Trans. failsafe and ABS controler

[damas9963]

I'm having trans.failsafe prog showing on my [COLOR=blue !important][COLOR=blue !important]x5[/COLOR][/COLOR], 2001 4.4i. 104k miles
My code reader gave me the code P0600 ( can bus malfunction).
ABS, Brake and Traction lights are yellow ( [COLOR=blue !important][COLOR=blue !important]brake [COLOR=blue !important]light[/COLOR][/COLOR][/COLOR] turns red intermitently)..After reading too many posts I'm thinking it's the ABS module control unit that is the faulty part??
Can you help with diy removal of ABS Modulator?
Is it best to buy used one and recoded at the dealer, or send the original to be rebuilt?
Thanx