main computer

do a search on replacing the battery on your car and not having it registered to your car with a special scan tool.it has to be registered to your car,or it will assume the other battery is still in it and not send out the correct voltages to each component,possible killing them.also it has to be an AGM type battery.most who replace battery themselves,do not know this.factory BMW battery last 7-10 years.if new battery is not registered,most likely it will not last more than 1 or 2 years. also should hook up battery saver,before removing battery to hold presets.note at autoparts(AZ)that sells your battery as follows.Part Number: H7-AGM:IF DEALER INSTALLED YOUR BATTTERY,THEY SHOULD HAVE REGISTERED YOU BATTERY TO YOUR CAR. Warranty: 3 YR Notes: *** 800 Cold cranking Amps (N/A cranking Amps) ***. 140 reserve minutes. Warranty consists of 3 years free replacement. STOP!: Use a memory saver (located in the store GOTTChA kit) to prevent the need to reset vehicle systems. Battery gasses need to be vented to outside. Contact your service specialists.