Kia Stonic Connect MHEV (2020)

Estimated running costs and MOT pass rates from 133 MOT tests in 2024.

Annual Cost

£1,630

£136/month

MOT Pass Rate

93%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 1-8

998cc Hybrid

Great Choice

93% pass rate, £1,630/year to run. 11 points above average.

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Hybrid998cc6 years old133 tests27k miles avg

Annual Running Costs

Fuel (Hybrid, 998cc)

~50 mpg (petrol-engine estimate; hybrids usually use less)

£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

93% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 11 points above the average of 82% across all models in our data. It also outperforms the Kia brand average of 86%.

93% of MOT tests on Kia Stonic Connect MHEVs from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 133 tests across the UK, retests included. The average mileage recorded at those tests was 26,776 miles.

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How Does It Compare?

Rank among 2020 models1135th of 2,554(top half)

Rank among Kia models132nd of 471(top half)

vs average of all models+11%(82% avg)

vs 2020 models average+1%(92% avg)

vs Kia average+7%(86% avg)

Mileage Analysis

26,776

Average miles

29,600

Expected for age

The average 2020 Kia Stonic Connect MHEV had 26,776 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 96%, while the 2020 model has the lowest at 93%. Consider a different year if reliability is a priority. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Kia Stonic Connect MHEV by Year

Year	Pass Rate	Tests	Avg Mileage
2022	94%	51	21,234 mi
2021	96%	1,121	20,268 mi
2020	93%	133	26,776 mi

Similar Cars to Consider

Toyota Yaris

2018 · 1349cc Hybrid

£1,853/year

91%

-2%

Volvo XC40

2021 · 1470cc Hybrid

£1,853/year

93%

same

Toyota Yaris Design HEV CVT

2021 · 1490cc Hybrid

£1,853/year

96%

+3%

Honda Jazz Ex I-MMD CVT

2021 · 1498cc Hybrid

£1,853/year

96%

+3%

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About the 2020 Kia Stonic Connect MHEV

The 2020 Kia Stonic Connect MHEV is a city car. Our records list a 998cc hybrid engine, though engines vary between versions. 133 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. Among all models from 2020, the average MOT pass rate is 92%, and this model beats that benchmark.

With an average of 26,776 miles recorded at its 2024 MOT tests, Kia Stonic Connect MHEV owners drive about as much as the UK average.

2020 Kia Stonic Connect MHEV Fuel Costs

The modest 998cc hybrid engine keeps fuel costs low, which is a real advantage for a city car. Our estimate uses around 50 mpg, the figure for a petrol engine of this size, 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). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.

What does it cost to own a 2020 Kia Stonic Connect MHEV?

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 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2020 Kia Stonic Connect MHEV

At 6 years old, the Kia Stonic Connect MHEV offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.

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.

Hybrid Battery Health

Medium risk

After 6 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.

Inverter and Power Electronics

Low risk

The inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.

Regenerative Braking

Medium risk

Brake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.

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 Connect MHEV 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 Connect MHEV(2020)	93%	£1,175	£200	Grp 1-8	£1,630
Toyota Yaris(2018)	91%	£1,398	£200	Grp 8-20	£1,853+£223
Volvo XC40(2021)	93%	£1,398	£200	Grp 12-25	£1,853+£223
Toyota Yaris Design HEV CVT(2021)	96%	£1,398	£200	Grp 12-25	£1,853+£223
Honda Jazz Ex I-MMD CVT(2021)	96%	£1,398	£200	Grp 12-25	£1,853+£223

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 Connect MHEV

Is the 2020 Kia Stonic Connect MHEV reliable?

Excellent reliability. Very few MOT failures. 93% of MOT tests on 2020 Kia Stonic Connect MHEVs ended in a pass, from 133 tests (DVSA MOT data for tests in 2024, retests included). That's 11 points above the average of 82% across all models in the same data.

How much does a 2020 Kia Stonic Connect MHEV 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 Connect MHEV?

93% of 133 MOT tests on the 2020 Kia Stonic Connect MHEV ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1135th of 2,554 models first registered in 2020 (top half).

Which year Kia Stonic Connect MHEV has the best MOT pass rate?

Of the years with at least 100 tests, the 2021 Kia Stonic Connect MHEV has the highest MOT pass rate at 96% and the 2020 the lowest at 93%. 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 Connect MHEV?

The average mileage recorded at MOT tests on the 2020 Kia Stonic Connect MHEV is 26,776 miles, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.