[bagd0003]

Originally Posted by El30

Yeah they look fine, as far as I can see….I tried putting some hot glue on the back side as well but didn’t help. It needs quite a bit force on the side to stop it from making the noise. You can hear the frequency changing a bit depending on how much force it used

I would try to get it reflowed or re-soldered first to make sure there isn't a cold solder joint before attempting to completely replace the part.

[El30]

Originally Posted by bagd0003

I would try to get it reflowed or re-soldered first to make sure there isn't a cold solder joint before attempting to completely replace the part.

Ok…do you think that could be an issue with the manufacturing process of the board? I ask because I have a replacement unit (complete HVAC control assembly) and has the same high pitch frequency. That’s why I was leaning more towards a “bad” or cheap part that is being used.
Thanks

[bagd0003]

Originally Posted by El30

Ok…do you think that could be an issue with the manufacturing process of the board? I ask because I have a replacement unit (complete HVAC control assembly) and has the same high pitch frequency. That’s why I was leaning more towards a “bad” or cheap part that is being used.
Thanks

Well, if reflowing fixes the issue, then that would mean a poor soldering job during manufacturing.

[bagd0003]

Originally Posted by bagd0003

Well, if reflowing fixes the issue, then that would mean a poor soldering job during manufacturing.

Also, I just chatted with my electrical engineer buddy, he confirmed that reflowing is a good and easy start, but this could also be a normal circuit operation. He suggested gluing some weight (lead?) to it that could help attenuate the noise.

[El30]

Originally Posted by bagd0003

Also, I just chatted with my electrical engineer buddy, he confirmed that reflowing is a good and easy start, but this could also be a normal circuit operation. He suggested gluing some weight (lead?) to it that could help attenuate the noise.

Ok thanks and appreciate the feedback! I’ll try the reflowing route and see how that works.

[El30]

Well back to the drawing board…..had the chip reflowed yesterday and just got done testing it out. Noise is still there

[Markw88]

Does anyone have any update on this issue? Just acquired a 2019 X5 G05 with the same problem and wondering if there's anything I can do to resolve! Thanks

[angschte]

Hi everyone,

Test drove a 2019 X5 M50i today and upon entering I immediately noticed the sound, later could isolate the source as the AC display (color version).

Very glad I found this thread here (or not, because it seems to be a general problem).

Any update from anyone? Did you try replacing with a newer part, now it‘s 2024 and maybe the supplier fixed this?

Best, Fabian

[El30]

Originally Posted by angschte

Hi everyone,

Test drove a 2019 X5 M50i today and upon entering I immediately noticed the sound, later could isolate the source as the AC display (color version).

Very glad I found this thread here (or not, because it seems to be a general problem).

Any update from anyone? Did you try replacing with a newer part, now it‘s 2024 and maybe the supplier fixed this?

Best, Fabian

No updates on my end….found the source but haven’t been able to stop the whine. I am going to, in the next few weeks, pull the chip and attach leads to it removing it from the board. I’ll see if that helps any. I’ve tried a lot of simpler solutions like putting hot glue on it, silicone, putting a bunch of dense foam in front of it but still permeates through. I had it reflowed but nothing.

[angschte]

Originally Posted by El30

No updates on my end….found the source but haven’t been able to stop the whine. I am going to, in the next few weeks, pull the chip and attach leads to it removing it from the board. I’ll see if that helps any. I’ve tried a lot of simpler solutions like putting hot glue on it, silicone, putting a bunch of dense foam in front of it but still permeates through. I had it reflowed but nothing.

Thanks for getting back with an update. It‘s still mesmerizing to me how something like that can a) pass quality control in the first place and b) that BMW does not manage to fix the root cause by updating the design or component on this board.

Let us know if you find a cure. I will be driving another X5 - same year - on the weekend and report back if I can hear it to the same level there.

[angschte]

Originally Posted by angschte

I will be driving another X5 - same year - on the weekend and report back if I can hear it to the same level there.

So after driving another 2019 X5: the hissing noise was there, but much less loud than in the first car. I could only hear it when having my ear close to the AC display. Would not have bothered me here.

Therefore I think there are varying degrees of boards out there.