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E60 M5 (2006 - 2010)

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  #1  
Old 07-08-2013, 04:15 PM
zhthomas zhthomas is offline
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Mein Auto: 2008 BMW M5
2008 M5 Serious Electrical Issues

In the last 4 months, I have experienced serious electrical issues with my 2008 BMW M5. The mileage is approximately 24,500.

The problems started in February with the brake, DSC, and start off inactive lights coming on. The local BMW dealer diagnosed the problem as an alternator, and it was replaced. A month later I noticed the clock was losing time, and the keyless door entry worked sporadically. The same dealer diagnosed the problem as a weak battery, and it was replaced. Everything was okay for the next two months. Then the DSC and start off inactive lights appeared again. Returned to the same dealer. This time the dealer diagnosed the problem as a DSC hydro unit failure, and it was replaced. Now, a few weeks later, the following lights come on intermittently: DSC malfunction, DBC malfunction, start-off assistance inactive, and dynamic damping control malfunction. I have not gone to the dealer yet, but will certainly be curious as to the explanation now.

Has anyone experienced similar problems? I owned the car for 1.5 years without any problems and all of a sudden its problem after problem since February. Thankfully, I have an extended warranty.
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  #2  
Old 07-15-2013, 06:47 AM
zhthomas zhthomas is offline
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Mein Auto: 2008 BMW M5
Follow-up

For those interested, the dealership says that the faults are now being caused by the SZL control unit which is the steering angle sensor.
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  #3  
Old 07-15-2013, 11:25 AM
fdriller9 fdriller9 is online now
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Valid reason. On xdrive models, after a battery disconnect, these faults (DSC malfunction, DBC malfunction, start-off assistance inactive) come up and don't go away until you recalibrate the steering angle sensor by turning the wheel lock to lock.

Hopefully this resolves your issues. Next I would guess the ABS sensors in the wheel hubs.
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  #4  
Old 11-11-2013, 06:41 AM
Baramack Baramack is offline
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Mein Auto: 07 m5
2008 M5 Serious Electrical Issues

I have had similar issues. Dsc malfunction, abs malfunction, servotronic malfunction, and most recently lost all power to dash when turning car off. Had to reset clock, etc. they each happen randomly when driving. All coming after completely turning car off then back on. what to do?? I am lost. Please help!


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  #5  
Old 11-11-2013, 06:42 AM
Baramack Baramack is offline
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2008 M5 Serious Electrical Issues

Sorry, they all come back after turning car completely off then on.


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  #6  
Old 12-06-2013, 12:58 PM
undercover undercover is offline
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Mein Auto: f10 m5 996tt
contact my guy ron at performing imports down there outside of atl he will know how to fix anything electrical on the m5!
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  #7  
Old 03-08-2014, 12:06 PM
patrick_y patrick_y is offline
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Thank goodness for that extended warranty, although it does really seem that the dealer might be mis-diagnosing some things (not all, but potentially some). Just hard to imagine that the car would have so many problems. I've hear of cars out of Hurricane Katrina or floods that didn't have quite as many problems.

Last edited by patrick_y; 03-08-2014 at 12:13 PM.
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  #8  
Old 03-08-2014, 12:30 PM
jrsnider92 jrsnider92 is offline
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Location: Erie
 
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Mein Auto: 2006 BMW M5
Quote:
Originally Posted by Baramack View Post
Sorry, they all come back after turning car completely off then on.


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I had this issue and it turned out to be my alternator. After they replaced that, everything was great.


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