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7 Series DIY
Do It Yourself forum dedicated for 7 Series BMW Owners

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  #1  
Old 11-26-2013, 10:33 AM
403cruz 403cruz is offline
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Location: Calgary
 
Join Date: Jun 2013
Posts: 15
Mein Auto: 2009 BMW 750I
Question 2009 bmw 750i Alternator issues???

I took my bmw 750i in for servicing because i kept having the drivetrain malfunction error along with my vehicle driving ruff as if it was misfiring at certain times, but moment the vehicle is turned off and restarted all the faults were cleared.( all sparks and coil packs already replaced). When i did a diagnostic i was told it could possibly be the alternator because the voltages are flowing up and down continuously and they are not sure why its jumping irregularly. I've been told it could possibly be the alternator as the battery is in 80 percent condition.... What do u guys think any help would be great i have already dropped a couple thousand on this issue !!!! NY HELP WOULD BE APPRECIATED !!
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  #2  
Old 12-04-2013, 02:06 PM
cybraktif cybraktif is offline
cybraktif
Location: New Orleans
 
Join Date: Dec 2013
Posts: 3
Mein Auto: 1974 Maverick
Did you ever get your issues resolved?
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  #3  
Old 12-10-2013, 03:22 PM
fratan fratan is offline
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Location: MA
 
Join Date: Jan 2012
Posts: 233
Mein Auto: 2006 750i
2009 bmw 750i Alternator issues???

You would get a code in inpa for bad generator if it is the alternator.


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2006 750 I
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  #4  
Old 12-14-2013, 09:52 AM
403cruz 403cruz is offline
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Location: Calgary
 
Join Date: Jun 2013
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Mein Auto: 2009 BMW 750I
Sorry for the late reply , I had a diagnosis done towards this problem again last week and was mentioned it was still the alternator???
No #cybraktif still havent figured it out
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  #5  
Old 12-14-2013, 10:11 AM
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SuperSnoop SuperSnoop is offline
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Location: Austin, Texas
 
Join Date: Aug 2012
Posts: 559
Mein Auto: 2007 760Li
2009 bmw 750i Alternator issues???

http://www.bimmerfest.com/forums/sho...d.php?t=363895


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  #6  
Old 01-08-2014, 08:38 PM
etone etone is offline
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Location: Toronto
 
Join Date: Jan 2014
Posts: 13
Mein Auto: 750ix
I just had something similar on my 2010. Same symptom and diagnosis. alternator is the suspected culprit was replaced along with the battery. Only got the car back today so can't say if it is the definitive solution, just that the dealership here came to the same conclusion.
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  #7  
Old 01-27-2014, 05:21 PM
403cruz 403cruz is offline
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Location: Calgary
 
Join Date: Jun 2013
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Mein Auto: 2009 BMW 750I
How is your car running after the alternator change?? etone !
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  #8  
Old 01-28-2014, 02:15 PM
etone etone is offline
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Location: Toronto
 
Join Date: Jan 2014
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Mein Auto: 750ix
So far so good. Haven't had any electrical issues (drivetrain malfunction, battery warnings) since and we've had very cold weather to boot.
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2009, 750i, alternator, battery alternator start, drivetrain malfunction, f01


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