Original thread got closed.

https://5series.net/forums/g30-discussion-58/plenty-fault-codes-cant-drive-all-154324/#post1623710

New update:
After a few days, fault messages disappeared and its back on the road. I didnt do anything to it I just wanted to try it.

Im really hesitant to leaving it to the Authorized shop here since I have had no luck with them before and they have a bad rep

 

You need to find an electrical specialist. This may be a case of a bad ground or connection if your alternator and battery is good. Has this car been flooded or have had major issues in the part like an accident of something

 

We had a minor incident last fall, and had it fixed right before the problems started. Another car hit the front in a parking area. Hood and the glass on leftside headlamp was replaced and jumper got a paint job.

Maybe i should remove bumper and headlamp and remount them just to check if any wires or outlets has been damaged or not mounted properly?

 

You can but I can't see a problem with that. I've seen crazier things happen though. Report back what you find. I'd also look at grounding wires under the hood also the positive jump point to make sure it securely bolted on

 

two things come to mind--a bad ground or some module faulting when the car tries to go to sleep. i know a bad ground can look alot like a bad battery since it makes all electronics go crazy

 

Allright, so last night when i got back from work i tore down the whole front bumper and grill and looked for damaged cables or faulty connectors but with no success.

Had the hood open and accidentally glanced at the aux battery under the hood and noticed it was old. I actually thought the workshop had it replaced. Checked the trunk and the main battery was new. Well, maybe they tested the aux and it was fine. But when i went to bed it gave me second thoughts about it so today i took the car to a battery and alternator specialist and got the battery tested.

It was at 18% capacity. So now i have a new one. Pretty sure this was the problem… atleast im hopeful. And a bit store i cant trust shops these days.

 

So in my old Jeep the aux battery did stuff like that--i do not think my US spec 530 has an aux battery up front! interesting. glad things are looking up.