Quote:
Originally Posted by Desmo85
Well you could run into problems.....newer BMW´s have the so called IBM (Independent Battery Management) which is kind of a registration of the battery to the car. Meaning that in worst case your car would not recognize your battery when you reconnect it, and would not load energy in it while driving. You would however get a warning in the dashboard if it fails to recognize the battery.
It happend to me with my 530D when I changed the battery (damn you programmable park heating)I had to go to the dealership which had the battery registrated and of course charged me for it.
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I am pretty sure that once programmed to a battery that is the only thing you need to do. The only thing i can think of from there is if the battery while disconnected goes out of tolerance in Voltage or Amperage and does not recover after a charge.