Hi all, Im new to the forum.
As the title suggests, should I buy the BOX CS1 from Chippower for my fiesta? Has anyone tried this? How hard is it to do? Is it reversible?
Im not an expert on working on cars but I can do a few small things...
From what I gathered it SHOULDN'T be a very hard job to do but Im scared Ill screw something up since I have to mess around with a sensor and probably some other stuff.

Thanks for the help.