Weird weird noise

[jackh707]

Anyone else have this?

Sitting in my 2012 E91 320d

Been driving, then stop, engine off and sit quitetly in the car for 2 or 3 minutes, (listening to radio or just early).
About 2 minutes after switching engine off there is a noise that sounds just like a ships foghorn in the distance.

A monotone sound.
Lasts for 5 seconds, then a subtle mechanical sound then it stops.

What is it?

I know it's part of the normal function of the car but I'm just wondering if anyone knows.

[Triumph Man]

Electric fan?

[Silverbullet767]

Mine does this too, thought it might've been the fuel pump priming or something.

ETA: Just googled it, might be the AC inlet flaps closing.

Edited by Silverbullet767 on Thursday 7th September 16:21

[Locknut]

Silverbullet767 said:

ETA: Just googled it, might be the AC inlet flaps closing.

Edited by Silverbullet767 on Thursday 7th September 16:21

I have heard it too and it has to be something closing down.

[jackh707]

Thanks all, glad I'm not mad.