Powertrain and Technical Discussion
This info was originally posted in this thread:
https://www.ioniqforum.com/threads/2020-ev-whirring-noise.36054/page-4#post-533869
But I decided to start a new one, because it is about the 28 kWh IONIQ (2017) and not the 38 kWh (2020) IONIQ so that things do not get messed up in the Forum.