Stans

2020 RX. Started the car for the first time today put it into reverse and started slowly backing up. And as it was moving I heard a weird humming noise. Didn't think much of it and shifted to D and drove away. Later that day the same thing hapenned again after it sat for couple of hours. The first 10-15 seconds of slow driving in reverse or drive sounded really weird. After that all the noises dissappeared and could not reproduce it. Any ideas?