BMW E60 5 Series Battery Drain — Multiple Modules
Multiple control modules on E60 fail to enter sleep mode, causing parasitic drain that flattens the battery overnight or within days. Common culprits include the CCC iDrive unit, telephone module and TPMS controller. Diagnosis requires measuring drain per CAN bus branch with a multimeter. Battery drain of more than 50mA after 30 minutes is abnormal.
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No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW 5 Series 2004 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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