Hey guys, need some help. 2004 545i E60

I've been having issues with my car draining overnight. Brand new AGM battery - IBS disconnected - I hooked up a multimeter in series with the battery and confirmed that I have a draw of roughly 8 amps. I went through and pulled each fuse one by one to isolate the issue.

Unfortunately there were 4 different fuses and 1 relay that caused the draw to drop!

Fuse #57 in trunk - Current Monitoring (how is this possible!? I have IBS disconnected!)

Fuse #29 in glove box - Diagnosis

Fuse #15 - Ignition/start electronics (again, scratching my head.... car is off, no key in ignition)

Fuse #11 - central locking system (i assumed this was from the door being open while we were in glovebox)

Lastly, the "Terminal 30 g relay" (trunk) directly left of fuse #57 was drawing a few amps.


I'm hoping you guys can help point me in the right direction... This is killing me as I just bought this car and haven't even been able to drive it. Seems to me like this is way too many systems drawing power for a normal issue. I'm thinking the relay might be the overlying issue if the car isn't going to sleep or something, but have no idea.

Also really confused why the "current monitoring" system is causing a draw when I have IBS disconnected.

Thanks everyone,

-Josh