[seneca]

The biggest concern I've heard for hybrids is lifetime maintenance cost. You have both the legacy ICE and transmission, as well as electrical components to maintain. That's a major hypothetical disadvantage to all electric.

Does anyone have numbers for this?

[twblalock]

Toyota Priuses have been sold for over 20 years (closer to 25 actually!) and they are very reliable. There are Prius taxis with half a million miles on the original battery.

[jointpdf]

This is a great site for long-term reliability data on many cars: http://www.dashboard-light.com/vehicles/Toyota_Prius.html. The Prius has the highest reliability score of any compact in their list.

This explains where the data and scores come from: http://www.dashboard-light.com/click-here-first/