SEAT Mii EV (2020)

Estimated running costs and MOT pass rates from 425 MOT tests in 2024.

Annual Cost

£1,010

£84/month

MOT Pass Rate

92%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

n/a

Electric

Great Choice

92% pass rate, £1,010/year to run. 10 points above average.

Buying this car? Check for finance, write-offs & theft

£4.99

Check a specific SEAT Mii EV

Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.

Electric6 years old425 tests19k miles avg

Annual Running Costs

Electricity

Home charging at about 7.5p a mile

£555

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,010

Per month£84/mo

Per week£19/wk

Estimates based on 7,400 miles/year (UK average), home charging at about 7.5p a mile, 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

92% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 10 points above the average of 82% across all models in our data. It also outperforms the SEAT brand average of 85%.

92% of MOT tests on SEAT Mii EVs from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 425 tests across the UK, retests included. The average mileage recorded at those tests was 19,385 miles.

Got a SEAT Mii EV you're looking at?

Enter the reg plate to check its specific MOT history, mileage, and health score.

How Does It Compare?

Rank among 2020 models1340th of 2,554(bottom half)

Rank among SEAT models91st of 310(top half)

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

vs 2020 models average+0%(92% avg)

vs SEAT average+7%(85% avg)

Mileage Analysis

19,385

Average miles

29,600

Expected for age

The average 2020 SEAT Mii EV had 19,385 miles on the clock at its 2024 MOT, which is below the expected 29,600 miles for a 4-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Looking at a specific SEAT Mii EV?

Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.

SEAT Mii EV by Year

Year	Pass Rate	Tests	Avg Mileage
2021	90%	1,728	19,006 mi
2020	92%	425	19,385 mi

Similar Cars to Consider

Tesla Model 3 Long Range Awd

2021 · Electric

£1,160/year

88%

-4%

Jaguar I-Pace

2020 · Electric

£1,010/year

96%

+4%

Tesla Model 3 Standard Range +

2021 · Electric

£1,160/year

88%

-4%

Nissan Leaf

2021 · Electric

£1,010/year

94%

+2%

Check a Specific SEAT Mii EV

Enter a reg plate to get the full MOT history, health score, and mileage verification.

Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.

About the 2020 SEAT Mii EV

The 2020 SEAT Mii EV is an electric car. Our records list it as electric. 425 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. Among all models from 2020, the average MOT pass rate is 92%, and this model matches that benchmark.

With an average of 19,385 miles recorded at its 2024 MOT tests, SEAT Mii EV owners tend to use this car less than the typical driver.

What does it cost to own a 2020 SEAT Mii EV?

Total estimated annual running cost is £1,010 (£84/month), broken down as £555 electricity, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2020 SEAT Mii EV

At 6 years old, the SEAT Mii EV 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.

Battery Degradation

Watch out

After 6 years, expect some battery capacity loss. Check the battery health report for state of health (SoH). Below 80% significantly reduces range.

Charging Port

Medium risk

Charging connectors and ports can develop issues from regular use. Check both AC and DC charging work correctly before purchasing.

Software Updates

Medium risk

Older EVs may miss out on manufacturer software updates that improve range and features. Check the infotainment system is up to date.

12V Auxiliary Battery

Medium risk

EVs still have a standard 12V battery for accessories. These drain faster than in petrol cars and can leave you stranded if flat. Replacement is £100-£200.

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 SEAT Mii EV 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
SEAT Mii EV(2020)	92%	£555	£200	n/a	£1,010
Tesla Model 3 Long Range Awd(2021)	88%	£555	£200	n/a	£1,160+£150
Jaguar I-Pace(2020)	96%	£555	£200	n/a	£1,010same
Tesla Model 3 Standard Range +(2021)	88%	£555	£200	n/a	£1,160+£150
Nissan Leaf(2021)	94%	£555	£200	n/a	£1,010same

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 SEAT Mii EV

Is the 2020 SEAT Mii EV reliable?

Excellent reliability. Very few MOT failures. 92% of MOT tests on 2020 SEAT Mii EVs ended in a pass, from 425 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.

How much does a 2020 SEAT Mii EV cost to run?

Our estimate is £1,010 a year (£84 a month): £555 electricity, £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 SEAT Mii EV?

92% of 425 MOT tests on the 2020 SEAT Mii EV ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1340th of 2,554 models first registered in 2020 (bottom half).

Which year SEAT Mii EV has the best MOT pass rate?

Of the years with at least 100 tests, the 2020 SEAT Mii EV has the highest MOT pass rate at 92% and the 2021 the lowest at 90%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2020 SEAT Mii EV?

The average mileage recorded at MOT tests on the 2020 SEAT Mii EV is 19,385 miles, which is below the expected 29,600 miles for a 4-year-old car. This suggests lighter use than average, which generally means less wear on major components.