Alternator issue possible

zgood4u · 12-06-2018, 04:11 AM

I'm getting the 4 light cluster display that denotes an alternator issue, codes were read and there are voltage spikes. The question is this only happens when the outside temp is in the 40's and below and it's intermittent for about 3-5 minutes (limp mode for about 2 seconds each flash of the lights). After the car warms up it doesn't happen again. Is this something anyone else has seen or had happen before?

garz747 · 12-06-2018, 04:40 PM

How old is your alternator belt and tensioner?

zgood4u · 12-07-2018, 04:30 AM

As far as I know still original.

Andyh1 · 12-18-2018, 10:32 PM

Just went through something similar... I will be replacing the alternator next month. I posted a thread on it not too long ago here

GuidoK · 12-19-2018, 02:51 AM

Without the codes one cant say anything sensible about this.
Describe the voltage spikes and how you've measured these.

12-06-2018, 04:11 AM	#1
zgood4u Second Lieutenant 494 Rep 240 Posts Drives: 06 Z4MC BSM Join Date: Apr 2011 Location: Alpharetta,GA iTrader: (0)	Alternator issue possible I'm getting the 4 light cluster display that denotes an alternator issue, codes were read and there are voltage spikes. The question is this only happens when the outside temp is in the 40's and below and it's intermittent for about 3-5 minutes (limp mode for about 2 seconds each flash of the lights). After the car warms up it doesn't happen again. Is this something anyone else has seen or had happen before?
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12-06-2018, 04:40 PM	#2
garz747 Captain 286 Rep 679 Posts Drives: 07 Z4MC 01 330i 18 X3 M40i Join Date: Jul 2015 Location: Toronto iTrader: (0)	How old is your alternator belt and tensioner?
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12-07-2018, 04:30 AM	#3
zgood4u Second Lieutenant 494 Rep 240 Posts Drives: 06 Z4MC BSM Join Date: Apr 2011 Location: Alpharetta,GA iTrader: (0)	As far as I know still original.
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12-18-2018, 10:32 PM	#4
Andyh1 Second Lieutenant 115 Rep 232 Posts Drives: 2006 Z4M black saphire / imola Join Date: Jul 2017 Location: Houston Tx iTrader: (2)	Just went through something similar... I will be replacing the alternator next month. I posted a thread on it not too long ago here
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12-19-2018, 02:51 AM	#5
GuidoK #buildnotbought 10855 Rep 4,893 Posts Drives: Z4 3.0i ESS TS2+ Join Date: Jul 2012 Location: Tinkering in the garage iTrader: (0)	Without the codes one cant say anything sensible about this. Describe the voltage spikes and how you've measured these. __________________ Z4 3.0i \| ESS TS2+ supercharger \| Quaife ATB LSD \| Brembo/BMW performance BBK front/rear \| Schrick FI cams \| Schmiedmann headers+cats \| Powerflex/strongflex PU bushings \| Vibra-technics engine mounts \| H&R anti rollbars \| KW V3 coilovers/KW camber plates \| Sachs race engineering clutch \| tons of custom sh#t
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