All the 2000 528i battery powered Master Ignition Keys are going to poop
right now along with mine.
For the 2001 owners, you have about 9 Months more operation service from
your Master Key to fog the doors locked and turn on the Security System.
At Hansel BMW they are very hush hush about how things work, as it makes
them money for an emergency tow haul into the shop.
At 185,000 miles for me at 9 years post production for my 528i, the car
just stopped running, and fortunately I was at a stop light when that
happened. No Restart .. no Codes.
Maybe the computer sorts that out that way, if any of you lose your
ignition fob battery at highway speeds where your engine shuts down do
post here please.
What has happened I propose is when the Master Key battery runs out, the
Security System feaks out as the ignition is in the key slot
improperly placed there.
SO THE FIX is this when EVER your BMW shuts down this way.
Pull the vehicle to a safe place if you can.
Dismount the vehicle.
Check the fob for locking the system as it might be working, and then
relock and unlock through the door lock several times.
Once the Master Key gets into the door lock mechanism, showing the
computer security sytem that it is the proper key however with the dead
battery inside and that then is in the ignition ... so far it is working
I have ordered up the new Master Key from BMW, about $200 and several
days ... maybe ever one day.
Have to see.
So folks, keep it in mind, and maybe it will save you a car tow to the
shop just to find everything is all right and no codes a poppin.
sumbuddie hopes this helps
PS ... did change out the fuel pump ... and the car is a lot more of the
sprinter with a light peddle .. new car feel to it.