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Disconnecting Battery

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. DO NOT disconnect battery leads and leads from alternator and starter motor while engine is running.
  2. There is a danger of mixing up battery leads. If battery positive and negative leads are the same color, follow the polarity to the battery. Then mark and cover leads.
  3. On vehicles with radio code, radio code must be re-entered after connecting battery. Obtain radio code card from customer. Make a note of stored stations. Stored setting of on-board computer and clock will be lost.
  4. Detach terminal of battery negative lead from car battery and secondary battery, if fitted. DO NOT pull lever off pole shoes by force. DO NOT remove socket-head cap screw of IBS. Cover battery negative terminals and secure.
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