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Old 01-08-2010, 11:37 PM   #7
2nd Gear Member
Join Date: Mar 2007
Location: Ontario, Canada
Posts: 169
Originally Posted by Dado 540 View Post
I have replaced the battery 2 years ago. Haven't had any problems,but im gonna have to check it. E39 are sensitive to the battery that is not fully charged.

Im reading up on this on other forums and people are suggesting General Module, Voltage Regulator, Alternator, Battery...

I forgot to mention that RPMs tend to dip on a rare occation.
I had the exact same symptoms. In my case the problem was alternator. I however let it continue with these symptoms for too long and it in turn killed my battery too... although my battery was original if I am not mistaken - 6 years old.
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