Thanks for the response...
The tech said that there was a part of the chip set that was not compatible for the Z4 sDrive 35I....was it to do with the transmission, or something ?...wasn't paying enough attention after telling me it would not work. So I went online and saw that Burgertuning with a chip set JB4 that would be compatible for a 2009 Z4 sDrive 35I....with a name like that you would think I was going to McDonalds for a burger and chips.
Just wondering has anyone got any feed back on this chipset? Will be looking at the Chipset that was mentioned.
look forward to a reply.
Thanks Geoff