an interesting thread, especially as I am looking to buy an IS300h that will be averaging 50K a year.
I currently run a 3rd gen Prius that now has 160,000 miles on it and is still going strong, I have had that 2.5 years and put about 125,000 miles on it, most of it town and fast A road driving.
The only things I have had to do aside from servicing are a transmission fluid change at 100,000 miles, a set of discs all round at 155,000 miles, two front shock absorbers last week and every 50k miles I replace the EGR cooler as these block up and can cause head gaskets to blow.
If the IS300h is using gen3 technology then its fair to say it will be bullet proof, does anyone know if the 2.5 IS engine is a derivative of the Prius 1.8 or is it a whole different engine?