Turbo whistle on idle - SHould i be worried?

[Strangely Brown]

So i have had the A3 now for just over 4 weeks and painlessly covered 2.5k miles HOWEVER i have noticed a fair amount of turbo whine not Siren just a bit more whistle/whine than the other 5-6 VW's 2.0 TDi i've owned. Appreciated the car has covered nearly 90k miles so there is going to be some whistle but after 4-5 minutes of the car idling there is a slight whine/whistle that sounds like the radiator fan (in fact that is what i thought it was) and goes away if you blip the loud peddle.

As i said, i have owned 5-6 MK5 TDI Golf variants the last three have been the same engine (BKD) and this is the only one which as whined.

 

[smurfworth]

Mine is like this too, sounds like a huge boost leak on idle also sounds like a supercharger at higher revs when accelerating. When turning it off and back on again it sometimes goes away. I'm just waiting for the turbo to give in.

 

[SAiLO]

I've had that whine for at least 6-8 months now, maybe more. Turbo was replaced around 25k miles ago. No overboosting, loss of power, blue smoke or limp mode so just driving the car as normal.