BMW 3 Series Battery Reset Procedure, Setting Time and Date, Description of Battery Problems
A battery reset on a BMW is used to reset a computer also called a control moduule that may be malfunctioning. A common component that can lock up is the TCU or telephone control unit. Peforming a battery reset can sometimes recover the module. Also describes some symptoms relating to a battery problem.
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How to replace the battery on a BMW 5 series F10. I also describe the procedure for performing a battery reset which can correct electrical problems or reset a control module.