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Thread: Bmw e46 roof not working

  1. #1
    Join Date
    Apr 2020
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    manchester
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    bmw e46 convertible

    Bmw e46 roof not working

    hello again guys. spent some more time on the e46 roof and found that the problem seems to be with the module under the back seat. i can now drop the roof on the button but nothing happens when i try to close it although i have managed to get it to close once after pressing the release button the module under the seat. The rest of the time ive had to close it manually. Think i should also mention that the apron which lifts to store the roof isnt locking on the right hand (drivers) side when i close it. could this be the cause of the problem and is there a process to calibrate the cogs and cables in the seat module ?

  2. #2
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    The main problem on these cars is the main wiring harness the runs up along the drivers side of the roof, wires break over time that is the first thing is would check

  3. #3
    MauiM3Mania's Avatar
    MauiM3Mania is offline Observer/Master Skeptic Moderator
    Join Date
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    88M3 99M3 04M3 ITBx16
    Thread relocated to the model specific area.
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  4. #4
    Join Date
    Apr 2020
    Location
    Los Angeles
    Posts
    2
    My Cars
    BMW 330ci
    Mine quit working a few years ago. It was very hard to find someone to fix it. Nobody wanted to touch it. Turned out to be lose wires that cost around $500. I took it to Avus Autosport in LA. Excellent BMW specialists.

  5. #5
    Join Date
    Apr 2013
    Location
    Mill Valley, CA
    Posts
    346
    My Cars
    2003 330cic
    There are some excellent diagnostic threads in the vert section of e46fanatics.com

    Vert issues are usually the harness wiring, specifically above the driver's seat but often at each of the hinge points. You can patch, or replace the whole harness, which is not "hard", but takes a ton of time and patience. Without a doubt the longest DIY I have done.

    Also the gear on the locking motor (under the back seat) can get unseated or stripped. As a result the tonneau cover latches don't open and the system gets an error. You really need to get INPA to help diagnose.

  6. #6
    Join Date
    Mar 2007
    Location
    cowichan bay, bc, canada
    Posts
    859
    My Cars
    06 330ci zhp convertible
    Try putting pressure on the box under the rear seats%. Known fault that gear pops up. I used plumbing strapping and a small block of,wood to put pressure on it. Has worked fine for years%...

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