Fiat Doblo years to avoid — 123,434 MOT tests ranked

Inspect most carefully: 2017, 2020, 2021. Strongest in the data: 2013. The ranking uses 123,434 MOT tests across 18 registration years (2023–2025) and compares each year with all UK cars of the same age. 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.

Rank	Year	Index	Vs same-age	Pass rate	Tests
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.

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.

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.