Quote:
Originally Posted by SC_B5X
From what I understand if you take the JB4 off before dealership visits they'll never really know it was there. Unless you blow up your motor and they are really looking into why it happened. But I would take a JB4 over a JB+, Racechip or any other piggyback tune. Only takes 5 minutes to take off.
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So what you're saying is that it's detectable.
As I've said before, they're not looking for that stuff for routine maintenance or minor warranty work. BMW will always have the means. We're saying the same thing, actually.