Well, it's been almost a year since:
http://www.buggiesgonewild.com/elect...e-problem.html
We have one cart that has the auto-brake lockup problem, and it just started doing it.
It either did not get the new solenoid (EZGo did not give us records of the ones they replaced), or a new, replacement solenoid is failing. Based on the cart #, I'm leaning toward the former, that it still has the original solenoid.