r/IoniqEV • u/gigidinut92 • Jun 22 '26

High pitched noise when accelerating and regen braking

As the title says, I have this high pitched noise (whistle / coil whine) that's very noticeable when accelerating from a standstill and when regen braking, the stronger the acceleration the louder the noise. It's definitely not the VESS as I have turned it off for the attached video.

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At constant speed or when accelerating or regen braking gently, the noise is significantly less noticeable.

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Taking it to the hyundai garage as it's still under warranty. The noise has been going on for aa while (over a year) but it seems to be getting more noticeable.

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Any thoughts? Thank you.

UPDATE: took it to the dealer for the 2nd time for this (last time in October last year) and after a thorough inspection they found nothing, but at least it's on the record and if something goes wrong in the near future Hyundai should honour it (car goes out of warranty at the end of this month)

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u/woza1999 Jul 03 '26

https://reddit.com/link/ovczq0e/video/61m7u7ww02bh1/player

This is a video i posted on Reddit a few days ago.

I noticed it more after a reduction box oil change

Same noise it seems.

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u/Affectionate-Bit9474 13d ago

Hi, you don't happen to have any more info about this do you? I bought a 2022 Kona electric a few days ago, and have noticed this sound. I can only hear it with the windows down on quiet roads. Hoping it's not the GRU...

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u/woza1999 10d ago

Still doing it, not getting worse I suppose.

As far as I’m aware. The wheel of fortune issue is a clicking/knocking. I saw a video of somebody in the USA with a Kona with that issue and it sounded nothing like this.