To me, it's surprising that a hybrid vehicle would be the most reliable given it couples an entire ICE drivetrain (inherently unreliable in its own right) with

To me, it's surprising that a hybrid vehicle would be the most reliable given it couples an entire ICE drivetrain (inherently unreliable in its own right) with an electric system. I'm assuming Toyota appreciated the risks and put effort into using higher-reliability components into their hybrid cars - especially as the Prius brand could be devalued quickly if it ever developed a reputation for poor reliability.