[Beemmer]

its this normal? i desactivated the automatic ventilation... i dont know whats happening but its sounds weird, it sounds like a computer (pc) fan... i hear it alot when car its off

[Spensaur]

It happens to me as well... I'm pretty sure it's normal. Hopefully someone can chime in.

[Meeni]

There's a fan under the hood you know :}

If you have a lot of radiator fan activity, very loud, your water pump is maybe close to a sudden and crippling death. You may want to have the bmw specific codes read from the computer, just to be sure you do not have a lot of "low flow" errors stored in the memory.

[isosunrise]

I hear the same fan (computer-like) noise from time to time after I turn my car off, sometimes even when im driving! From my understanding its coming from the CIC unit (CD Slot area).

I had mine replaced about a 3 weeks ago, a lot less noisy. Like a laptop, it gets hot, fans kick on to cool it down.

[Beemmer]

Originally Posted by Meeni

There's a fan under the hood you know :}

If you have a lot of radiator fan activity, very loud, your water pump is maybe close to a sudden and crippling death. You may want to have the bmw specific codes read from the computer, just to be sure you do not have a lot of "low flow" errors stored in the memory.

its not the radiators fan, its inside of the car, on the AC controllers

[Surly73]

There are lots of fans:

- radio amplifier
- DME box
- HVAC control unit sampler fan
- main fan under the hood

I don't have CIC/CCC and there is a DME box fan I've been able to hear sometimes while driving in hot conditions and it runs for a while after shutdown. Ditto with one cooling the factory amplifier in the trunk.