Electrical Issue

cybercbl · 09-03-2024, 09:28 PM

Hi. I replaced my battery almost two months ago on my 09' 328i. About two weeks after that i started to have electrical issues. It first started when I went over a speed bump, then any bumps, and eventually would happen randomly. The car will shut off / lose power, turn back on (within a second or less), rev to 3/5 rpm, & mainly the ABS sign will come on. This is all happening simultaneously, but will go back to normal within 1/2 seconds.

I did reset my battery about a week after replacement. My current suspicion is that it has to do with the wiring to the alternator, or just in general the alternator. I haven't found any dialog on this specific problem & am slightly new to DIY with my e90, so any help is extremely appreciated.

Would like to know if anyone else has ran into this issue and/or anyone can help with a diagnosis/solution.

Thank you!

ctuna · 09-04-2024, 03:49 AM

Are you sure you put pushed the battery terminals all the way down on the lugs before tightening ? the first time I had the battery out I just placed the terminals on the lugs and tightened but this did not put and actual mechanical grip from the terminal to the lugs. End of the cable must be pushed down
while tightening.

09-03-2024, 09:28 PM	#1
cybercbl Registered 0 Rep 1 Posts Drives: BMW 328i Join Date: Sep 2024 Location: Los Angeles, CA iTrader: (0)	Electrical Issue - E90 turns of/on while driving Hi. I replaced my battery almost two months ago on my 09' 328i. About two weeks after that i started to have electrical issues. It first started when I went over a speed bump, then any bumps, and eventually would happen randomly. The car will shut off / lose power, turn back on (within a second or less), rev to 3/5 rpm, & mainly the ABS sign will come on. This is all happening simultaneously, but will go back to normal within 1/2 seconds. I did reset my battery about a week after replacement. My current suspicion is that it has to do with the wiring to the alternator, or just in general the alternator. I haven't found any dialog on this specific problem & am slightly new to DIY with my e90, so any help is extremely appreciated. Would like to know if anyone else has ran into this issue and/or anyone can help with a diagnosis/solution. Thank you!
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09-04-2024, 03:49 AM	#2
ctuna Lieutenant General 2039 Rep 13,352 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Are you sure you put pushed the battery terminals all the way down on the lugs before tightening ? the first time I had the battery out I just placed the terminals on the lugs and tightened but this did not put and actual mechanical grip from the terminal to the lugs. End of the cable must be pushed down while tightening.
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