250,000 Miles as of September 24, 2011! New 2005, purchased February 2, 2005. Transaxle flush every 100,000 miles by Toyota; New O2 sensor at 6,000 under warranty; New front driver side wheel bearing at 105,000; Oil changes once a year with Amsoil; New from brakes at 225,000 miles; New plugs at 240,000 miles; Only problem is that the car will NOT pass smog as two sensors in the coolant system are not functioning. One of them is the sensor in the coolant thermos bottle. Will probably be about $1000 to have Toyota fix both! Would really like the old tailpipe test right now. It's ridiculous that a Prius won't pass just because the coolant sensors are bad! 12v battery is original and needs replaced but still works. HV battery is noticeably weaker, fuel economy has dropped from 42 MPG to about 35 MPG. Partly due to more AC use in Vegas. Now burning about a litre of oil every 2,000 miles. I've used the car hard. I regularly tow dirt bikes and street bikes and almost always have a bicycle on the hitch rack. Trying to hit 300,000!