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I'm sure Dealerships know to look for slits in the wiring where piggybacks are generally installed. Nothing stays 'secret' given all the forums that get monitored. Hell, just google a term and it'll pull up a forum discussion on a new mod/discovery,etc. It's not brain surgery for BMW to find things out........
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2015 BMW F36 428i JetBlack. Sport Line Edition
25% 3M Tint|
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