Hey all, under about 50% throttle I get a very weird whistle noise, not the usual spool sound. Here's a video of the sound: https://youtube.com/shorts/i9W_SItim9o?feature=share
I don't have any underboost codes, and the car handles boost perfectly fine, however this is the only 2.0T I've heard that sounds like this. Any input? Thanks!
Car is a 09 A4 2.0T Tiptronic.
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