Fiat Doblo years to avoid: 2017, 2020, 2021

Last updated · OBDCode UK editorial

Inspect most carefully: 2017, 2020, 2021. Strongest in the data: 2013. The ranking uses 123,434 MOT test records across 18 qualifying registration-year cohorts in the 2023–2025 DVSA test extracts and compares each cohort with all UK cars of the same age. Counts are test records, not unique vehicles. Same-vehicle follow-up for common certificate lines on this model is further down: how often the same item failed the next year, and how often the car was not tested again. Fuel-type signal: diesels show an average 8.3-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 Doblo 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 2013 Strong 103.4 +3.4 pts 76.8% 19,808
2 2009 101.2 +1.2 pts 67.6% 4,445
3 2008 99.6 -0.4 pts 64.8% 5,578
4 2010 98.4 -1.6 pts 65.8% 4,522
5 2006 97.4 -2.6 pts 61.8% 4,223
6 2007 96.6 -3.4 pts 61.7% 5,753
7 2011 94.8 -5.2 pts 64.0% 4,753
8 2012 92.9 -7.1 pts 64.2% 5,301
9 2005 92.6 -7.4 pts 57.1% 2,899
10 2014 92.4 -7.6 pts 68.3% 17,415
11 2015 91.6 -8.4 pts 70.4% 14,321
12 2004 91.5 -8.5 pts 55.8% 2,147
13 2018 90.5 -9.5 pts 76.8% 5,964
14 2016 89.6 -10.4 pts 71.0% 10,199
15 2019 88.8 -11.2 pts 77.2% 4,797
16 2020 Inspect 88.3 -11.7 pts 78.2% 2,250
17 2017 Inspect 87.9 -12.1 pts 71.9% 7,426
18 2021 Inspect 85.3 -14.7 pts 75.8% 1,633

Why 2017 and 2020 and 2021 rank lower

The 2020 cohort passes 78.2% of tests (-11.7 points versus same-age cars) at a median 31,352 miles, with suspension the leading failure system. The 2017 cohort passes 71.9% of tests (-12.1 points versus same-age cars) at a median 65,962 miles, with suspension the leading failure system. The 2021 cohort passes 75.8% of tests (-14.7 points versus same-age cars) at a median 49,260 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.

What happened next on this model

Year rankings are age-adjusted pass rates. The figures below are a same-vehicle follow-up for certificate lines that appear often enough on this model (at least 200 cars). They are not a repair quote and they do not isolate a turbo, DSG, or clutch part.

National rankings for the not-retested gap: cars not tested again. Repair-hold rates: repairs that did not hold.

How to use this before buying

  • Rankings describe the cohort, not the car. A cherished 2017 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.
  • Fuel matters on this model. The diesel deficit (8.3 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 Doblo years should I avoid?

Based on 123,434 MOT tests adjusted against cars of the same age, 2017, 2020, 2021 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 Doblo year to buy used?

2013 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 Doblo reliable overall?

Across 123,434 tests, the median age-adjusted index is 92.5 (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.

What data is required before a years-to-avoid guide is published?

We publish a guide only when a model has at least five registration-year cohorts old enough for a routine first MOT, each based on at least 1,500 Class 4 initial MOT tests pooled across the stated DVSA extract years, and at least 60,000 tests across those cohorts. From the models that pass those gates, this release includes the 220 models with the largest pooled samples. Retests are excluded.

How are the Strong and Inspect labels assigned?

Strong considers only the two highest-ranked registration-year cohorts and labels either one that is within 1.5 index points of the best. Inspect considers only the three lowest-ranked cohorts and labels a year only when its index is no higher than 100 and at least 2 points below the model median. Counts are MOT test records, not unique vehicles.

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. Pass rate uses DVSA result codes (P + PRS) ÷ (P + PRS + F): passes and passes after rectification at the test divided by those outcomes plus failures. Class 4 initial-test records only; retests excluded; at least 1,500 records per registration-year cohort. “Strong” considers the top two cohorts within 1.5 index points of the best. “Inspect” considers only the bottom three cohorts, then requires an index no higher than 100 and at least 2 points below the model median. Counts are test records, not unique vehicles. Association is not proof of a model-year defect. Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts. Contains public sector information licensed under the Open Government Licence v3.0.