Why would the fuel pump turn on when you open the drivers door?
I don't know anything about the 128i but on most cars I've looked at, the fuel pump relay energizes with the ignition. On some cars, there is an air pump that runs after you switch the car off. That pump is used to check for fuel system vapor leaks.
Last edited by Andrew*Debbie; 11-25-2011 at 06:51 AM.