If you have the tools its definnitely DIY - able, I don't think its that hard of an install from what I've seen. The wiring kit comes with the kit or you could buy it separately, but if I was going to put a hitch on my X, I would use the OE hitch and install it all at once.

I never read about having your truck coded afterwards, but I could be wrong.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards