http://priuschat.com/forums/newbie-forum/73400-weird-stuff-happening-mpgs-dropping-test-battery.html And get a copy of the Owner's Manual for your car's year.
I'll have to check the Warranty Book on my 2004 when it gets out of the shop. It is in for broken steering AGAIN.
OK, according to my 2004 California Prius warranty book : Hybrid Vehicle System: 8 years; 100,000 miles Hybrid Battery Pack: 10 years; 150,000 miles Emission Control Performance/Defect: 15 years; 150,000 miles However, that last one is probably a boilerplate entry for Toyota vehicles; my Prius is smog-test exempt since it can't pass the idle test as the Prius DOESN'T idle, but shuts down.