Hey guys new to this forum but not to BMW. I have the SLS inactive fault on my X5 and I have diagnostic software and know that the control module is bad. My question is how hard it is to code a new module to my truck? I'm am by no means helpless just haven't done much coding. if I spring the $500 bucks for the part I'm not gonna pay Bmw $300 to code it when I know it only takes maybe 20 minutes. Any help or guidance would be much appreciated.