Hmmm I first noticed how quiet the brake was on the 2007 compared to my recently totaled 2008. The fluttering sound behind the dash was missing as well. The 2007 was driving extremely erratically at first but a new steering rack and new KYB struts fixed that. I had no idea my 2008 was making noises that were irregular until it was totaled and I had the chance to drive another one. I bought the first Prius I drove and now I’ve driven two. So much more knowledge ha ha
