S4tund8

Drove around for the first time w/o the radio on and I hear a slight whistling noise as the rpm's rise...could be the turbo spooling, but is this normal for a stock 1.8T? I have never heard this noise before! Sounds a little metallic....

cyberluggage

It'd be cool if it was the turbo, but it sounds like the compressor. Try turning your climate control completely off and see if you hear it.

Toronto B6 -OnEighty

It's not metallic though, just sounds like a whine or a whistle.

When you floor it you can hear it the most at low rpms.

A4-Freddy

No one on the board was ever able to help me identify it, I'm not sure if it's normal or not. I've gotten used to it now. I've been meaning to go test drive another off the dealer lot and see if I notice the same thing.

Check my old post below to see if anything rings a bell for you. I'd be curious to know.<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/61427.phtml">https://forums.audiworld.com/a4gen2/msgs/61427.phtml</a</li></ul>

EdP

turbo

Avantorama

That my friend is the sweet sound of the turbo.

SVAudi

Ok, if it's whistling, it's probably turbo whirl. If it's more metallic sounding, like a light rattle, that's something loose. I had a problem with that on my 1.8T between like between 1500-2000rpm on acceleration. Turned out to be something loose. Covered under warranty and the dealer replaced something...can't remember what it was.

dxb

Windows down, no radio, in a quiet parking lot.
Stomped on the gas and heard (i think) the turbo spool up. Repeated (several!) times.

Very well insulated (acoustically) to the cabin - any road noise, radio or closed window seems to damped it completely.

Moonrokk

K03's are barely noticeable (audibly),,, but K04's make beautiful music!