The problem is, there’s no guarantee that the message will get delivered,” says Anne Thomas Manes, an analyst at Burton Group in Midvale, Utah. “It offers 92% to 96% reliability, but if you need 99.9% ...

Tesla’s newest reliability problem is not about the latest Model Y rolling off the line, but about what happens to those cars after years of hard use. A major owner survey of long-term dependability ...