Ok Ok I got ya, I also asked do I change the whole alternator or just the voltage regulator? Either way i'll be addressing that in the next day or two. Thanks.

 

http://bmwfans.info/parts/catalog/E6...em/alternator/

I didn't understand what do you mean by voltage regulator ,,, your problem is alternator , so you need to change it .. , anyway if any garage or the dealer knows how to test it on GT1 or on a normal voltage meter , but GT1 will show exactly the voltage of the alternator ..

good luck and keep us update ..

 

Ok so I replaced my alternator today and so far so very good. I'm keeping my fingers crossed hoping all my electrical problems have been solved.....

 

Make sure your battery connections are nice and tight....sounds like a loose cable to me....If that checks out, test the alternator....if that checks out, test the MPM. If you do not have access to a GT1 Diagnosis machine take to dealer and they'll tell you what's wrong with it. I put my money on bad battery connector or loose cable.

 

cool ,, gongrat. man

 

any updates?

 

Yes, replacing my alternator has resolved all my electrical issues. I've driven almost 100miles and everything is OK.... I took my old alternator to O'Reily to be tested and it failed.