Sunroof wiring diagram

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  1. #1
    Morning all, I have a question! I have a sunroof that doesn't work because the previous owner changed the BCM & apparently its one from a model without a sunroof, BMW want a lot of money to recode the module to see the sunroof, so I thought I could wire it myself by running extra wiring either directly from the battery with an inline fuse or through the relay with a new feed from the battery.

    My question is, does anyone have wiring diagram for a 2003 MCS & also does anyone see any issues with my plan that I have missed? Thanks for your help 😁👍

    - - - Updated - - -

    Forgot to say, they gave me the old BCM which I refitted to test & the sunroof worked perfectly so the motor etc are fine ��

  2. #2
    Test Passed
    Join Date
    Nov 2015
    Location
    Co Durham
    Car
    R56 SD (Black)
    Posts
    74
    Is this not a case of recoding the BCM (enabling the sunroof option) ?

    Sorry, my experience is mainly R56’s but it might be a whole lot easier than trying to review it

  3. #3
    Thanks for the reply Kettlepot, BMW said they might manage to recode it but they weren't sure and it could get expensive as I would be paying for investigation time which could be extensive!

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