[yves998]

Hello everyone.
My G87 M2 has this extremely mild whining noise (almost sounds like an EV car) when it's at around 60kph in D and I'm giving mild throttle input. The noise will disappear if I go faster or downshift or simply press the gas pedal harder. Also it can only be heard with windows closed. I also noticed that the noise appears when the boost gauge started to show a lil bit movement in the cluster. I'm wondering if this is normal? Or if there's anything potential failure I should keep my eyes on?

Removing the charcoal filter and installing BMC filter doesn't really change the whistle noise level. I was also assuming it's exhaust leak from 2nd resonators delete with xpipe but turns out there's no leak at all.

https://youtube.com/shorts/NPtiP5aDb...5kCWsSVZNhItN6

I hope you guys can leave your opinions. It's barely even noticeable in the video but that's literally how low the volume of this whining noise is.

[aerobod]

Sounds like the turbo spooling up.

[yves998]

Originally Posted by aerobod

Sounds like the turbo spooling up.

Thank you so much for curing my paranoid!!

[Squidget]

Oddly I haven't been able to hear it on my g87. But It does sounds like the turbo, my E90 N55's turbo has the exact behavior you describe.

[Squidget]

Another thing you can maybe do to confirm is: put the turbo boost meter on the center display and see if it tracks.

[yves998]

Originally Posted by Squidget

Another thing you can maybe do to confirm is: put the turbo boost meter on the center display and see if it tracks.

The noise actually appears as soon as that gauge moves a lil bit. Like even by few pixels.

[Squidget]

Originally Posted by yves998

The noise actually appears as soon as that gauge moves a lil bit. Like even by few pixels.

Yeah, that tracks, the turbine has to spool before the pressure can build.

[yves998]

Originally Posted by Squidget

Yeah, that tracks, the turbine has to spool before the pressure can build.

Should I stop my paranoid then? Really want to flash the xhp stage3 rn but still worried about if I need a warranty work lol.

[Squidget]

Originally Posted by yves998

Should I stop my paranoid then? Really want to flash the xhp stage3 rn but still worried about if I need a warranty work lol.

I don't think you need warranty work, no. And you can trust me, I'm a dude on the internet.

[M_Power Rob]

Originally Posted by Squidget

I don't think you need warranty work, no. And you can trust me, I'm a dude on the internet.

I would have felt more comfortable if you had stayed at a Holiday Inn Express last night....

[yves998]

Quick update guys. I noticed the whine is consistent when I'm turning the cruise control on 60-70kph as well as mild acceleration. Is it possible the whine is coming from differential?