Bmw cas module battery drain. The time now is 06:52 AM. Jun 13, 2025 · What is the role of the CAS module in E-Series BMWs, and how can it cause battery drain? The CAS module, responsible for controlling various functions including engine start-up, can perpetually drain the battery if it is faulty. I measured the battery with a voltmeter and it was 12. Oct 13, 2015 · According to the wiring diagram, the CAS module sends power to several circuits via the fuse box. I monitored the amp draw on the battery as I pulled fuses and saw a large drop when I pulled fuse #36 (CAS). After I changed it (Cost around $1300, first the dealer asked for $1670) Apr 4, 2024 · E92 Power Failure/Battery DrainAll times are GMT -5. The circuits are powered through a relay on the fuse box. Most have resorted to replacing the cluster. Hence, this thread. I started having problems with my battery going dead, especially overnight. xi5r zdozfw ag 3c8 zv ptbv n2bkd4 vryoaf 3x pmv4a