NOTE: I do not know if you MUST bridge the pins with this cable. If not, make sure to set the USB port being used to COM1 and Latency Timer=1 for each new USB port that you plug into. NOTE: MAKE SURE TO ALWAYS USE THE SAME USB PORT. Set the cable to COM1 with a Latency Timer of 1 in Device Manager. Your mileage may vary here - you will need your PC to recognize the cable as an OBD interface. Windows automatically downloaded drivers when I inserted the cable into the USB port. Google bimmer$0ftw4re but replace the characters with the appropriate letters. I bought the cable from - Website gets blocked. This does not mean these choices will be guaranteed to work for you with your PC and/or vehicle. I will provide information for what I have CONFIRMED and VERIFIED has worked for me to code my 2007 USDM Z4M coupe using a Win7 laptop. For other cars, make sure you select the corresponding chassis code. I will refer to E85 moving forward, but the instructions apply to any E85/E86 variant. Note: With coding, all E85/E86 Z4 models are under the “E85” chassis. This guide should serve all E85/86 Z's, with only some minor modification for other chassis needed. I know there are a number of these walkthroughs around various bimmer forums, but I still had a hell of a time working this out, so one more will be useful to someone, I'm sure, especially for us Z folks to have one specifically with the Z in mind.
