If it is possible to buy it in a disruption, you need the CR or switchboard, the WSP module and the key of the key, all of the same truck, since these three pieces are linked and has no problem, and logically it will cost you less, between approximately 50% less.
I recommend two things:
first that if you are going to buy in a disinchable disgust or that they try that it works in the truck that they are taking it away, in your truck or in any other.
Second: that checks that in your truck do not have any short since otherwise you could burn the new switchboard.
Good luck and you tell me
greetings