92 BMW overheats?

it could. Or you might have either an airlock, or a blockage.
Take the expansion tank lid off. and run the engine to temperature. feel where the hot water is going. squeeze the pipes to try to "suck" water through. Pumps dont usually go wrong in my experience, they often leak, but your talking about total failure- which is i'd have thought, unlikely.

steve
February 2010