I've got a 2021 CX-9 GT, I was out road-tripping/camping with the family the last couple weeks and noticed when we were in outdoor temperatures of 100F+ there seemed to be noticeably more whine from the turbo when the car was accelerating in 1/2/3 gears, not an excessive amount of additional noise, but definitely an 'I haven't heard it make that sound before' amount... Once we got up about 30-40mph it was no longer noticeable due to regular road and wind noise. The car performed normally otherwise, no errors or issues, I checked the oil level and it was good/normal (just below the max line where I'd topped it off to after getting a low level warning about 6 months ago), coolant level was good also. When we were up in the mountains and the temps were in the 80's, no additional noise and it sounded like it usually does when driving around town unloaded, but whenever we were lower and the temps got up to 100+, it would return.
I'm probably just being paranoid, it's probably normal/fine, going in for its first oil change next month and I'll ask the techs about it then also, but figured I'd check here just in case.
I'm probably just being paranoid, it's probably normal/fine, going in for its first oil change next month and I'll ask the techs about it then also, but figured I'd check here just in case.