Case in point: We are a Toyota family. We own 3 excellent Toyotas: an '86 Camry (mine, whee!), an '01 Sienna and an '03 Corolla. None of them has ever had anything major go wrong, and the Camry even has almost 400,000 miles and is going strong.
Now, a guy in one of my classes has had a different experience with Toyota. These normally excellent vehicles failed for him and his family. They had I think a car and a truck, and neither worked properly (I don't remember any details, but I'll ask him). Just goes to show that even the highest quality, most reliable vehicles sometimes encounter problems.