high pitch sound during acceleration - e92 M3

[FR01]

Originally Posted by ploo

This whistle is all stock

[xfactor]

Would be original

[James T. Kirk]

The issue could be aerodynamic.
Had BMW change a windshield once (not on my present car.) All OEM parts and dealer install, but the trim was installed slightly off. As a result, the car would whistle between 60-65MPH!
.

[xfactor]

Originally Posted by James T. Kirk

The issue could be aerodynamic.
Had BMW change a windshield once (not on my present car.) All OEM parts and dealer install, but the trim was installed slightly off. As a result, the car would whistle between 60-65MPH!
.

hahaha...You're good man Tiberius. But, stick to flux capacitors and bangin alien chicks.

[xfactor]

Update for future searchers:

The issue is definitely from the differential; to be more specific, it's caused by the LSD pinion bearing. If you car is making this noise, then you need to bring it to BMW ASAP. If the car is under warranty, they replace the entire Diff as they don't bother with rebuilding any more.

If you are out of warranty then you have the option to rebuild, but BMW does not sell any of the internal parts; so parts need to be sourced directly from the manufacturer.

[Giccy]

Originally Posted by xfactor

Update for future searchers:

The issue is definitely from the differential; to be more specific, it's caused by the LSD pinion bearing. If you car is making this noise, then you need to bring it to BMW ASAP. If the car is under warranty, they replace the entire Diff as they don't bother with rebuilding any more.

If you are out of warranty then you have the option to rebuild, but BMW does not sell any of the internal parts; so parts need to be sourced directly from the manufacturer.

Which dealership did you get the final verdict from?

[xfactor]

Originally Posted by Giccy Gic

Which dealership did you get the final verdict from?

Parkview and to make sure I also took it to bimmersport.

[GIdriver]

Originally Posted by xfactor

Update for future searchers:

The issue is definitely from the differential; to be more specific, it's caused by the LSD pinion bearing. If you car is making this noise, then you need to bring it to BMW ASAP. If the car is under warranty, they replace the entire Diff as they don't bother with rebuilding any more.

If you are out of warranty then you have the option to rebuild, but BMW does not sell any of the internal parts; so parts need to be sourced directly from the manufacturer.

Thanks for the update. Well now I'm worried. I'm almost certain I hear a whine/whistle from day 1. Don't know if its because of this thread but I believe is more noticeable now, or at least thats my impression. During your search on the subject, did you came across a video or recording of the sound?

[xfactor]

Originally Posted by GIdriver

Thanks for the update. Well now I'm worried. I'm almost certain I hear a whine/whistle from day 1. Don't know if its because of this thread but I believe is more noticeable now, or at least thats my impression. During your search on the subject, did you came across a video or recording of the sound?

I don't have any recording of it now. I did come across one in youtube, but can't seem to find it. I'll try to record it tonight and post it up. PM me if you need more info.

Update:
This is the sound.

[GIdriver]

Originally Posted by xfactor

I don't have any recording of it now. I did come across one in youtube, but can't seem to find it. I'll try to record it tonight and post it up. PM me if you need more info.

Update:
This is the sound.

Thank you so much for taking the time to post the vid!!! Really appreciate it. I'm 98% sure that this is not the noise my car makes. If I'm not mistaken in my car it happens in low RPM's (1500 -2000) in 3rd, 4th and 5th and continue to happen even if off the throttle. But will confirm tomorrow. Thanks again!!

[BMWNTHZST]

This is interesting...subscribed.

[cdavi060]

Originally Posted by GIdriver

Thank you so much for taking the time to post the vid!!! Really appreciate it. I'm 98% sure that this is not the noise my car makes. If I'm not mistaken in my car it happens in low RPM's (1500 -2000) in 3rd, 4th and 5th and continue to happen even if off the throttle. But will confirm tomorrow. Thanks again!!

I seem to have the same sound you may be having, its more of a higher pitched sound, almost electronic sounding, only under throttle, and only at lower RPMs. It not the diff.

[DivideBYZero]

Mine has a kind of screaming sound when under WOT (it's NOT just the engine or the wife, funny guy!).

[sello]

My diff was replaced without any questions noise went away good luck to everyone else with the issue

[GIdriver]

Originally Posted by cdavi060

I seem to have the same sound you may be having, its more of a higher pitched sound, almost electronic sounding, only under throttle, and only at lower RPMs. It not the diff.

In my case noise is more noticeable in 5th at approx 2k rpms. Took the car to the dealer. Chief tech took a drive with me and heard the sound. PUMA case was opened. The checked transmission, differential, bearings, etc. It was NOT the differential in my case. Sound source pinpoint to transmission (DCT). Transmission checked, multiple tests were done (pressures, clutches, fluid, etc). Result: normal operating condition/normal operating sound. As I have said before, I believe I hear this sound from day one. I think I'm to paranoid with my M. However, no harm in getting the car checked at the dealer. Hope this helped.

[///M3AN]

Originally Posted by GIdriver

In my case noise is more noticeable in 5th at approx 2k rpms. Took the car to the dealer. Chief tech took a drive with me and heard the sound. PUMA case was opened. The checked transmission, differential, bearings, etc. It was NOT the differential in my case. Sound source pinpoint to transmission (DCT). Transmission checked, multiple tests were done (pressures, clutches, fluid, etc). Result: normal operating condition/normal operating sound. As I have said before, I believe I hear this sound from day one. I think I'm to paranoid with my M. However, no harm in getting the car checked at the dealer. Hope this helped.

+1 on paranoia

I'm only a few weeks in on my M3 but I have learned not to chase noises. I used to chase noises on my first corvette. I quickly learned to "let it break" or get so bad that the problem is easily identified. I had a popping in one of my wheels and after several U-Joint changes (because every mechanic said "definitely U-Joint") the noise was still there... I was so fed up with it finally said "EFF IT, let the wheel fall off" and just dealt with the noise... nothing ever came of it and eventually sold the car. Truth is, when mechanics are chasing noises they are guessing at the expense of your checkbook...

[sello]

not when your under warranty

[ReCovery]

Originally Posted by cdavi060

I seem to have the same sound you may be having, its more of a higher pitched sound, almost electronic sounding, only under throttle, and only at lower RPMs. It not the diff.

i have this too, almost sounds like some electric noise coming from the speakers from bad wiring.

[kb9uwu]

Originally Posted by ReCovery

i have this too, almost sounds like some electric noise coming from the speakers from bad wiring.

wonder if any of these guys still own there M3s?

[Lindz]

Originally Posted by xfactor

Hi Guys,

Just started to get a new high pitch sound (like a hollow whistle), when I slightly press down on the accelerator. It's somewhere around 3-3500 RPM (specifically in 3rd/4th gear). When I press pass the point the sound goes away, it's only when I hold on to that point in throttle the sounds remain. I have a appt set-up at the local dealer for next week, but was curious to see if anyone have gone through this or have a clue on what's going on.

Thanks in advance,
-a

Hi, have you received any responses to this issue other than what is posted here perhaps?