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Thread: 2012 135i LED halo bulbs

  1. #1
    Join Date
    Apr 2011
    Location
    Kansas City
    Posts
    132
    My Cars
    2007 335xi

    2012 135i LED halo bulbs

    Hi,


    Will a 2012 BMW 135i throw error codes if the halo bulbs are changed out to LEDs? My 2007 did not but I'm not sure if that's changed on the 2012 models.


    Thanks
    Malcolm
    07 BMW 335xi
    12 BMW 135i

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    6,338
    My Cars
    2018 BMW M240i
    The lighting control module (LKM) is looking for a specific impedance (~resistance) level from the lights. It can send a code or light the “light out” indicator in the gauge cluster.

  3. #3
    Join Date
    Apr 2011
    Location
    Kansas City
    Posts
    132
    My Cars
    2007 335xi
    But do you know for sure it does it on the halos? On my 2007 it does not care about what halo bulbs are in or if they fail. Other bulbs like fog lamps, turn signals etc. yes it complains and throws errors on the dash. I'm wondering if the 2012 is the same way? Looking online I see regular looking LED bulbs that I can get for a nice clean install and then others sell these more complicated setups with extra wires and boxes, CANBUS box they claim yet it doesn't plug into the CANBUS so not sure how that works. Not sure if I need to spend the extra money and deal with all that mess or not?
    07 BMW 335xi
    12 BMW 135i

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