KIA EV6 GT-LINE (2021)
Running costs, reliability data, and common problems from 435 real MOT tests.
Annual Cost
£950
£79/month
MOT Pass Rate
96%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 1-8
0cc Electric
Great Choice
96% pass rate, £950/year to run. 14 points above average.
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Annual Running Costs
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 14 points above the national average of 82%. It also outperforms the KIA brand average of 86%.
At 5 years old, 96% of KIA EV6 GT-LINEs from 2021 passed their MOT first time in 2026. That's based on 435 tests across the UK. The average mileage at this age is 27,904 miles.
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How Does It Compare?
Mileage Analysis
27,904
Average miles
37,000
Expected for age
The average 2021 KIA EV6 GT-LINE has 27,904 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Best Year to Buy?
The most reliable year is the 2022 model with a 98% MOT pass rate, while the 2023 model has the lowest at 79%. The 2021 sits between the two at 96%.
KIA EV6 GT-LINE by Year
Similar Cars to Consider
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About the 2021 KIA EV6 GT-LINE
The 2021 KIA EV6 GT-LINE is a electric with a 0cc electric engine. 435 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 17% of all 2021 cars for reliability.
With an average of 27,904 miles at 5 years old, KIA EV6 GT-LINE owners tend to use this car less than the typical driver.
What does it cost to own a 2021 KIA EV6 GT-LINE?
Total estimated annual running cost is £950 (£79/month), broken down as £500 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
KIA EV6 GT-LINE Reliability Trend
Older KIA EV6 GT-LINEs tend to have better MOT pass rates than newer ones, with an average decline of 8 percentage points across model years.
Buying a Used 2021 KIA EV6 GT-LINE
At 5 years old, the KIA EV6 GT-LINE 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 2022 model has the highest pass rate at 98%.
Common Issues to Watch For
Based on the 2021 KIA EV6 GT-LINE's fuel type, age, and engine size, these are the most likely problem areas to check.
Battery Degradation
Medium riskAfter 5 years, expect some battery capacity loss. Check the battery health report for state of health (SoH). Below 80% significantly reduces range.
Charging Port
Medium riskCharging connectors and ports can develop issues from regular use. Check both AC and DC charging work correctly before purchasing.
Software Updates
Medium riskOlder 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 riskEVs 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 riskAlways 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 2021 KIA EV6 GT-LINE stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| KIA EV6 GT-LINE(2021) | 96% | £500 | £195 | Grp 1-8 | £950 |
| TESLA MODEL 3 LONG RANGE AWD(2021) | 88% | £500 | £190 | Grp 1-8 | £1095+£145 |
| JAGUAR I-PACE(2020) | 96% | £500 | £190 | Grp 1-8 | £945-£5 |
| TESLA MODEL 3 STANDARD RANGE +(2021) | 88% | £500 | £190 | Grp 1-8 | £1095+£145 |
| TESLA MODEL 3 PERFORMANCE AWD(2020) | 87% | £500 | £190 | Grp 1-8 | £1095+£145 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Kia Models
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