b. don't remember, plus I got other stuff done at the same time.
e. occational spirited driving
Car over heated, that's how I knew. My friend, who is my mechanic hooked it up to a power supply. The water pump blew the fuse in the power supply several times.
I had an e34 525i with a m50 motor, where we had to deal with exploding and disintegrating impellers in the water pump. Now with the electrical water pumps, it's just them failing all together. Just can't win...
Btw... My friend's dad owns an e60 530i. Water pump died at around 50k miles.