There’s a thing called HALT/HASS. HALT stands for highly accelerated life testing. Basically you put a product under extreme stress and try to find the failure points and mitigate them. Temperature, vibration (simulated or track), humidty, power cycles, … That said I’ve never seen one find everything. You can also do FMEAs, which again never find everything. In short this stuff is hard even for companies that presumably have lots of experience to draw on. Don’t know if Ford did something dumb to miss this or it was just one of those, “oops we missed it” that happens.