Kia Stonic

Reliability, estimated running costs, and MOT data across 5 model years from 31,430 MOT tests in 2024.

Avg Pass Rate

92%

Total Tests

31,430

Highest Pass Rate

2021 (97%)

Years Covered

About the Kia Stonic

The Kia Stonic was MOT tested 31,430 times in 2024 (DVSA data, retests included) across 5 model years (2017 to 2021), with an average pass rate of 92%. That's comfortably above the average of 82% across all models in our data. Our records list diesel and petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2021 model has the highest pass rate at 97% from 250 tests. The 2017 model has the lowest at 89%. The 8 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer Kia Stonics pass their MOT more often than older ones, by 5 percentage points on average, which is mostly down to age and wear.

Mileage Across Years

The oldest model in our data (2017) averages 45,840 miles, while the newest (2021) averages 18,874 miles.

Compared to the Kia brand average of 86%, the Stonic performs 6 points better, making it one of the more reliable options in the Kia range.

Estimated Running Costs

Fuel (Petrol, 998cc)

£1,175

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£1,630

Per month£136/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2021 details

How reliable is the Kia Stonic?

vs average of all models+10% (82% avg)

vs Kia brand average+6% (86% avg)

Best to worst year spread8 percentage points

Reliability trendImproving over years

Kia Stonic by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2021	97%	250	18,874 mi
2020	94%	6,053	24,242 mi
2019	91%	12,612	33,494 mi
2018	90%	11,258	42,938 mi
2017	89%	1,257	45,840 mi

Questions about the Kia Stonic

Is the Kia Stonic reliable?

Across its 5 model years in our data (2017 to 2021), the Kia Stonic averages a 92% MOT pass rate, from 31,430 tests (DVSA MOT data for tests in 2024, retests included). That's 10 points above the average of 82% across all models in the same data. The 2021 model has the highest pass rate of the years with at least 100 tests, at 97%.

Which year Kia Stonic has the best MOT pass rate?

Of the years with at least 100 tests, the 2021 Kia Stonic has the highest MOT pass rate at 97%, while the 2017 model has the lowest at 89%, a 8 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.