2001 BMW 320 Electric leak

Tiny
ANDOORA
  • MEMBER
  • 2001 BMW 320
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
The battery on the car dies over night for no known reason what so ever. I have noticed that it dies faster on colder nights. I have recently changed the battery to a brand new one and checked alternator and starter and they all seem to be working fine. I just dont know what is draining the battery.
did anyone have a similar problem or know anything about this problem
thank you
Tuesday, October 27th, 2009 AT 7:34 PM

3 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
The fan motor final stage is suspect.
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Wednesday, October 28th, 2009 AT 9:08 AM
Tiny
ANDOORA
  • MEMBER
  • 2 POSTS
Sorry, did you mean the fan for the heating and ventaliation system or the radiator fan. I suspect that also because sometimes when the car is off, the fan turns on by itself for few seconds.
Thank you
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Wednesday, October 28th, 2009 AT 12:02 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
I believe the fan motor(the HVAC fan) final stage is the one that is suspect, they fail quite often and can cause the issues you report. Go to Realoem. Com for an exploded view, look in the 64 section.
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Thursday, October 29th, 2009 AT 9:06 AM

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