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2005 BMW 330i ZHP Auto
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Discussion Starter · #1 ·
My 330i recently died overnight a couple times. When doing a parasitic draw test, the culprit turned out to be fuse #41, for the radio. The only modification I have is the BMW AUX input retrofit. My questions are; is the radio itself bad? What else could be causing this battery drain? Also, even though my battery is less than a year old, could it have gone bad from discharging multiple times?

Sorry if this has been discussed before. I didn't find any answers.
 

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A lead acid battery doesn’t like being fully or near fully discharged. Basically, the chemistry in the battery permanently damages the lead plates. So, you need to resolve the issue now.

How much current is the circuit using?
 
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