I took my Linea for a general Second Free Service. The SA told me that they have received a circular from FIAT stating that they have to replace the Air Filter cap of all the Fiat vehicles which comes for servicing. He told me that, it is to reduce noise. (Really?? :evilsmile ) But I am not sure about his assumption. Anybody interested can go to TASS and ask for a replacement Herewith I am attaching the before and after images of Air filter cap.