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Thread: 2004 losing radio station and key memory

  1. #1
    Join Date
    Mar 2008
    Location
    Coquitlam, BC, Canada
    Posts
    226
    My Cars
    2003 530i

    2004 losing radio station and key memory

    My 04 530i loses radio station memory and the key fob does not operate any doors/trunk. I can disconnect the battery and the forgotten radio presets will come back, but only for a few engine restarts. The key fob previously worked well and I could perform a key sync operation with the central locking. My next step is to find a tester to see if the fob transmits. Still the radio station preset thing is pointing me in a different direction.

    Some background... My car came with S605 and S639 and a Bluetooth TCUM in the trunk that was never activated. The TCUM didn't want to code/talk with NCS Expert, but it did successfully update to a later ZUSB with Winkfp, which took 75 minutes with a KCan cable! I have made quite a few coding changes to the CAS and TCUM and now have working Bluetooth!

    Mission accomplished?! Any advice on next steps?

    Sent from my LG-H915 using Tapatalk


  2. #2
    Join Date
    Mar 2008
    Location
    Coquitlam, BC, Canada
    Posts
    226
    My Cars
    2003 530i
    Problem solved. I recall dropping my keys, rather hard too. I decided to cut the key open and sure enough, my soldering job on the replacement battery had come loose. All fixed.

    Sent from my LG-H915 using Tapatalk


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