08 e92 m3 faint hiss

[xcharlesy]

I'm experiencing a slight hiss in my M3. It's very faint but I can always kind of hear it, even when I turn the radio off by pressing the volume button in. Im really unsure as to what it may be? but it's sort of starting to annoy me. Im 23 and recently had a hearing test and I daily the car so it's obvious to me, but the shop foreman at my local BMW was unable to hear it while I had my car in for service.. so I sort of let it go for then.

Is there anything I can try to weed out what it may be?

The best way I can describe it is like a aux cable being unplugged and while the volume is up, but slightly more faint of a hiss.

I was even thinking maybe updating all my software from the dealer would cure it?

What do you guys think?

[Lute__]

I had this hiss and it became louder and more pronounced as time went on.

Turned out my head unit was bad, it was replaced under warranty.

[xcharlesy]

I'm under CPO, and no electronics are covered..

how many miles do you have?

[Lute__]

I have 12K miles and still under the 4 year factory warranty.

The radio cost $500 plus another $300 for install and coding and this is non-I-drive. I can imagine I-drive is significantly more. That's if it turns out to be the head unit.

Best of luck

[xcharlesy]

any updates on this?