[LAP1DOUG]

According to my E46 M3 Bentley Manual, the 2001 - 05 model years use a Teves Mk 20 EI DSCIII. The electrical diagrams show:

RR speed sensor - Pin 22 yellow/black wire & Pin 23 yellow/Brown wire
LR speed sensor - Pin 5 Brown wire & Pin 6 Blue wire

RF speed sensor - Pin 19 Brown wire & Pin 20 yellow wire
LF speed sensor - Pin 1 Brown wire & Pin 2 Brown/red wire

There seems to be some other complexities such as the type of wheel speed sensor that is a different type than the non M3, and the DSC system takes some inputs from the CanBus for yaw rate and steering angle.

I would suggest to get the Bentley manual to make sure you get it right.

By the way, I don't notice that the E46 M3 brake ABS is really any better than my 986S unit, and I end up getting into ABS a pretty good bit when trying too hard at Auto-x.

Try the guys over at M3forums.com to see if they have some photos or other data.

Good luck