[DuaTTro]

Hello everyone,

My 2009 Hyundai i30 CW 2.0 CRDi 103 kW has strange hissing and rattling sound from air intake when decelerating (after acceleration).



It appears when engine warms up a little bit and it does not matter which gear is used. I have been driving with such noise for about 1 year and it is annoying.

Could any presumptions be made what might cause such problem? Thank you in advance guys.