Electric motor whirring when car is parked

I'm sure somebody here has the definitive answer for you, but I gave up trying to figure out what all the new sounds were real fast.

 

Battery fan? The key issue is it stopped (or cycled).

FWIW, the electric radiator fan on the roadster does same by design, after a thrashing.

 

It appears you have a Liftback, not a 'v'. If so, you posted to the wrong forum, but then I also have the same car as you, so any different function of the 'v' doesn't apply.

About five hours after the last trip, the evaporative emission control system fires up a fan for a few minutes. It is normal. Somewhere in the manual is a list of this and numerous other unfamiliar sounds you may hear.

 

A common whirring sound is the brake booster, the one that also comes on everytime the driver's door is opened. It also happens a few minutes after the car is shut down.

It usually lasts only a few seconds though.

SCH-I535

 

No. For safety to mechanics and emergency responders, the main battery is disconnected by a relay inside its own case whenever the ignition is turned off. If the 12V then falls too low, it must be jumped from outside, or replaced, before the main battery relay can be switched back on.

 

I heard this same whirring noise a long time after the car was stopped too. Glad someone has an explaination for this. In another unrelated post, I actually walked into the garage this week and noticed the interior map lights turning off on after being about 2 meters away from the car. I opened the door and made sure I didn't accidentally have them switched on somehow...after tripping checking, I shut the door and they dimmed and turned off...weird! it's like the car was welcoming me.

And no, I did't have the smart key with me too.