AudiQ5sleeper

dealer did this with me in the car.

Redd

I'd call the turbo inaudible. And when you tell a shop "there's a noise" it always pays to actually go for a ride with the tech, so you can say "That's it, do you hear it?" and make sure they know which noise you mean.

Note for folks who never touched a tire: You should adjust tire pressure when the tires are "cold", the car has not been used for a couple of hours. And tire pressure will change about 1 psi per 10*F change in outside temperature. And just in case you let out too much air...you should be doing this where you have a way to put more in.(G)

The tire pressure pumps at gas stations can usually be set for a specific pressure, and they will stop pumping when they reach it, which makes life easy and keeps all four consistent. You can also buy "smart" tire inflator pumps for $30-40 that will plug into a power socket in the car and do the same thing these days. Much easier than trying to match all four manually.

AudiQ5sleeper

definitely have a ride with the tech. you can hear the turbo spool if you listen carefully. its not that loud but it can be heard from the outside. Lets see what the OP comes back with. I had the hum before. it came down to a bad wheel bearing only 6k miles on the car when it was changed. lol

Dalancroft

I definitely hear my turbo whine. It's pretty high pitched and not that loud, but clearly audible. Of course, all one must do is crank the radio to cancel it out!