930B is a BMW fault on the battery safety terminal, the pyrotechnic device that separates the positive cable in a serious crash. The published definition is general and does not name a specific electrical condition.
The battery safety terminal sits on the positive battery post with a small charge inside the clamp. In a severe impact the ACSM fires it, cutting the heavy current path to the starter and alternator cables so a damaged harness cannot feed a fire. Because it is a monitored pyrotechnic device, the module watches its circuit and reports 930B when something about it is wrong.
General wording means the useful detail is elsewhere. Check the rest of the scan and any freeze frame information, and look at the terminal itself. A terminal that has already fired reads differently than one with a wiring problem, and both land under the same code text. Physical inspection tells you which one you have faster than testing does.
The definition does not label this as live or stored, so verify it on the vehicle rather than assuming. A live fault reflects a condition the module can measure at this moment and clears when the condition is fixed. Crash data is the permanent deployment record, and the difference matters because a car whose safety terminal actually fired also has crash data locked in the ACSM.
If the terminal fired during a crash, replacing it is part of the repair and the module will still need our mail-in reset to release the stored crash record. If the problem is a damaged control wire or a corroded connector, the repair is electrical and no reset is involved. Call 501-988-0611 with what you are seeing and we will help you figure out which path applies before you order parts.
930B is a BMW code. The pyrotechnic battery safety terminal is a BMW design, and the hex numbering comes from BMW diagnostic software rather than the generic code set.
Open the trunk or lift the rear seat and look at the positive battery terminal, because a fired safety terminal is visible and settles the question immediately. Inspect the small control wire and its connector for damage and corrosion while you are there. Once you know whether the device fired, you know whether this is a wiring repair or part of a post-crash job that includes a module reset. Related codes: 0X930C1F, 93B2, B1684.
Mail us your original module. We restore it to factory-ready condition for a fraction of dealer cost, the same way we have since 1997.
Genuine OEM, tested, and shipped ground from Jacksonville, Arkansas.
Do not see it listed? Request a part or call 501-988-0611.