Not saying it's fact, but it could be construed that Corollas are less reliable than Volts. It could also be construed that Corollas are driven more often, or for more miles or that there aren't that many Volts in your area. Based on what I've seen, I see ICE vehicles on the side of the Interstate, not PHEV's or EV's. Yes, it's totally possible they break and maybe they even break more, but that chart has no source to check. What was their basis for saying PHEV's and/or EV's were less reliable? Empirical evidence? Is it because there are more parts on a PHEV vs. an ICE so they just assume there is more to break? Not saying there isn't, cuz there is, just saying from my experience and from what I've seen I'm wary of some random albeit pretty, chart making claims about reliability.