Fault File
All models / All cars / Family & large SUVs / Kia EV6

Kia EV6

All generations and engines together · 2,084 MOT tests in the 2025 data

How this model wears

Kia EV6Class average, all tracked models

Known issues

Measured

Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.

What testers flag

Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.

Faults with the car itself

The rows that judge the model rather than its keeper. 2,084 tests in this band.

A suspension pin, bush or joint excessively worn
Advisory
0.4%class 2.4%
Excessive fluctuation in brake effort through each wheel revolution.
Advisory
0.2%class 0.3%

Wear, upkeep and luck

Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.

Tyre tread depth not in accordance with the requirements
Advisory
27.9%class 18.8%
Wiper blade missing or obviously not clearing the windscreen
Fail
5.5%class 1.7%
A tyre seriously damaged
Advisory
3.6%class 12.3%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
3.3%class 7.0%
Wiper blade defective
Minor
3.3%class 1.1%
Child Seat fitted not allowing full inspection of adult belt
Advisory
2.5%class 2.1%
Tyre tread depth not in accordance with the requirements
Fail
2.5%class 2.3%
A tyre seriously damaged
Fail
2.3%class 1.6%

Unconfirmed issues

Reported

Owner folklore from forums and the motoring press. Most of it never shows up in an MOT, which is why this section exists at all.

ICCU failure and 12V battery drain

Confirmed pattern

The Integrated Charging Control Unit manages both high-voltage charging and top-up of the small 12V battery, and thermal or electrical stress (especially from repeated AC charging) can damage it or its high-voltage fuse. Owners see a 12V warning light, a sudden drop in available power while driving, or a car that simply won't start after sitting overnight. Kia has run a UK recall (DVSA campaign 241041) covering 2022-2024 build cars to inspect and replace the ICCU and fuse and update the software for free, so check this has been done on any car in that range.

Mainly 2022-2024 build cars · sources: DVSA recall database, Kia EV Forum, Speak EV

No heat or heat cutting out on early cars

Early Sept-Dec 2021 build only

A batch of the earliest UK-delivered EV6s (built roughly September to December 2021) left the factory with a heating fault: no heat at all on startup, or the heat working for about 20 minutes then cutting out and refusing to restart, sometimes affecting the demister too. It's a PTC heater/heat pump control issue, and Kia's fix is a dealer software update rather than new parts. Worth confirming on any very early car that the update has been applied.

Early 2021-build cars · sources: Kia Owners Club forum, Speak EV, owner-run "Is My EV6 Fixed Yet" campaign site

Infotainment screen freezing or rebooting

Emerging

A minority of owners report the central touchscreen (and occasionally the driver's instrument cluster) randomly rebooting, freezing solid, or going black until the car is restarted, and this crops up more often around a failed or interrupted software update. It's not tied to a specific mileage or age and isn't officially acknowledged as a defect. A dealer reflash usually sorts it and there's no parts cost, but a car mid-update when you view it is worth a second look.

No fixed mileage pattern · sources: Kia EV Forum, Kia Owners Club forum

Rear brake and disc corrosion from underuse

Disputed

Because regenerative braking does most of the slowing down, the physical brakes get little work, so rear discs can rust on the friction surface and caliper slide pins can seize, particularly on cars used for short trips or left standing. Owners are split on whether this is a fault or just something EV drivers need to manage with an occasional harder stop. It can show up within a couple of years as grinding, binding, or an MOT advisory for corroded discs; a caliper rebuild or disc replacement runs roughly £150-700 depending on how far it's got.

Reported from 20-40k miles or 2-3 years · sources: Kia EV Forum, Speak EV, Kia Owners Club forum

Keyless entry and remote lock glitches

Emerging

Separate from the well-known relay-theft risk, some owners find the door handles don't unlock on approach even though the mirrors fold out as expected, forcing them to use the fob button instead, and a few report the remote button locking the car when they meant to unlock it. It seems intermittent and software-related rather than tied to one model year. No cost to the buyer if it's a known glitch since it's a warranty/software matter, but worth testing on a viewing.

No fixed mileage pattern · sources: Kia Owners Club forum, Honest John owner reviews

Viewing one? Ask this

Built from the two sections above.

Ask for evidence the ICCU/12V recall (DVSA campaign 241041) has been carried out on 2022-2024 cars. If it hasn't been done, book it in before relying on the car; an unfixed ICCU can drain the 12V battery and cut power while driving.
On a very early car (built late 2021), run the heater from cold and let it run for 20-30 minutes. Heat that cuts out and won't restart, or no heat at all, points to the known early-build heating fault.
Wake the infotainment screen, run through a few menus and start navigation. Any freeze, black screen, or unprompted reboot suggests the reported software glitch, especially if a dealer update seems to be mid-way.
Check the MOT history for advisories on corroded discs or binding brakes, and listen for grinding on the test drive. Regen-braked EVs can rust their rear discs and seize caliper pins from underuse, worse on low-mileage or short-trip cars.
Walk up to each door with the fob in your pocket and try to unlock it, then try the remote button separately. A handle that won't unlock despite the mirrors folding out, or a remote that locks instead of unlocks, matches the reported keyless glitch.
Ask how the car has mostly been charged and driven (home AC charging vs frequent rapid charging, short hops vs longer runs). Heavy AC charging patterns are linked to ICCU stress, and short-trip-only use makes brake corrosion more likely.
Check the service history for any software update visits beyond routine servicing. Repeated unexplained software update entries can mean the car has a history of one of these electrical gremlins.

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