Kia
1,305 MOT tests analysed. sits above the UK fleet average — here's where Stonic Connect Mhevs pass, fail, and end up on the retest sheet.
That's 16.1 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
93.6%
Pass-after-fix
2.1%
Fail
4.1%
Avg miles
20,970
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 · 1,305 tests
Pass rate climbs 3.0 points across the cohorts — newer Stonic Connect Mhev examples clear the test more reliably than the early cars.
Pass
91.0%
Fail
6.8%
PRS
2.3%
Avg mileage at test
26,776 mi
Pass
93.9%
Fail
3.8%
PRS
2.0%
Avg mileage at test
20,310 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 1,305 MOT tests, the Stonic Connect Mhev returns 93.6% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. A worn steering ball joint and wipers that don't clear the screen round out the top three. Average tested mileage sits at 20,970, 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.
Filter failures:
Hide categories
Tick a category to hide it from rankings sitewide. Saved in this browser only.
Tyre tread depth not in accordance with the requirements
14 occurrences · 1.1% of tests
A steering ball joint with excessive wear or free play
14 occurrences · 1.1% of tests
Wiper blade missing or obviously not clearing the windscreen
10 occurrences · 0.8% of tests
Wiper blade defective
9 occurrences · 0.7% of tests
A tyre seriously damaged
6 occurrences · 0.5% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
6 occurrences · 0.5% of tests
a brake lining or pad worn below 1.5mm
5 occurrences · 0.4% of tests
Engine MIL illuminated indicating a malfunction
2 occurrences · 0.2% of tests
A tyre seriously damaged
2 occurrences · 0.2% of tests
Significant brake effort recorded with no brake applied indicating a binding brake
2 occurrences · 0.2% 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 4 failures
£180–£425
If every one of this Stonic Connect Mhev'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 →
Try the calculator
Build your own retest budget.
Year-band analysis
First-time MOT pass rate split by registration band. A 3.0-point gap between bands is modest — the year you buy Kia Stonic Connect Mhev makes a small but real difference to MOT outcomes.
Best band to buy
93.9%
2021+ registration
the 2021-on band climbs to 93.9% — a 3.0-point improvement. Tests in this band average 20,310 miles — roughly 6K miles fewer on the clock than the older band. Failures here are mostly wear items: tread depth below requirements of 1.6mm, ball joint has excessive play — the structural issues that drag down older examples don't appear in the top-10 for this band. Post-2020 examples are early in their MOT life and generally show the cleanest records.
Band to be cautious about
91.0%
2018–2020 registration
On the 2018–2020 band, the data shows a 91.0% pass rate against a fleet average of 93.9% on the newer band. The main culprits logged at test: ball joint has excessive play, does not clear the windscreen effectively, and damaged but not adversely affecting driver's view. Average mileage on test for this band is 26,776 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (93.9% first-time pass). Worst band to avoid: 2018-2020 (91.0% pass). That's a 3.0-point spread across 133 older tests and 1,172 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
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
Item 02 · 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
My Motor World · affiliate
Affiliate links — small commission, no extra cost to you.
Hycote
Hycote Touch Up Colour Paint Brush Kia Titanium Silver Metallic 12.5ml
£6.59
View at My Motor World →
Hycote
Hycote Touch Up Colour Paint Brush Kia White 12.5ml
£6.59
View at My Motor World →
Hycote
Hycote Kia Clear White Double Acrylic Spray Paint 150ml
£6.59
View at My Motor World →
Hycote
Hycote Kia Titanium Silver Metallic Double Acrylic Spray Paint 150ml
£6.59
View at My Motor World →
Click Mechanic · affiliate
Affiliate links — small commission, no extra cost to you.
Mobile mechanic · UK-wide
Book a mechanic at your door.
Fixed-price quotes upfront. No garage needed. Click Mechanic sends a vetted local mechanic to you — home, work, or roadside.
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 Connect Mhev 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.
