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Thread: 2005 BMW Z4 electrical issues

  1. #1
    Join Date
    Sep 2019
    Location
    Fayetteville, NC
    Posts
    2
    My Cars
    2005 BMW Z4

    2005 BMW Z4 electrical issues

    Hello, I need some help finding what is the issue:

    Permanent problems:
    Doors don't lock when the car is in motion
    steering wheel controls stop working
    turn signal indicators work outside, not in the dash panel, same with hazard indicators
    passenger air bag indicator button went off
    dash panel dim

    Come and go problems:
    roof top operation
    Driver seat controls
    open door warning
    warning alarm sound
    dash light stay on
    fob key functions

    Everything started after a rainy day

  2. #2
    Join Date
    Aug 2019
    Location
    GB
    Posts
    11
    My Cars
    2003 BMW Z4 E85
    Quote Originally Posted by alexhabana View Post
    Hello, I need some help finding what is the issue:

    Permanent problems:
    Doors don't lock when the car is in motion
    steering wheel controls stop working
    turn signal indicators work outside, not in the dash panel, same with hazard indicators
    passenger air bag indicator button went off
    dash panel dim

    Come and go problems:
    roof top operation
    Driver seat controls
    open door warning
    warning alarm sound
    dash light stay on
    fob key functions

    Everything started after a rainy day
    Check the air bag ECU under the centre console behind the hand brake. Disconnect the battery first, leave for 20 minutes so the car fully discharges, then disconnect the ECU, there should be two plugs ones black (this carries the live) and ones green. Check for moisture around these and that's your problem! Zeds have a problem with water ingress, it's a known defect.

    Sent from my CLT-L29 using Tapatalk

  3. #3
    Join Date
    Aug 2019
    Location
    GB
    Posts
    11
    My Cars
    2003 BMW Z4 E85
    Quote Originally Posted by alexhabana View Post
    Hello, I need some help finding what is the issue:

    Permanent problems:
    Doors don't lock when the car is in motion
    steering wheel controls stop working
    turn signal indicators work outside, not in the dash panel, same with hazard indicators
    passenger air bag indicator button went off
    dash panel dim

    Come and go problems:
    roof top operation
    Driver seat controls
    open door warning
    warning alarm sound
    dash light stay on
    fob key functions

    Everything started after a rainy day
    Check for water ingress in the centre console behind the parking brake. Disconnect the battery first, leave for 10 to 2O mins for all the circuits to discharge, then take the little pocket that's situated behind the parking brake out, that should give you access to the plugs that go into the airbag ecu. If there's moisture or it feels real wet that's your problem. Dry these out and check all drainage holes in the gulley's and also the inner door membrain's as these are the main points of water ingress.

    Sent from my CLT-L29 using Tapatalk

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