My 2003 Audi A4 makes a sort of wissling whining kind of noise when I step on the gas, it's not very loud but I can hear it and that bugs me. Does anyone know what that is??

um how bout the turbo? is yours a 1.8T?

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-2005 A4 USP Ocean Blue Pearl FWD 1.8T 5-Speed (1 of 9): Falken FK452/K&N 33-2209 Drop-In Filter/NGK BKR6E Plugs/APR Stage 1 (Fall)/Forge 007 (Fall)/Spacers (Spring)-

-2005 Audi A6 Allroad 2.7T Auto: 20mm Spacers

Yeah it's a turbo, I noticed it's not as loud once the car warms up.

Turbo?

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Yeah it's a 1.8 Turbo, is that what it is?? I just want to make sure i don't have to worry. Cause my mechanic says that's it's in perfect condition but when I heard that whistle it kind of concerned me.

perfect condition. mine does the same thing, as do all turbos. Even the new VW Gti's do the same thing, since its the same engine just bumped up in displacement. (2.0T). You have nothing to worry about, I in fact kinda like the sound of the turbo

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-2005 A4 USP Ocean Blue Pearl FWD 1.8T 5-Speed (1 of 9): Falken FK452/K&N 33-2209 Drop-In Filter/NGK BKR6E Plugs/APR Stage 1 (Fall)/Forge 007 (Fall)/Spacers (Spring)-

-2005 Audi A6 Allroad 2.7T Auto: 20mm Spacers

No offense but was this a serious a question? or were you just kidding around about this...

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02.5 A4 1.8TQ
-I've done some shit to it