KIA EV6 GT-LINE S (2021)
Running costs, reliability data, and common problems from 551 real MOT tests.
Annual Cost
£950
£79/month
MOT Pass Rate
95%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 1-8
0cc Electric
Great Choice
95% pass rate, £950/year to run. 13 points above average.
Check a specific KIA EV6 GT-LINE S
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
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.
Get an insurance quote for this KIA EV6 GT-LINE S
Compare quotes and find the best deal
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%. It also outperforms the KIA brand average of 86%.
At 5 years old, 95% of KIA EV6 GT-LINE Ss from 2021 passed their MOT first time in 2026. That's based on 551 tests across the UK. The average mileage at this age is 23,376 miles.
Got a KIA EV6 GT-LINE S you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
23,376
Average miles
37,000
Expected for age
The average 2021 KIA EV6 GT-LINE S has 23,376 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.
Looking at a specific KIA EV6 GT-LINE S?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
Best Year to Buy?
The most reliable year is the 2022 model with a 97% MOT pass rate, while the 2021 model has the lowest at 95%. Consider a different year if reliability is a priority.
KIA EV6 GT-LINE S by Year
Similar Cars to Consider
Check a Specific Kia Ev6 gt-line s
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 2021 KIA EV6 GT-LINE S
The 2021 KIA EV6 GT-LINE S is a electric with a 0cc electric engine. 551 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 23,376 miles at 5 years old, KIA EV6 GT-LINE S owners tend to use this car less than the typical driver.
What does it cost to own a 2021 KIA EV6 GT-LINE S?
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 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 KIA EV6 GT-LINE S
At 5 years old, the KIA EV6 GT-LINE S 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
Based on the 2021 KIA EV6 GT-LINE S'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 S 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 S(2021) | 95% | £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
Explore other Kia cars or similar models in the same category.
KIA SPORTAGE
2016 · 1700cc Diesel
KIA PICANTO
2018 · 998cc Petrol
KIA CEED
2012 · 1591cc Diesel
TESLA MODEL 3 LONG RANGE AWD
2021 · 0cc Electric
JAGUAR I-PACE
2020 · 0cc Electric
TESLA MODEL 3 STANDARD RANGE +
2021 · 0cc Electric
Related Guides
In-depth articles relevant to the Kia Ev6 gt-line s.
Cheapest Cars to Insure in the UK: Insurance Groups 1-10
9 min read
Running CostsCheapest Cars to Run in the UK: A Complete Cost Breakdown
11 min read
Running CostsCheapest Cars to Run in 2026: Real Data from 19.8 Million MOT Tests
9 min read
Running CostsElectric Car Running Costs UK (2026): The Real Numbers
14 min read
Running CostsElectric vs Petrol Running Costs UK 2026: EV is £1,247 Cheaper/yr
15 min read
Check a specific KIA EV6 GT-LINE S
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a KIA EV6 GT-LINE S? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
Competitors charge £10-£20 for the same data