To add to that, the standard vehicle has a transmission oil cooler, there are no additional coolers needed.

Reprogramming is required on some models because the vehicle doesn't recognize all of the modules installed, and so the trailer towing module for lights doesn't function correctly. It is similar to Windows not working correctly with Plug and Play, and needing to be told that you have installed a new DVD drive. Once the vehicle knows the module is there, it works fine.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue