I left mine in as well with the USB cable ran and had no problems whatsoever. BUT I have a very good relationship with my SA and the tech that works on my car. Usually I will call my SA and ask him if I need to take it out depending on what the problem is.
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[SIZE="2"]Crimson Red E92 335i M-sport 6-speed with MHD custom stage 2+ flash only , 40% E85/93 mix,+ HRE P40S wheels, KW Clubsport, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@124mph on street tires)
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