Kia Stonic: common problems, best years and what to check
Rio-based small SUV with a seven-year warranty. Covers 2017–2024 cars: every popular engine, its known faults with typical UK repair costs, and how each year has held up on Britain's roads.
Updated November 2026 · By the Carnod team · How we build this guide
Is the Kia Stonic a good used buy?
Best buy
1.0 T-GDi 120 mild hybrid
Avoid
none notable
Who it suits: Buyers wanting a cheap, reliable small SUV with warranty.
What's good
- Seven-year warranty
- Reliable
- Good value
- Well equipped
What's not
- Basically a raised Rio
- Small boot
- Average ride
- Plain interior
By the numbers
- #141 most common model on UK roads, with about 47k licensed (DfT).
- The biggest surviving year is 2019: 8.0k cars still licensed.
Kia Stonic common problems by generation and engine
Kia Stonic Stonic (2017–) · small SUV
How to spot it: 17 plate onwards. Two-tone roof options; 2021 facelift with LED lights.
1.0 T-GDi / mild hybrid (Kappa, petrol, 2017–)
Reliable
Costs are typical UK independent-garage prices including parts and labour. Main dealers usually charge more.
Best and worst Kia Stonic years
How many Kia Stonics from each year are still licensed today (DfT), coloured by how well that year survives compared with similar cars of the same age.
No year clearly outlasts similar cars. No year falls off the road noticeably faster than similar cars.
Kia Stonic MOT pass rate and common failures
First-time pass rate (2025)
Average UK car of the same age
MOT tests analysed (2017+ cars)
Kia Stonics pass their MOT first time 3 points more often than the average UK car of the same age (88% vs 85%). Older cars fail more, so we compare like with like.
| First registered | Pass rate | Average UK car that age | Median mileage |
|---|---|---|---|
| 2017 | 84% | 78% | 52k miles |
| 2018 | 85% | 81% | 47k miles |
| 2019 | 86% | 84% | 38k miles |
| 2020 | 88% | 86% | 29k miles |
| 2021 | 89% | 87% | 26k miles |
| 2022 | 91% | 89% | 21k miles |
Pass rate by fuel
Petrol
Hybrid
Diesel
Fuels differ in age and mileage mix, so treat this as a pattern rather than a like-for-like comparison.
Most common MOT failures
- Wipers: does not clear the windscreen effectively2.98 per 100
- Brake pads: less than 1.5 mm thick2.66 per 100
- Tread depth below requirements of 1.6mm1.49 per 100
- Tyres: has a cut0.99 per 100
- Headlamp aim: too low0.78 per 100
- Headlamp: not working on dipped beam0.71 per 100
- Ball joint dust cover no longer prevents the ingress of dirt0.71 per 100
- Washers: provides insufficient washer liquid0.68 per 100
Most common advisories
- Tread depth below requirements of 1.6mm17.87 per 100
- Brake pads: less than 1.5 mm thick13.2 per 100
- Tyres: has a tear8.81 per 100
- Brake discs: in such a condition that it is seriously weakened8.06 per 100
- Brake discs: significantly and obviously worn4.41 per 100
- Non-component advisories: Child Seat fitted not allowing full inspection of adult belt2.92 per 100
- Non-component advisories: Nail in tyre2.5 per 100
- Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm2.26 per 100
Source: DVSA anonymised MOT results for 2025 (normal car tests). First-time pass counts faults fixed during the test as fails. Contains public sector information licensed under the Open Government Licence v3.0.
Does the Kia Stonic have a timing belt or chain?
| Engine | Type | When | Cost |
|---|---|---|---|
| 1.0 T-GDi | chain | durable | £500–£900 |
Kia Stonic running costs
Road tax (from April 2017)
Insurance groups
Real-world economy
Servicing (independent)
Tyres
Warranty when new
Is the Kia Stonic ULEZ compliant?
- Petrol and hybrid: compliant if Euro 4 — nearly all petrol cars from 2006, many from 2001.
- Same standards apply in Birmingham and Bristol Clean Air Zones (which charge private cars) and Scotland's LEZs in Glasgow, Edinburgh, Aberdeen and Dundee (which fine them). Check the exact car on TfL's vehicle checker.
Safety and practicality
Euro NCAP
Boot
Seats
Kia Stonic vs rivals
| Model | On UK roads | Insurance | Boot | Best buy |
|---|---|---|---|---|
| Kia Stonic | 47k | 10–15 | 352 l | 1.0 T-GDi 120 mild hybrid |
| Volkswagen T-Cross | 48k | 9–16 | 455 l | 1.0 TSI 110 |
| Ford Puma | 180k | 11–21 | 456 l | 2020+ 1.0 EcoBoost mHEV 125 manual |
| SEAT Arona | 75k | 8–17 | 400 l | 1.0 TSI 110 manual |
| Skoda Kamiq | 44k | 9–17 | 400 l | 1.0 TSI 110 manual |
| Hyundai Bayon | — | — | — | Guide coming soon |
What to check when buying a used Kia Stonic
- Warranty transfers
Kia Stonic FAQ
›Is the Kia Stonic reliable?
Generally, if you pick the right version. Best buy: 1.0 T-GDi 120 mild hybrid. Avoid: none notable.
›What is the Kia Stonic MOT pass rate?
88% of Kia Stonics passed their MOT first time in 2025 (29,112 tests), better than the 85% average for cars of the same age. The most common failure: wipers: does not clear the windscreen effectively.
›What are the most common Kia Stonic problems?
The costliest known faults are . Each one is listed by engine with typical UK repair costs above.
›Does the Kia Stonic have a timing belt or chain?
1.0 T-GDi: chain.
›What is the best year Kia Stonic to buy?
By DfT survival data, 2018, 2020, 2021 cars have outlasted comparable cars best. Condition and history still matter more than the year.
›How much does a Kia Stonic cost to run?
Real-world economy: 1.0 T-GDi 44–50 mpg. Insurance groups 10–15. A minor service is about £130–£190 at an independent garage.
›How much is road tax on a Kia Stonic?
Cars registered from April 2017 pay £200 a year (more if the list price was over £40k). Older cars pay by CO2 band, from £20 to £790.
›Is the Kia Stonic ULEZ compliant?
Petrol and hybrid: compliant if Euro 4 — nearly all petrol cars from 2006, many from 2001.
How we build this guide
We combine official UK data with what independent garages see most often on this model.
- How many are still on the road: DfT vehicle licensing statistics, by year first used. The survival comparison is against cars of the same age.
- MOT pass rates, failures and mileage: DVSA anonymised MOT results — every normal car MOT in Great Britain for the year, compared with all cars of the same age.
- Road tax: GOV.UK rates from April 2026. ULEZ: TfL and Clean Air Zone emission standards.
- Faults and repair costs: known problems by engine code, priced at typical UK independent-garage rates including parts and labour.
- Insurance groups, mpg, servicing and tyres: typical ranges, not quotes. Your car's exact figures depend on the version and where you live.
This is a buying guide, not a mechanical inspection. A specific car's MOT history tells you far more than any model average — run a free check on it before you go and see it.
Sources: licensed counts and survival from DfT vehicle licensing statistics; road tax from GOV.UK (April 2026 rates). Faults, costs, mpg and insurance groups are typical ranges, not quotes. A guide, not a mechanical inspection.