Hard to answer the question because "reliable" means different things to different people. Infotainment system keeps dropping Bluetooth connections? "Unreliable." Engine seizes at 70 MPH? "Unreliable." Car only has minor mechanical problems, but dealers can't get parts for months? "Unreliable."
A car is too complex a thing to be characterized with a single scalar value.
A car is too complex a thing to be characterized with a single scalar value.