Engine whine through audio.

Natishin · Post by **Natishin** » Fri Sep 17, 2021 5:00 pm

I have a 2003 Z4 and an Android phone.
When I plug in a 12v adapter in the cigarette lighter to charge my Samsung phone I hear the engine rev's whining through my speakers.
Do I need a specific BMW adapter?
I remember back in the '80's I'd do something with the spark plug leads that would suppress the noise.
Any ideas?
Thanks.

Steve
2003 Z4 3.0i, Merlot.

mr.tourette · Post by **mr.tourette** » Fri Sep 17, 2021 6:13 pm

That would generally indicate a bad earth on the audio equipment as a rule, however throwing in charging a phone does seem to cause others to have said whine so is more likely electrical interference.. are you using a cheapo chinese charger in the socket ? If so Id start by buying a genuine item from Samsung and see how you fare then, I never had issues using a genuine Sony lighter socket charger

rdm05z4 · Post by **rdm05z4** » Fri Sep 17, 2021 8:36 pm

Wait what there are people out there that listen to radio , music while driving their cars!!! Oh the shame of it!! The best music is the sound of the exhaust!! But all kidding aside as stated it probable is a bad ground etc. And yes I too am old enough to remember the noise suppressors that were needed to be installed. Good luck with your issue.

Natishin · Post by **Natishin** » Fri Sep 17, 2021 9:09 pm

Are you able to direct me as to where the ground is located for the radio?

rdm05z4 · Post by **rdm05z4** » Fri Sep 17, 2021 9:16 pm

It depends on the unit you have. Unlike the units of old most of the newer ones don't have a separate ground wire. The usually are bundled with the newer connectors. The best advice and give is to do a search on your make model of unit for ground wire, or ignition noise. I suspect you may get more information that I can provide with not seeing the setup. Good Luck.

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