Quote:
Originally Posted by JLSmith550
Hey I just picked up a '14 F30 335i. I hear a lot about the jb4 tune but does anyone get flack from BMW after tuning? Any CPO warranty issues?
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the beauty of the piggy-back is you can remove it whenever you want. it is traceable if BMW looks for it. i assume there would be cpo warranty issues if you disclose it. you have to go "all in" when you do this. if you think you might be paranoid about it then maybe don't do it. you can put your $$$ into other mods.