Battery Dead after car was sitting for a few days 2003 E46 325I

[lionfish37]

Hey guys having a weird issue with my battery. Its a new battery and if the car sits for a week in the garage it will be dead. Took the battery back to the interstate dealer and they said it
was fine. Nothing on in the car, no lights or anything. Did the alternator test and 12 at startup and 14 when running. Any idea's? Thinking has to be the battery? Recharge and same thing.

Thanks

[MarcoZandrini]

Your car has a parasitic power drain. The usual suspect is the final stage resistor (FSR). That part is used by the climate control to control the heating/AC fan. Search this forum and E46Fanatics. Also, check to see if the electric engine cooling fan (manual tranny: between the engine and the radiator; auto tranny: in front of the radiator) runs after the engine is shut off.

[lionfish37]

Thank You

[MarcoZandrini]

You're welcome.