Update:

This weekend I pulled an ABS Module out of a 03 X5 3.0 and put it into my 03 X5 4.4, and I went from the error codes in my first post to this:



I'm guessing I need to have the ABS Coded to my car.

Another question, Is the 2 axle Air Suspension Compressor on a 2004 Range Rover the same as the ones on X5s? They are practically identical and made by WABCO