[badass1g]

my car makes a very quiet sound from the dash mainly only can hear it when car is in reverse or drive mostly and at a stop. to best way i can explain it is it sounds like a horn from a car alarm (a VERY quiet one) if i just turn my radio on a little i cannot hear the sound over the radio. anyone know what this sound could be? its on an 07 335i. thanks

[07E92TT]

just noticed the same thing on my car, its very weird

[JC316]

I hear a similar noise except it's coming from the trunk. The sound comes from the left hand side of the trunk under a small panel. It sounds like an alarm that you hear in the game Command and Conqueror to indicate that a nuclear strike is about to happen or something.

[D.B.S]

Originally Posted by JC316

I hear a similar noise except it's coming from the trunk. The sound comes from the left hand side of the trunk under a small panel. It sounds like an alarm that you hear in the game Command and Conqueror to indicate that a nuclear strike is about to happen or something.

LOL... the Original C&C or one of the newer offshoots?

Back to the topic, Yeah I hear the same sound on mine (08). I never really paid any attention to it, until my mother who was in the back seat mentioned it... "what's that noise, it sounds like a very quiet horn?" Me "I dunno, i never noticed before, I always have music playing."

It sounds like morse code or something...

[taliesen]

If it is a fast series of short noises, it could be your cell phone creating some interference. This is more likely if you have a blackberry or smartphone than a 'regular' cell phone.

Just a thought . . .

[BMWinNorthdakota]

Originally Posted by JC316

I hear a similar noise except it's coming from the trunk. The sound comes from the left hand side of the trunk under a small panel. It sounds like an alarm that you hear in the game Command and Conqueror to indicate that a nuclear strike is about to happen or something.

Best description

And yeah I get it too... when the car is at idle and everythings silent

[badass1g]

well wtf that is kind of stupid that all of our cars have an annoying honking sound. i wonder if a brand new one does the same. sooo annoying now that i know its there.

[taliesen]

I can honestly say I've never heard this in my 09 - but I never actually use the radio, it's always hooked to the iPod. You might want to note what electronics you're using when you notice it - it could be something to do with a specific set of options/equipment in your car.

[Hasek9339]

Do you have Comfort Access?

Maybe its related to that

When get in my car in the morning I hear this electronic type noise and I think its from the CA recognizing that the Key is in the car so that I can hit the start button?

just a thought

[lonestar22]

if your talking about the constant humming sound its the fan to the logic7 amp. look under the plastic panel on the left side of the trunk and u will hear it. you can also feel it in the driver quarter panel

[JC316]

It's not the fan. I hear that too. I can hear it start a little after I start my car. The horn/beeping sound only happens once in a while. I usually have my music on too loud for me to even hear it but once in a while the sound get's really loud(not over my music loud but when everything is quiet) and I can hear it even after I turn my car off. I've read that it takes a while for all the electronics to completely shut down sometimes. I figured thats what it was. Just like a computer with lots of processes running does. Although it's annoying I really don't mind as long as the car is fine.

[badass1g]

i dont have the logic 7 system and its not a constant sound. its off and on off and on. i have turned off my heater and radio, still does it.

[carve]

Yeah- the distant fog-horn sound. My 07 has it, too. It bugged me for the first week and now I don't even notice it (and I have sensitive ears- I can hear it even with the stereo on). Not sure what it is. Water pump? Maybe the LP fuel pump, if it has an accumulator instead of a return line.?

[chazzz]

I do hear some strange sounds while sitting idle at the red light traffic. Because of my limited hearing, but I heard the sounds and couldn't tell where it came from. It's freaking me out. I looked around to see if there is any cars nearby me, but I don't see.

I have a Logic 7 stereo system.

[D.B.S]

Logic 7 here, no comfort access here, still hear it... With or without my IPOD hooked up, also have my phone BT to the car, but I still hear it whether the phone is there or not... How does something so inconsequential become a big deal for us? I think our best bet is to just ignore it... But it definately is annoying when the music is off.. Ah well, no matter, the car ain't gonna explode is it?

[badass1g]

not really a big deal. but you wouldnt think that we always need to have the radio on to mask an annoying sound in our BMW. i mean its not like they are 20 year old turds.