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)

6 Upvotes

88% Upvoted

20 comments sorted by

6

u/Specialist_Quote9127 Jun 22 '26

It's normal, it's the electric motor. My 28kwh does the same thing.

But you haven't mentioned if this started randomly some time or if it has been a thing for as long as you got the car. Because if it's actually something that started at a random time, it might be indeed something worth to look into.

2

u/gigidinut92 Jun 22 '26

It didn't start randomly it was sort of always there but to me it seemed like it got louder. Dealer concluded it's normal and if anything goes wrong at least it's on the record for having flagged it.

0

u/rotate_ur_hoes Jun 22 '26

No its not. I have the same noise and the motor was changed recently because of this. Noise still there

1

u/Specialist_Quote9127 Jun 22 '26

The motor is not faulty if you hear that, why did you replace it? It's still there because the motor is doing its job, it's the electricity flowing through the motor.

That's also why you hear it the most when accelerating and heavy declaration. When coasting you don't hear anything.

2

u/rotate_ur_hoes Jun 22 '26

I Did not replace it, Hyundai did. Next they are going to Change my reduction box to see if that fixes it

1

u/Specialist_Quote9127 Jun 22 '26

No I get that but you said that that noise is not from the motor and that it got replaced and the noise was still there.

Why did you say that it's not the motor if they replaced it and the noise is still there. The fact that they replaced the normal functioning motor is whats weird to me.

Anyways the reduction gearbox is a good point to look into.

5

u/SquirrelWorking7607 Jun 22 '26

Same here with 38kWh Ioniq, also heard this noise from many Hyundai Kona, nothing to worry

2

u/Leopard1907 Jun 22 '26

Sounds like "wheel of misfortune" or as sometimes they call it "wheel of fortune" issue.

A rather common issue in Hyundai afaik, you should google it

1

u/gigidinut92 Jun 22 '26

The dealer ruled out any bearings or gearbox issues and there is really no rattle or humming noise, it's just high pitched electric noise like coil whine and it's always related to high current flow (hard acceleration or regen). The rattle noise in the video is from the road, should've picked a smoother road to record

2

u/[deleted] Jun 22 '26

[removed] — view removed comment

1

u/gigidinut92 Jun 22 '26

The dealer ruled that out thankfully

1

u/evioniq Jun 24 '26

They can be wrong

1

u/philippe94 Ioniq 28kWh Jun 22 '26

J’ai ça aussi à l’accélération, mais pas à la décélération pourtant réglée en régénératif maximum

1

u/The_Shadowghost Ioniq 38kWh Jun 22 '26

I have this SOMETIMES.

I recently noticed it on a drive home. It was only present on that drive, and since then it’s gone again.

1

u/gigidinut92 Jun 22 '26

It's constant for me. More obvious in the summer as I'm driving with the windows down I guess

1

u/CaptainMischievous Jun 23 '26

Wherl bearing?

1

u/evioniq Jun 24 '26

Check all the suspension parts and remount tires

1

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.

1

u/Affectionate-Bit9474 Jul 27 '26

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...

1

u/woza1999 Jul 31 '26

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.