Kia Stonic (2020)

Estimated running costs and MOT pass rates from 6,053 MOT tests in 2024.

Annual Cost

£1,630

£136/month

MOT Pass Rate

94%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 1-8

998cc Petrol

Great Choice

94% pass rate, £1,630/year to run. 12 points above average.

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Petrol998cc6 years old6,053 tests24k miles avg

Annual Running Costs

Fuel (Petrol, 998cc)

~50 mpg

£1,175

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,630

Per month£136/mo

Per week£31/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

94% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 12 points above the average of 82% across all models in our data. It also outperforms the Kia brand average of 86%.

94% of MOT tests on Kia Stonics from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 6,053 tests across the UK, retests included. The average mileage recorded at those tests was 24,242 miles.

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How Does It Compare?

Rank among 2020 models632nd of 2,554(top 25%)

Rank among Kia models82nd of 471(top 18%)

vs average of all models+12%(82% avg)

vs 2020 models average+2%(92% avg)

vs Kia average+8%(86% avg)

Mileage Analysis

24,242

Average miles

29,600

Expected for age

The average 2020 Kia Stonic had 24,242 miles on the clock at its 2024 MOT, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.

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Best Year to Buy?

Of the years with at least 100 tests, the 2021 model has the highest MOT pass rate at 97%, while the 2017 model has the lowest at 89%. The 2020 scores 94%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Kia Stonic by Year

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

Similar Cars to Consider

Ford Fiesta

2018 · 998cc Petrol

£1,630/year

90%

-4%

Volkswagen Golf

2019 · 1498cc Petrol

£1,853/year

92%

-2%

Vauxhall Corsa

2018 · 1398cc Petrol

£2,003/year

85%

-9%

Nissan Qashqai

2018 · 1200cc Petrol

£1,780/year

87%

-7%

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About the 2020 Kia Stonic

The 2020 Kia Stonic is a city car. Our records list a 998cc petrol engine, though engines vary between versions. 6,053 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. It ranks in the top 25% of all 2020 models for MOT pass rate.

With an average of 24,242 miles recorded at its 2024 MOT tests, Kia Stonic owners drive about as much as the UK average.

2020 Kia Stonic Fuel Costs

The modest 998cc petrol engine keeps fuel costs low, which is a real advantage for a city car. Expect around 50 mpg in mixed driving, which works out to roughly £1,175 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 2020 Kia Stonic?

Total estimated annual running cost is £1,630 (£136/month), broken down as £1,175 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Kia Stonic 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.

Buying a Used 2020 Kia Stonic

At 6 years old, the Kia Stonic offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2021 model has the highest pass rate at 97%. With 6,053 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Coil Pack Failure

Medium risk

Smaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2020 Kia Stonic stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Kia Stonic(2020)	94%	£1,175	£200	Grp 1-8	£1,630
Ford Fiesta(2018)	90%	£1,175	£200	Grp 1-8	£1,630same
Volkswagen Golf(2019)	92%	£1,398	£200	Grp 12-25	£1,853+£223
Vauxhall Corsa(2018)	85%	£1,398	£200	Grp 8-20	£2,003+£373
Nissan Qashqai(2018)	87%	£1,175	£200	Grp 5-15	£1,780+£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2020 Kia Stonic

Is the 2020 Kia Stonic reliable?

Excellent reliability. Very few MOT failures. 94% of MOT tests on 2020 Kia Stonics ended in a pass, from 6,053 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points above the average of 82% across all models in the same data.

How much does a 2020 Kia Stonic cost to run?

Our estimate is £1,630 a year (£136 a month): £1,175 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2020 Kia Stonic?

94% of 6,053 MOT tests on the 2020 Kia Stonic ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 632nd of 2,554 models first registered in 2020 (top 25%).

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% and the 2017 the lowest at 89%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2020 Kia Stonic?

The average mileage recorded at MOT tests on the 2020 Kia Stonic is 24,242 miles, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.