[umb2021]

Hello all,

My G30 LCI has a very strange sound coming from behind the climate control.

It sounds like the fan hitting something. The engine is off and only the climate is running on the passenger side at 22 degrees Celsius with the fan speed at medium settings.

I have enclosed a video of the sound. Anyone experienced this?

Link to video on Vimeo:


Link to video on YouTube:

[umb2021]

Originally Posted by umb2021

Hello all,

My G30 LCI has a very strange sound coming from behind the climate control.

It sounds like the fan hitting something. The engine is off and only the climate is running on the passenger side at 22 degrees Celsius with the fan speed at medium settings.

I have enclosed a video of the sound. Anyone experienced this?

Link to video on Vimeo:

Can anyone do me a favour and teat whether this also happens with their car?

[LogicalApex]

I don’t see the video so I can’t comment on it. Does the video show for you?

[umb2021]

Originally Posted by LogicalApex

I don't see the video so I can't comment on it. Does the video show for you?

Hi LogicalApex,

I uploaded the video to YouTube. Maybe that works?

[umb2021]

Anyone?😅 I uploaded a YouTube video with the noise. It is really bugging me now.

[CnSky]

Does it stop when you turn off the climate control?

Just to be sure it climate control related.

Sounds like a fan bearing that is gone or about to go.

[umb2021]

Originally Posted by CnSky

Does it stop when you turn off the climate control?

Just to be sure it climate control related.

Sounds like a fan bearing that is gone or about to go.

Yes it stops when the climate is off. Funny thing is that the noise goes away when the fan is on high speed. Hmm🧐

I find it strange that a model 2021 car that has only been on the road for 7 months can have an issue like this. I still have warranty so I guess it should be fixed under warranty?

[CnSky]

Get BMW to solve it on that case it's a weird one.

[umb2021]

Originally Posted by CnSky

Get BMW to solve it on that case it's a weird one.

Yeah it's weird. Specially because the noise goes away when fan speed is on the highest.

[G35c6MT]

I've heard the same noise in my '21. I'll verify and record it. I assumed it was normal.

[umb2021]

Originally Posted by G35c6MT

I've heard the same noise in my '21. I'll verify and record it. I assumed it was normal.

I don't think it's normal. Never heard it in any other car and it does sound like something is wrong.

[G35c6MT]

Recorded this last night with the car off. It's only noticeable when the engine shuts off during auto stop/start.

https://youtube.com/shorts/2ATJzxssreQ

[umb2021]

Originally Posted by G35c6MT

Recorded this last night with the car off. It's only noticeable when the engine shuts off during auto stop/start.

https://youtube.com/shorts/2ATJzxssreQ?feature=share

That's precisely how mine sounds. I can't hear it on the highway. What I want to know is, why does this happen.

[LexProf]

Ages ago, in my F90 M3 I had that sound, as did other people with F90s. Turned out a leaf got into the air intake for the HVAC and was sitting in the fan housing. The noise tone changed as the fan speed increased or decreased and you couldn't really hear it when the fan was on high. It happened more than once on my car, and so the service tech showed me how to fix it myself. Could be that.

[umb2021]

Originally Posted by LexProf

Ages ago, in my F90 M3 I had that sound, as did other people with F90s. Turned out a leaf got into the air intake for the HVAC and was sitting in the fan housing. The noise tone changed as the fan speed increased or decreased and you couldn't really hear it when the fan was on high. It happened more than once on my car, and so the service tech showed me how to fix it myself. Could be that.

That's precisely what happens on mine. When I put the fan speed on high, it goes away.

How do I fix it?

[LexProf]

I'm not sure how to fix it on a G30. But in my F90 you just popped the hood, and there was some plastic box near the windshield that was the air intake for the HVAC system. You basically had to open it and then you could see inside the blower fan compartment. And that's where the leaves would slip in. Then you just took a snake with a grabber on the end, and pull the leaf out.

[NGT2]

I can't hear the video sound unless my AirPods are in, which aren't handy at the moment. It looks like it's probably a leaf, but I had a noise in a Chevy Tahoe hvac once that I was convinced was a leaf. Turned out to be an actuator that was going out. If that's the case, on a 2021, surely they will replace it for free. When I had that problem on the Tahoe, it was a 14 year old truck.

If it turns out to be a leaf, hopefully they can show you how to check for yourself in the future. Good luck!