Unconquerable buzzing sound in or behind dash at 4K RPM
11-06-2020, 10:54 PM
#1
Unconquerable buzzing sound in or behind dash at 4K RPM
After two years, I still can't defeat the buzzing sound that emanates from my center console at 4K RPM. It goes away by about 5K RPM. The dealer acknowledged it was an issue and tried putting some foam around the ash tray--this seemed to temporarily help but then the buzz came back. I took the car to an indie shop who tried removing all sorts of interior parts to test whether they were causing the noise: (1) center console trim / ashtray, (2) A/C control unit, (3) PCM. None of it made a difference. They think they can hear the sound emanating from up to the right behind the PCM unit.
To complicate, my car has the following installed: (1) Numeric shifter and cables and (2) Akrapovic race headers (side muffler delete) and center bypass. However, these were dealer-installed when the car was bought new. Also, others with these modifications don't seem to experience this noise and the indie shop says they have never come across it before.
Next step is to go back to the dealer and ask that they look harder for the noise, which the indie shop thinks will involve disassembling the whole dash. If they don't want to help, I may have to write PCNA.
Anyone else having a similar issue? Any ideas?
To complicate, my car has the following installed: (1) Numeric shifter and cables and (2) Akrapovic race headers (side muffler delete) and center bypass. However, these were dealer-installed when the car was bought new. Also, others with these modifications don't seem to experience this noise and the indie shop says they have never come across it before.
Next step is to go back to the dealer and ask that they look harder for the noise, which the indie shop thinks will involve disassembling the whole dash. If they don't want to help, I may have to write PCNA.
Anyone else having a similar issue? Any ideas?
11-06-2020, 11:03 PM
#2
RL Community Team
Rennlist Member
Rennlist Member
You might check your radio speakers.
11-07-2020, 12:19 AM
#5
11-07-2020, 01:49 AM
#6
Burning Brakes
This may sound stupid but if you have a garage door opener in your car make sure it’s not the metal piece vibrating against the visor or plastic areas. Same with any loose change. Took me months to figure out my opener was making the vibrations.
11-07-2020, 02:08 AM
#7
Thanks for the suggestion—we already tried emptying out the glove box.
Trending Topics
11-07-2020, 05:03 AM
#10
11-07-2020, 05:47 PM
#12
I had a similar rattle and I traced it to my airbag. Dealer replaced the airbag and sound went away.
If you have the smoking package, I'd take a look at the door for the ash tray. For me, it's coming from the door hinge area and I stuck some foam in the ash tray when not in use so it helps to absorb the vibration.
I can tell you that PCNA is not going to help at all for noise issues. I've even had them tell me on another car that there is some clause in manual that all cars make mechanical noises and referred me to the paragraph in the manual.
I'd say if your dealer isn't helpful, try another nearby dealer. Sometimes another shop foreman is willing to do more than others.
If you have the smoking package, I'd take a look at the door for the ash tray. For me, it's coming from the door hinge area and I stuck some foam in the ash tray when not in use so it helps to absorb the vibration.
I can tell you that PCNA is not going to help at all for noise issues. I've even had them tell me on another car that there is some clause in manual that all cars make mechanical noises and referred me to the paragraph in the manual.
I'd say if your dealer isn't helpful, try another nearby dealer. Sometimes another shop foreman is willing to do more than others.
11-07-2020, 06:04 PM
#13
I had a similar rattle and I traced it to my airbag. Dealer replaced the airbag and sound went away.
If you have the smoking package, I'd take a look at the door for the ash tray. For me, it's coming from the door hinge area and I stuck some foam in the ash tray when not in use so it helps to absorb the vibration.
I can tell you that PCNA is not going to help at all for noise issues. I've even had them tell me on another car that there is some clause in manual that all cars make mechanical noises and referred me to the paragraph in the manual.
I'd say if your dealer isn't helpful, try another nearby dealer. Sometimes another shop foreman is willing to do more than others.
If you have the smoking package, I'd take a look at the door for the ash tray. For me, it's coming from the door hinge area and I stuck some foam in the ash tray when not in use so it helps to absorb the vibration.
I can tell you that PCNA is not going to help at all for noise issues. I've even had them tell me on another car that there is some clause in manual that all cars make mechanical noises and referred me to the paragraph in the manual.
I'd say if your dealer isn't helpful, try another nearby dealer. Sometimes another shop foreman is willing to do more than others.
11-08-2020, 10:05 AM
#14
Rennlist Member
Fixed
I have the exact same problem recently in my 2018 Touring. It got louder and louder until I couldn't stand it anymore. I took it to Hendrick Porsche in Charlotte and an excellent mechanic there spent quite a bit of time and found several sources behind the PCM. Not the AC unit. He put felt tape around those. Also found the ashtray was part of the problem. Fixed! The car sounds so much better now that the annoying vibrations have been removed!
11-08-2020, 10:28 AM
#15
I have the exact same problem recently in my 2018 Touring. It got louder and louder until I couldn't stand it anymore. I took it to Hendrick Porsche in Charlotte and an excellent mechanic there spent quite a bit of time and found several sources behind the PCM. Not the AC unit. He put felt tape around those. Also found the ashtray was part of the problem. Fixed! The car sounds so much better now that the annoying vibrations have been removed!