Kia Stonic reliability, MPG and running costs
Figures updated
The Kia Stonic is a small suv. In 2024 MOT tests it scored 112 for reliability (100 is average), ranking 194 of 442, and 12.4% failed first time against a UK average of 28.5%. Its most common MOT failure is wipers (3.8% of tests).
Ranked 194 of 442 cars in the 2024 MOT Reliability League, and 8 of 27 small SUVs
In 2024, 24,198 Kia Stonics aged 3 to 20 had an MOT and 12.4% failed first time (UK average 28.5%). Taking age and mileage into account, the Kia Stonic is 11% less likely to fail than the average car of the same age and mileage. At the first MOT, at three years old, 8.6% failed (UK 12.7%).
First-time fail rate
12.4%
UK 28.5%
Fail rate at 3 years
8.6%
UK 12.7%
Average miles a year
7,300
Typical age at test: 5 years
Kia Stonic MOT failure rate by age
Most common Kia Stonic MOT faults
- Wipers: does not clear the windscreen effectively3.8% of tests
- Brake pads: less than 1.5 mm thick2.5% of tests
- Tread depth: tread depth below requirements of 1.6mm1.3% of tests
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords0.8% of tests
- Headlamp: not working on dipped beam0.6% of tests
- Washers: provides insufficient washer liquid0.5% of tests
What the Kia Stonic fails on
| Area | Tests failing | vs similar cars |
|---|---|---|
| Visibility | 4.8% | ▲ 1.5× as often |
| Brakes | 3.3% | ▲ 1.4× as often |
| Tyres | 2.8% | ▼ 43% less often |
| Lights and electrics | 2.0% | ▼ 36% less often |
| Exhaust and emissions | 0.5% | ▼ 33% less often |
| Suspension | 0.5% | ▼ 61% less often |
| Steering | 0.3% | ▼ 11% less often |
| Body and structure | 0.2% | ▼ 65% less often |
| Seat belts and airbags | 0.1% | ▼ 77% less often |
| Wheels | 0.1% | ▼ 61% less often |
What MPG does the Kia Stonic do?
Official economy for the Kia Stonic ranges from 44.8 to 70.6mpg across the 65 versions listed by the Vehicle Certification Agency (2018–2025). A typical petrol version manages 49.6mpg and a typical diesel 56.5mpg. Expect 10–15% less in real-world driving.
Work out a journey's fuel costHow much is road tax on a Kia Stonic?
Any Kia Stonic first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Kia Stonic registered between March 2001 and March 2017 is taxed on its CO2: £20 to £200 a year.
Work out tax for a specific carKia Stonic specs and running costs
Official figures for 65 versions sold in the UK between 2018 and 2025.
Fuel types
Diesel, Hybrid, Petrol
Official economy
44.8–70.6 mpg
CO2
106–142 g/km
Power
74–120 PS
| Version | Fuel | Economy | CO2 | Car tax | Company car tax |
|---|---|---|---|---|---|
| Stonic 'Shadow' 1.0 T-Gdi 98bhp MT 48V99 PS · MT · listed 2025 | Petrol | 50.4 mpg | 128g | £200 | 31% |
| Stonic 'Shadow' 1.0 T-GDi 98bhp DCT 48V99 PS · DCT · listed 2025 | Petrol | 49.6 mpg | 129g | £200 | 31% |
| Stonic '2' 1.0 T-GDi 98bhp MT99 PS · MT · listed 2025 | Petrol | 51.4 mpg | 125g | £200 | 31% |
| Stonic '2' 1.0 T-GDi 98bhp DCT99 PS · DCT · listed 2025 | Petrol | 50.4 mpg | 127g | £200 | 31% |
| Stonic 'GT-Line' 1.0 T-GDi 98bhp MT99 PS · MT · listed 2025 | Petrol | 48.7 mpg | 132g | £200 | 32% |
| Stonic 'GT-Line' 1.0 T-GDi 98bhp DCT99 PS · DCT · listed 2025 | Petrol | 47.1 mpg | 135g | £200 | 33% |
| Stonic '3' 1.0 T-GDi 98bhp MT 48V99 PS · MT · listed 2025 | Petrol | 50.4 mpg | 128g | £200 | 31% |
| Stonic '3' 1.0 T-GDi 98bhp DCT 48V99 PS · DCT · listed 2025 | Petrol | 49.6 mpg | 129g | £200 | 31% |
| Stonic 'GT-Line S' 1.0 T-GDi 98bhp MT 48V (Single-tone)99 PS · MT · listed 2025 | Petrol | 49.6 mpg | 128g | £200 | 31% |
| Stonic 'GT-Line S' 1.0 T-GDi 98bhp DCT 48V (Single-tone)99 PS · DCT · listed 2025 | Petrol | 49.6 mpg | 129g | £200 | 31% |
| Stonic Shadow 'Shadow' 1.0 T-Gdi 98bhp MT 48V100 PS · MT · listed 2025 | Petrol | 50.4 mpg | 128g | £200 | 31% |
| Stonic Shadow 'Shadow' 1.0 T-GDi 98bhp DCT 48V100 PS · DCT · listed 2025 | Petrol | 49.6 mpg | 129g | £200 | 31% |
| Stonic '2' 1.0 T-GDi 99bhp DCT74 PS · DCT7 · listed 2024 | Petrol | 51.4 mpg | 125g | £200 | 31% |
| Stonic '2' 1.0 T-GDi 99bhp MT74 PS · MT6 · listed 2024 | Petrol | 51.4 mpg | 125g | £200 | 31% |
| Stonic '2' 1.0 T-GDi 99bhp 6-speed Manual74 PS · MT6 · listed 2024 | Petrol | 51.4 mpg | 125g | £200 | 31% |
Economy and CO2 are official WLTP figures. Car tax is the yearly rate at current rates for a car first registered in the year listed, before any expensive car supplement. Company car tax is the 2026/27 benefit-in-kind rate. Showing the 15 most recent of 65 versions.
What a Kia Stonic costs to fuel
- petrol, typical official 49.6mpg…
- diesel, typical official 56.5mpg…
Official figures are usually 10–15% better than real-world driving.
Work out a journey in a Kia StonicBuying a used Kia Stonic?
Check the MOT history of the exact car: every result, advisory and mileage reading, free.
Compare the Kia Stonic with other small SUVs
Reliability, economy, car tax and running costs side by side.
Other Kia models
Frequently asked questions
›Is the Kia Stonic reliable?
Its MOT record is better than average: the Kia Stonic is 11% less likely to fail than the average car of the same age and mileage, with a reliability score of 112 in our 2024 league (100 is average).
›What are common problems with the Kia Stonic?
The most common MOT fault is “Wipers: does not clear the windscreen effectively”, found in 3.8% of tests. It fails on visibility and brakes more often than similar cars.
›What MPG does the Kia Stonic do?
Official economy for the Kia Stonic ranges from 44.8 to 70.6mpg across the 65 versions listed by the Vehicle Certification Agency (2018–2025). A typical petrol version manages 49.6mpg and a typical diesel 56.5mpg. Expect 10–15% less in real-world driving.
›How much is road tax on a Kia Stonic?
Any Kia Stonic first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). A Kia Stonic registered between March 2001 and March 2017 is taxed on its CO2: £20 to £200 a year.
›How many Kia Stonics fail their MOT?
12.4% of Kia Stonics aged 3 to 20 failed their MOT first time in 2024, and 8.6% failed at their first MOT.
Sources: DVSA anonymised MOT tests 2024, all versions of the Kia Stonic combined (Open Government Licence v3.0); official economy and CO2 from Vehicle Certification Agency data, © Crown copyright. VCA cannot accept liability for its accuracy. How we calculate the league.