Kia Rio years to avoid: 2007, 2008, 2011

Last updated · OBDCode UK editorial

Inspect most carefully: 2007, 2008, 2011. Strongest in the data: 2017 or 2018. The ranking uses 283,935 MOT test records across 17 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 6.0-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 Rio 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 2017 Strong 102.3 +2.3 pts 86.3% 23,889
2 2018 Strong 102.3 +2.3 pts 88.7% 16,876
3 2015 102.0 +2.0 pts 80.7% 33,641
4 2021 101.9 +1.9 pts 92.3% 4,276
5 2022 101.8 +1.8 pts 93.1% 3,010
6 2016 101.4 +1.4 pts 82.8% 26,134
7 2020 101.1 +1.1 pts 91.1% 9,279
8 2019 100.9 +0.9 pts 89.3% 14,312
9 2014 97.4 -2.6 pts 73.2% 32,520
10 2009 96.6 -3.4 pts 63.0% 13,989
11 2013 95.5 -4.5 pts 68.8% 29,323
12 2012 95.5 -4.5 pts 66.7% 26,550
13 2010 95.5 -4.5 pts 62.9% 17,807
14 2006 95.5 -4.5 pts 60.0% 2,757
15 2007 Inspect 94.6 -5.4 pts 59.7% 3,469
16 2008 Inspect 94.2 -5.8 pts 59.3% 5,925
17 2011 Inspect 93.7 -6.3 pts 62.9% 20,178

Why 2007 and 2008 and 2011 rank lower

The 2007 cohort passes 59.7% of tests (-5.4 points versus same-age cars) at a median 88,383 miles, with brakes the leading failure system. The 2008 cohort passes 59.3% of tests (-5.8 points versus same-age cars) at a median 87,319 miles, with suspension the leading failure system. The 2011 cohort passes 62.9% of tests (-6.3 points versus same-age cars) at a median 78,526 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.

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 2007 example beats a neglected 2017 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 (6.0 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 Rio years should I avoid?

Based on 283,935 MOT tests adjusted against cars of the same age, 2007, 2008, 2011 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 Rio year to buy used?

2017 and 2018 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 Rio reliable overall?

Across 283,935 tests, the median age-adjusted index is 97.4 (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.