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      10-29-2019, 08:04 AM   #1
kyriian
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Battery light mystery

Probably being overly dramatic, and its at the shop now, figure I ask the Zpost group

The last 3-4 times I had started the Z4M, shortly after starting it in the morning to go to work, the battery light lit up
Car starts fine
Battery light stays lit up to 5-10 minutes, then it goes away
I plugged my OBDII scanner in and ran live data, it was reading 11v-12v when the battery light is on, so its running low on charging, it then suddenly jumps back to 13-14v after, no suprise, at the same time the battery light goes back off.
I thought it maybe battery but obviously not as it is holding a charge though its on its way out, the alternator is working and providing the voltage, its just seems to not do so when its cold.
Belt is changed about 7000km ago, it doesn't look like it was misaligned

I am stumped
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      10-29-2019, 12:59 PM   #2
Clearancediver
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Voltage regulator on the alternator is the problem.... needs to be replaced.
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