2011 BMW 3 Series 328 coupe
Humming sound coming out of speakers when car is off

Avatar
jhlafren
Driver
1 points

Problem added: Jul 8, 2017 (3 years ago)
fter I closed it.also when car is running.
very annoying. audio person thought I might try to replace radio and amplifier in trunk (boot). But I this seems to be some weird electronic signal it is getting. When I was charging the car it was really loud if I opened the car door, and for 30 seconds after.
this has been going on for several years. I stopped driving the car it was so annoying. also makes louder sound if I use turn signal indicator. Any ideas?. RF problem? grounding? Help!

Car details
Car: BMW 3 Series
Variant: 328 coupe
Model Year: 2011
Category: Leaks & Noises
Replies and Fixes
Avatar
1/4drive
Legend
1,890 points

Jul 8, 2017 (3 years ago)
Has to be getting this "signal" from somewhere.
And as it's getting it when the car is "off" I'm leaning to a power system that's independent from the key.
Your going to need an auto spark to chase this down.
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