The unknown hum?

[johnnydee]

I recently purchased a 2019 MS 100D and am experiencing a similar hum or vibration.



The 1st time the vibration occurred, I was supercharging and the hum remained after charging for approximately 5 minutes. The 2nd occurrence I was about an hour into my drive, and again without any related input from me, it started humming again.

Outside air temps were about 80F and definitely, not driveline related.



Any idea what may be causing this?



Thanks

 

[DerbyDave]

Likely the coolant pump to keep the battery cooler while supercharging. It will continue until the battery is in a more stable temperature range. The A/C compressor will also be running, but the interior cooling will only be on when the door is opened or while you are inside.