BMW 1 Series years to avoid — 236,834 MOT tests ranked

No clear negative outlier after correcting for age. Strongest in the data: 2014 or 2015. The ranking uses 236,834 MOT tests across 15 registration years (2023–2025) and compares each year with all UK cars of the same age. Fuel-type signal: diesels show an average 4.3-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 1 Series 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 2014 Strong 109.9 +9.9 pts 85.7% 5,761
2 2015 Strong 109.7 +9.7 pts 88.4% 4,484
3 2016 108.2 +8.2 pts 89.5% 8,158
4 2008 108.0 +8.0 pts 73.1% 4,080
5 2011 107.7 +7.7 pts 76.9% 7,271
6 2006 107.6 +7.6 pts 72.0% 1,800
7 2010 106.3 +6.3 pts 73.7% 6,256
8 2007 106.2 +6.2 pts 71.3% 2,786
9 2005 106.2 +6.2 pts 70.7% 1,751
10 2009 105.4 +5.4 pts 71.8% 5,418
11 2017 105.0 +5.0 pts 89.0% 22,079
12 2013 104.0 +4.0 pts 77.4% 46,097
13 2012 103.5 +3.5 pts 74.7% 39,645
14 2018 102.8 +2.8 pts 89.2% 36,184
15 2019 100.4 +0.4 pts 88.8% 45,064

How to use this before buying

  • Rankings describe the cohort, not the car. A cherished older example beats a neglected 2014 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 (4.3 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 1 Series years should I avoid?

No year is a clear negative outlier after correcting for age, so buy on condition and history rather than year.

What is the best 1 Series year to buy used?

2014 and 2015 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 1 Series reliable overall?

Across 236,834 tests, the median age-adjusted index is 106.2 (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.