I am not an RF-Engineer but know a bit about electronics and I would say if the TCU overheats due to use then there are some serious design issues with the product and those concerns should be addressed....gez what would happpen if the TCU caused a fire near the gastank?

killcrap - backup your statement "continued use of non-approved bluetooth headsets cause the TCU to overheat. this has been proven in the field"

__________________
E83 - Aero PKG Mods installed: Homelink mirror. CIS-IBUS video module, AUX, Rr Dr Release, stock wheels, Remote start, CarPC (Atom) & mud flaps - NAV - MKIV - NA Map DVD - 2011
E46 - 18.5 wheels/tires (summer), 17 stock (winter), Homelink, NAV software upgrade, BMW video module, Radio to V53, AUX, USB IBUS interface,BMW alarm install, CarPC(Epia), remote starter, tank battery & angel eyes. NAV - MKIII - NA Map CD - High Version 2008.1