:rolleyes: Went to drive it @ 6:45AM for an MRI appt... and was greeted to battery warning indicator. :dunno:



Will troubleshoot later... have to go over to my parents to hang a door for them.

Battery sign while car is running would be alternator on it's way out no?


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Might be. You can check voltage with engine running by unlocking the cluster or with multimeter. Voltage should be approximately 13.8 to 14.2V. Essential tools for DIYer should include good multimeter.

Finally installed the door handle carrier on driver’s side rear door.

Agreed on the multimeter. I can't live without mine.

It's the alternator. Getting 14.3v - 14.4v with engine running. But every now and then it dips down to 13v ish so I'm guessing the voltage regulator is going out. Carly also pulled a code for engine generator so I'm guessing it logged a code for the alternator too.

Also got codes for steering angle/yaw sensors but going to do those after alternator in case those were voltage dip/spike errors.

Is that at idle? I checked mine today and at idle it was steady 13.8v


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13.8 is ok

What did I do to my E53? Loaded up the family, drove the 4.8is all over, Dinan exhaust and intake singing, pure pleasure. No issues, smooth, and pulls strong. It is next in line for an oil change. Been a long time since any unscheduled service. Very happy with her.

Engine running at idle should be a stead 14.4v ish +/- a couple tenths of a volt. Mine was dipping down to ~13.2v at some points. 13.8v is not going to hurt anything... but it should be higher than that. Did you have any accessories going? I test mine with AC off, lights off, etc. Radio I leave on usually. The computers start to get unhappy in the low 13's and really get pissed in the 12's.

:iagree: Check with all current drawing stuff shut off.