Kia EV6 Battery Health & Range: Used Buyer’s Guide

Photo by Hyundai Motor Group on Unsplash

Quick answer

A used Kia EV6 (2021-present) typically has usable ~54 kwh (58, standard range) or ~74 kwh (77.4, long range); ~80 kwh (84) on the 2024 facelift, a WLTP range of around 245-361 miles depending on battery and drivetrain when new, and a battery warranty of 7 years / 100,000 miles covering the car and battery (transferable), with the battery guaranteed to at least 70% capacity, extended to 8 years on cars registered from 2024. The value of any individual car comes down to its battery health, check the real-world range now versus when new before you buy.

Kia EV6 at a glance

Body type	Crossover / fastback SUV
Years	2021-present
Battery (usable)	Usable ~54 kWh (58, Standard Range) or ~74 kWh (77.4, Long Range); ~80 kWh (84) on the 2024 facelift
WLTP range (new)	Around 245-361 miles depending on battery and drivetrain
Real-world range	Roughly 180-280 miles in real use depending on battery
Battery warranty	7 years / 100,000 miles covering the car and battery (transferable), with the battery guaranteed to at least 70% capacity, extended to 8 years on cars registered from 2024
Battery cooling	Active liquid cooling

Figures are typical across the model's life and vary by year and trim, treat them as a guide, not a guarantee for a specific car.

How the EV6's battery ages

Battery cooling is a big part of the story: this car uses active liquid cooling. Cars that have spent their life on rapid chargers, been left sitting at 100%, or lived somewhere hot tend to lose capacity faster, which is why two identical EV6s on the same mileage can be worth different amounts. Read more in our guide to what's normal for EV battery degradation.

What to watch out for on a used Kia EV6

The ICCU recall is the big one: confirm it was completed and, ideally, that the part was replaced rather than only reflashed, repeat failures have been reported
Three different batteries (58, 77.4 and the 2024 facelift’s 84 kWh) on near-identical cars, confirm which you’re viewing
The headline 800V rapid-charging speed only happens on a 350 kW-class charger, on a common 50 kW unit it’s no faster than rivals
Check heat-pump fitment on early trims, it affects winter range and charging preconditioning

What the Used EV Check shows for a Kia EV6

Enter the registration and the Used EV Check returns, for that specific EV6: its expected real-world range now versus when new, an estimated degradation figure, a battery-health grade where a manufacturer test record exists, and the battery warranty remaining in miles and months. It also pulls the full MOT and mileage history so you can spot clocking or a car that has covered far more motorway miles than the advert suggests.

It's the fastest way to tell a good Kia EV6 from a tired one before you drive out to view it. For the wider process, see our complete used-EV buyer's guide and how to check an EV's battery health.

Range and battery-health figures are estimates modelled from real-world data and are shown for the specific vehicle in the Used EV Check. Range data is powered by ClearWatt. A battery-health grade is shown where a manufacturer test record exists, it is a comparative grade, not a measured state-of-health percentage.

Range data powered by ClearWatt

Check a used Kia EV6 before you buy

Enter a registration to see this EV6's battery health, real-world range now vs when new and remaining battery warranty, an instant report.

See the Used EV Check (£9.99) →Try the free EV check

Used Kia EV6 FAQ

How do I check a used Kia EV6's battery health?+

You can't see battery state of health on the V5C, the MOT or the advert, and DVLA doesn't publish it. Enter the registration into the Used EV Check and it returns this Kia EV6's estimated real-world range now versus when new, its degradation estimate, a battery-health grade where a manufacturer test record exists, and the remaining battery warranty. Range data is powered by ClearWatt.

How much battery degradation is normal on a used Kia EV6?+

The 800V E-GMP pack has a strong durability reputation, with US fleet data showing the EV6 holding around 97% of its range after five years. The thing to check on a used EV6 is not gradual fade but whether the ICCU recall has been dealt with properly, since that is where the real-world battery trouble on these cars has been. As a rule of thumb, most EV batteries lose the first few percent early on and then settle to a slow decline, so a used EV6 that still returns close to its original range for its age and mileage is a good sign. The Used EV Check estimates this specific car's degradation for you.

What battery warranty does the Kia EV6 have?+

Kia EV6 battery warranty is typically 7 years / 100,000 miles covering the car and battery (transferable), with the battery guaranteed to at least 70% capacity, extended to 8 years on cars registered from 2024. It covers the battery falling below a set capacity within that time or mileage, and it usually transfers to you as the next owner. The Used EV Check shows how much of the warranty is left in miles and months.

What is the real-world range of a used Kia EV6?+

Around 245-361 miles depending on battery and drivetrain is the WLTP figure when new. In real use expect roughly 180-280 miles in real use depending on battery, and less again in cold weather or at motorway speeds. What matters on a used car is the expected range now, which the Used EV Check estimates for the specific vehicle rather than quoting the brochure.

What is the Kia EV6 ICCU problem?+

The ICCU (Integrated Charging Control Unit) is the part that keeps the 12V battery topped up from the main pack. On many 2021 to early 2024 EV6s it can fail, letting the 12V drain while driving, which brings on warning lights, reduced power and, at worst, a loss of drive. It is covered by a UK recall: the fix is a software update and, where needed, a new ICCU. Because some cars have failed again after a software-only fix, check by registration that the recall was done and ideally that the unit itself was replaced.