The new HID set up grounds through the cars existing wire harness. It works!!

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2012 BMW F02 750LiX, Alpine White, M-Sport, Dinan Stage III, Dinan Exhaust, H&R Sport Springs, Coded, Paddles.
2012 BMW F12 650iC, Mineral White, Dinan Stage III, Dinan Exhaust, Dinan Shockware, Coded.