c127 error codes wont display

jdexter

21 June 2026 14:23

i have a g82 m4 gt4. It has a bmw motorsport build custom c127 display. I updated the files to run an aftermarket IR tire temp camera and tpms. It works perfect. However, somehow it broke the alarm system. When the red leds are flashing for an alarm, it no longer diplays any codes. Can anyone help me figure out how to restore it?

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  Stephen Dean

  22 June 2026 03:32

  Hi,

  As this is a custom configuration, you will need to speak to BMW or their agent about it.

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