My 2015 WRX (26k miles) is making small rotating in motion sound from driver side front when car is moving (either in gear or not in gear) I first thought that the noise was coming from the front wheel...so the Subaru dealer checked all of my wheels, brakes, bearings and they were fine. While I was at the dealer, the mechanic couldn't identify the noise when I kept pointing out. I'm not 100% sure where the noise is coming from but I have a vague sense that it's coming from the firewall. The noise sounds like a wheel spinning really fast WITHOUT metal grinding, humming, or friction sounds.....that's the best I can describe. Also I wanna point out that I have group N transmission mount installed and engine guard has a small bent from scrape. Can one of these be the reasons why? I'm really confused.