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      12-14-2012, 01:17 AM   #1
Missionpeak BMW
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Battery Problem - Won't start car after 4 or 5 days sitting parked

Have a 2001 530i sport/premium/manual- runs great- however I've notice I have to jump/charge the battery when I don't start the car after 4 or 5 days. Battery is 2 years old. No other start issues. Any thoughts would be appreciated.
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      01-12-2013, 09:43 PM   #2
cdmulders
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I lived this exact scenario with my E39. It turned out to be an electrical drain on the battery caused by a malfunctioning electric fan. While this may not be the exact cause of your problem, I would suspect a short or unexpected drain on your battery. Troubleshooting may find the problem - check the draw on your battery and start eliminating circuits one by one until the circuit that is draining your battery is identified.

Good luck!
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      01-29-2013, 06:45 PM   #3
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Quote:
Originally Posted by Missionpeak BMW View Post
Have a 2001 530i sport/premium/manual- runs great- however I've notice I have to jump/charge the battery when I don't start the car after 4 or 5 days. Battery is 2 years old. No other start issues. Any thoughts would be appreciated.
It's your FSR (Final Stage Resistor) Pack located under the dash. A bad FSR causes your heater fan to slowly cycle on and off at low speeds when the car is off leading to a dead battery in a few days. BMW redesigned this part some time ago. This is a common problem for the E39. Replace it and your problem will be solved.
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