Other cars used to have a device that sensed vehicle roll-over. When the vehicle rolled, the fuel pump would not work.
Sometimes the device would fail, preventing flow of gas.
Hope this helps. I no longer have a Z4M, and don't know if this applies...but thought I would share just in case.
My wife's cars
: Had a few... I'm the Navigator, capable of getting us lost at any time! Drives are longer!
Last edited by DaveL--2mnycars; 04-05-2012 at 03:26 PM.