What is a biofungal procedure that was done on a friend's 3 month old toyota . she was told she needed it done when she came in for an oil change!

I'm very sorry but I really don't know what that means. My granddaughter had a very bad experience with them and bought a car someplace else. That's the only comments that I could possibly make cuz I did not shop there myself. I would definitely go to another dealer and find out what that means. Also try to get some prices to make sure you weren't overcharged.

Unfortunately I have no idea what that is