Curious as I've always resented the 'warranty' because it meant I couldn't make mods until it was over. I do buy my own maintenance manuals(*) and revel in doing the work. For example: Adding 1.1 kW inverter to 2003 Prius Adding 2.5 kW inverter to 2010 Prius Optimizing tires on 2003 Prius, not the standard size Microcontroller for 2003 Prius to reduce cold weather running of engine Replacing transmission vent plug with tubing to air cleaner, clean side Upgrading traction battery to use more modern modules Verified we can rehydrate Prius modules and achieve greater than new capacity Replaced rear view mirror with combined GPS and rear camera Used shims to achieve perfect rear wheel camber and toe Used camber bolts to achieve perfect front wheel camber Replaced backup light with one that has an audio beep Replaced passenger seat with a 'nap' board Added 2" receiver hitches to every car Multi-year, multi-car transmission oil study Plotted the mph vs MPG for every car Performed 'out of gas' study on every car we've owned Drive using dynamic cruise control on every car in all traffic Conducted vortex generator study of 2003 Prius (sedan body) Used pressure caps on cars without tire pressure sensors Towed 2,000 lbs of trailer and load 600 miles through a Nor'Eastener Extensive use of OBD diagnostic interfaces Modified BMW to use European style settings . . . Check for bwilson4web in PriusChat.com, the Yahoo Group "Prius Technical Stuff", and the BMW owner's forum. Older, there are entries in GreenHybrid.com and Ecomodder.com. I prefer to build on the shoulders of Giants ... not their toes. Bob Wilson * - today it is a technical service, online.