E46Fanatics - View Single Post - My Battery keeps dying for no reason??
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Old 04-15-2013, 09:37 AM   #8
Registered User
Join Date: Feb 2012
Location: Pennsylvania
Posts: 25
My Ride: 02 M3 Vert
I woke up one morning and my battery in my Xi was dead, charged it and didn't think much of it.
Weeks later I went to the gas station, filled it up went to start and it was dead again. (Got a jump). I then took it to have the battery tested, it was fine.
It drove fine for weeks, then it died 3 times in a week. enough is enough, I dropped it off at the garage.
They couldn't find out what was wrong with it, took it home. Then that night around 3 am I walked past the car and the fan was running. BINGO!

Long story short. The relay or resistor went bad on the radiator fan, which cased the fan to kick on at random times and drain my battery.

2002 6MT M3 Vert
2002 5MT 325 XI
2003 Lincoln Navigator

Last edited by Qstackfield; 04-15-2013 at 09:38 AM.
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