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Post Info TOPIC: bmw airbag codes


Veteran Member

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Posts: 90
Date: Feb 22, 2011
bmw airbag codes
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06 bmw 325i 3.0L

came in with air bag light on, scan it and got codes:

93B2 Safety battery terminal.

that's what I got from my diagun, but can't find any diagnostic info for those codes in Mitchell on demand. tried googling those codes and nothing came up either. seems like an odd code number. can anyone help?


-- Edited by chopstick on Tuesday 22nd of February 2011 03:15:03 PM

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Senior Member

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Posts: 126
Date: Feb 22, 2011
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" The battery saftey terminal (BST) is used to reduce the risk of a short circuit to the B+ terminal of the battery in the event of an accident, as a result of a short circuit on the cable running from the B+ terminal of the battery to the Starter & Alternator (an unfused/unprotected circuit)."


Long story short, check the small 2 pin/wire connector (BST igniter signal from MRS) that plugs into the positive terminal.  Often those connections will be loose or there may be too much resistance, thus triggering the fault.  Luckily, its doubtful that the MRS module is bad.



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Date: Feb 23, 2011
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thanks eric, that helps. I know what it was, but I just assume that if it goes bad, the car wouldn't be able to run. other then the air bag light being on, everything was fine. I didn't even think about high resistance.

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