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Old 02-27-2018, 01:03 PM
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Join Date: Mar 2017
Location: Rockland County, NY
Posts: 60
chedeng is on a distinguished road
2001 BMW X5 5MT charging issue.

Hello All.

I bought this X5 March 2017 and one thing stumping me is the charging system (which I need help on). This vehicle is driven 90 miles/day so it gets plenty of 'charging' time.

Timeline:

March 2017: - When I got the car, the voltage across the battery was >16Volts when running . . . can't be good for the electronics.
  • I changed the voltage regulator (Bosch).
  • Put in a brand new battery. Measured voltage went down from 16V to 13.2 Volts (running) and not much more which is odd.

April 2017 - Drove the car like this for a month and noticed that my battery light on the cluster started blinking. I checked the voltage on the cluster while driving with a voltage of 11.2 volts.
  • Replaced alternator with a brand new Bosch AL0703N. No change in the voltage still reading 13.2V across the battery (running).
  • I put in a different battery from my other car but issue remains. Re-installed new battery.

May 2017 thru Present - I have been driving this car all these time and have never seen the battery light flash until yesterday.

Note: I am working on getting a replacement alternator. I will be returning the new alternator and see if I can get a replacement.

Here are my questions:
  1. Could this be a grounding issue?
  2. Where are the ground straps located on the vehicle that I can check for cuts/corrosion?
Thanks
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