Kia
3,080 MOT tests analysed. sits above the UK fleet average — here's where Stonic 2s pass, fail, and end up on the retest sheet.
That's 12.8 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
90.3%
Pass-after-fix
2.4%
Fail
6.8%
Avg miles
23,287
Pass + Pass-after-fix + Fail = 100%
Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.
Performance by cohort
2 year bands · 3,080 tests
Pass rate is broadly flat across the cohorts — new and old Stonic 2 examples track each other at the test bay.
Pass
90.5%
Fail
6.5%
PRS
3.0%
Avg mileage at test
27,768 mi
Pass
90.3%
Fail
6.9%
PRS
2.3%
Avg mileage at test
22,867 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 3,080 MOT tests, the Stonic 2 returns 90.3% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a defective wiper blade. Brake pads worn below 1.5 mm and a seriously damaged tyre round out the top three. Average tested mileage sits at 23,287, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
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Wiper blade defective
41 occurrences · 1.3% of tests
a brake lining or pad worn below 1.5mm
37 occurrences · 1.2% of tests
A tyre seriously damaged
26 occurrences · 0.8% of tests
Wiper blade missing or obviously not clearing the windscreen
26 occurrences · 0.8% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
24 occurrences · 0.8% of tests
A steering ball joint with excessive wear or free play
20 occurrences · 0.6% of tests
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
13 occurrences · 0.4% of tests
A tyre seriously damaged
13 occurrences · 0.4% of tests
Tyre tread depth not in accordance with the requirements
9 occurrences · 0.3% of tests
A tyre cords visible or damaged
8 occurrences · 0.3% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 3 failures
£120–£250
If every one of this Stonic 2's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Build your own retest budget.
Year-band analysis
First-time MOT pass rate split by registration band. Pass rates barely move across bands here, so the year you buy Kia Stonic 2 makes little measurable difference to MOT outcomes.
Best band to buy
90.5%
2018–2020 registration
the 2018–2020 band climbs to 90.5% — a 0.2-point improvement. Failures here are mostly wear items: ball joint has excessive play, blade defective — the structural issues that drag down older examples don't appear in the top-10 for this band.
Band to be cautious about
90.3%
2021+ registration
On the 2021-on band, the data shows a 90.3% pass rate against a fleet average of 90.5% on the newer band. The main culprits logged at test: blade defective, less than 1.5 mm thick, and has a cut in excess of the…. Average mileage on test for this band is 22,867 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2018-2020 (90.5% first-time pass). Worst band to avoid: 2021+ (90.3% pass). That's a 0.2-point spread across 2,817 older tests and 263 newer ones — year of build makes a material difference on this model.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Item 01 · Amazon UK
Bosch Aerotwin wiper blades
Cheap wipers fail the test on smear streaks. Bosch Aerotwins last a winter and clear a screen properly.
Search Amazon UK
Item 02 · Amazon UK
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
Search Amazon UK
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Owner reports · Honest John
Verbatim faults logged by owners on honestjohn.co.uk over recent years. We didn't summarise — these are the words people typed in.
What's good
The ageing Kia Stonic has been treated to a second mid-life update, and it's a major one. We like how its interior and exterior styling have been brought into line with the rest of Kia's line-up, but the Stonic still lags behind cars like the Seat Arona and Ford Puma in terms of the way it drives and its practicality.
Report of PPF (petrol particulate filter) warning light on Kia Stonic 1.0 T-GDi. Reader has covered 12,000 miles in 22 months. Dealer says more long journeys required. [Google Pixel 10 Pro 256GB In Moonstone | Veri
Source: honestjohn.co.uk · 1 reports indexed
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Stonic 2 and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.
