@Ayune great idea! Definitely going to do this mod. I had the P3Cars gages on my last two BMW's and really wanted to find a solution for the J100. Gages like this are indispensable in this era of "dumbed-down" instruments.
If what's needed for connection to the OBDII is ethernet cable, you can use bulk cable which is easy to fish through, and then terminate the ends. I did this with 4-wire (phone style) cable to make a custom setup for a Valentine One radar detector in a previous car.
If what's needed for connection to the OBDII is ethernet cable, you can use bulk cable which is easy to fish through, and then terminate the ends. I did this with 4-wire (phone style) cable to make a custom setup for a Valentine One radar detector in a previous car.