 82.1% | 53,029 |
| 4 | 2012 | 103.2 | +3.2 pts | 74.4% | 40,763 |
| 5 | 2018 | 102.5 | +2.5 pts | 88.9% | 21,190 |
| 6 | 2019 | 102.4 | +2.4 pts | 90.8% | 15,097 |
| 7 | 2016 | 102.0 | +2.0 pts | 83.3% | 53,688 |
| 8 | 2011 | 101.8 | +1.8 pts | 71.0% | 40,493 |
| 9 | 2017 | 101.8 | +1.8 pts | 85.8% | 26,954 |
| 10 | 2020 | 101.8 | +1.8 pts | 91.7% | 9,757 |
| 11 | 2010 | 101.7 | +1.7 pts | 69.0% | 38,421 |
| 12 | 2009 | 98.4 | -1.6 pts | 64.8% | 34,846 |
| 13 | 2007 | 96.9 | -3.1 pts | 62.1% | 21,375 |
| 14 | 2005 Inspect | 96.7 | -3.3 pts | 61.2% | 2,092 |
| 15 | 2008 Inspect | 96.4 | -3.6 pts | 61.6% | 29,720 |
| 16 | 2006 Inspect | 95.9 | -4.1 pts | 60.3% | 13,522 |
Why 2005 and 2006 and 2008 rank lower
The 2005 cohort passes 61.2% of tests (-3.3 points versus same-age cars) at a median 93,640 miles, with lamps, reflectors and electrical equipment the leading failure system. The 2008 cohort passes 61.6% of tests (-3.6 points versus same-age cars) at a median 87,058 miles, with brakes the leading failure system. The 2006 cohort passes 60.3% of tests (-4.1 points versus same-age cars) at a median 93,582 miles, with lamps, reflectors and electrical equipment 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 2005 example beats a neglected 2013 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.
- Scan before you pay. A 2-minute OBD scan reveals stored faults the dashboard hides — see our scanner guide.
FAQs
Which C1 years should I avoid?
Based on 482,402 MOT tests adjusted against cars of the same age, 2005, 2006, 2008 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 C1 year to buy used?
2013 and 2014 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 C1 reliable overall?
Across 482,402 tests, the median age-adjusted index is 101.8 (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.