Noise from the air intake

[Gregski]

2.0 TDI - Is this normal sound when lifting off the accelerator? For me it comes from air intel / air filter ?

[FMOB]

Definitely terminal, I think the gangle pin in the giggle box hiding under the air filter is shot.

Only fix is to scrap it, sorry to be the bearer of bad news.

Am I doing this right?

[Optimus]

Really hard to diagnose over the video.

It might be bearings on the turbo. The sound normally is a hissing-rattle sound more noticeable as the turbo looses pressure the slower rotation causing radial movement of which if the bearings are going/gone the sound becomes more pronounced compared to a high pitched hissing/whistle which sometimes we can’t hear because it’s higher frequency or mistake it as air suction.