Just spoke to my dealer Scion Buena Park. The parts guy was the only one who could give me some answer. When he checked his system for a part number, he got the same message about the cooling system. But he said he couldn't imagine how it could cause a problem. Which leads me to emphasize that it's important to put the filter in the correct direction so that the air flows freely.



He also mentioned that he's seen it before (he used the Toyota Highlander as an example) where one year the system had the place for the air filter but it wasn't installed and no mention of it was made to the public. The following year it was suddenly standard when all along it was there. He said that it's possibly the case with the tC as well. That if there a response to it, it will be installed in the next cycle.



I did call Scion directly but I hate to say it, they don't have a clue. They told me it was an option and I could buy the filter at the dealer. The rep also said I should call another dealer to verify the information about the 'possible issue'. I don't know, I just don't see how there could be a problem.



Anyway, if you want to get a filter from Scion, it's $25... it's the filter from the xB. Probably been mentioned before but just in case...



All I can say is that my air is way cleaner - especially driving out here in smog filled SoCal.