My Prius from day one tends to get this horrible toilet flushing sound when on the bluetooth. It doesn't always happen. I mostly notice it when i am talking to someone who is also on a car bluetooth. It sounds like a combination of a toilet flushing or having a window open. Has anyone else had this issue? I'm the second owner and only have 52k (just actually had an oil change today, and forgot to ask Toyota to look at it) Second question, is there an OEM rubber cargo mat available? The Toyota dealer couldn't locate one. I tend to haul everything in my prius and would be useful for plants and dirty things. I've hauled rose bushes to a couch in my prius so far.
Haven't encountered the first issue, but as far as I know the only rubber cargo mats available are from 3rd party providers. Look into weathertec cargo mats they are great.