2004 E83 Humming Noise

[JasonShell]

Hi, When I put key in the on position, all kinds of noises coming out of engine bay, eventually most of them stop, only one soft humming noise keeps going, wonder what is it. Thanks.

[Court M3]

Mine does that at turnoff for a couple seconds. Far as I know it was normal.

[mandd]

It is the throttle actuator, and the sound is normal.

Hi, When I put key in the on position, all kinds of noises coming out of engine bay, eventually most of them stop, only one soft humming noise keeps going, wonder what is it. Thanks.