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Thread: SOS Call System Malfunction

  1. #1
    Join Date
    Apr 2019
    Location
    Huntsville, AL
    Posts
    2
    My Cars
    528i

    SOS Call System Malfunction

    Hey guys,

    I have this error, and neither my Bluetooth nor my USB work along with this error message. Any ideas? I had a bimmer shop run diagnostics on it but he couldn't figure it out and said he'll have to begin unplugging things to narrow it down that way. Thanks. It's a 2008 528i.
    Last edited by Solisspirit; 06-12-2019 at 12:06 PM. Reason: Edit

  2. #2
    Join Date
    Jan 2007
    Location
    .
    Posts
    7,708
    My Cars
    .
    Here's an idea: take it back to the shop and let him finish his diagnostic procedure. Without codes or anything, there's no way to narrow it down. Any one single module on the MOST bus could be down, stopping communication, or it could be the TCU/ComBox module itself. Have it properly diagnosed and don't just guess at it. This isn't a lawnmower.
    ASE and BMW Master Certified Technician

  3. #3
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    Remove the sos module with the fiber optic loop it's in the trunk the loop is available thru BMW parts

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