Battery Problem - Won't start car after 4 or 5 days sitting parked - BMW E39 5-Series Forum

Missionpeak BMW · 12-14-2012, 02:17 AM

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.

cdmulders · 01-12-2013, 10:43 PM

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!

DrAV · 01-29-2013, 07:45 PM

Quote:

Originally Posted by Missionpeak BMW

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.

12-14-2012, 02:17 AM	#1
Missionpeak BMW Registered Drives: 2001 530i. 2009 335i. 2009 X5 Join Date: Nov 2012 Location: Nor Cal Posts: 1 iTrader: (0)	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, 10:43 PM	#2
cdmulders Private First Class Drives: 2013 535xi Join Date: Dec 2009 Location: Ottawa, Ontario Posts: 159 iTrader: (0) Garage List 2013 BMW 535i xDrive [0.00] 2000 528i [4.00] 2010 E89 Z4 sDrive35i [4.50]	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! __________________ 2013 535xi, Carbon Black, beige interior, M Sport package, HUD, DDC & ARS 2010 Z4 35i, Crimson Red, beige interior, 6sp manual, Adapative Suspension 2000 528i, Cosmo Black, beige interior, Sport package (retired)

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