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General Car Chat / Buzzing from headlining/rear window
« on: 21 June 2024, 17:50:58 »
Separating out into a new thread.
Got an intermittent buzzing from somewhere in the back, I believe to be in area of rear headlining or rear window, sounds like an airy wasp stuck in a confined space, or a relay chattering at high frequency.
Remove sigma pod containing the GPS antenna and DAB Band-L receivers, as it appeared to be coming from that area, and putting pressure on PCB changed the tone or eliminated it.
After a test drive with it removed the noise is definitely still there.
I had it present for long enough to do further tests. The noise disappears if:
any window slightly open
and door open
sunroof tilted or open
climate turned off
pressure applied to OS top of rear window and/or that area of roof.
Can it be cabin pressure in the car?
Got an intermittent buzzing from somewhere in the back, I believe to be in area of rear headlining or rear window, sounds like an airy wasp stuck in a confined space, or a relay chattering at high frequency.
Remove sigma pod containing the GPS antenna and DAB Band-L receivers, as it appeared to be coming from that area, and putting pressure on PCB changed the tone or eliminated it.
After a test drive with it removed the noise is definitely still there.
I had it present for long enough to do further tests. The noise disappears if:
any window slightly open
and door open
sunroof tilted or open
climate turned off
pressure applied to OS top of rear window and/or that area of roof.
Can it be cabin pressure in the car?