My goodness you are all right BMW Dealers do not know what they are doing neither it seems do BMW themselves
I have just come of the phone and they insist there is a recall and is DATE based and NOT key Type
However I have told them they are talking rubbish and the smart a**es on the Z4 Forum know far better
wegras said:SO FOR ANY E85/E86 owner with a Sept 07 on build car don't bother to call the hotline where they will not confirm the car and not send send an email
to your Dealer to contact you to bring it in
The number you don't want to bother to call is 0800 083 4397
Oh and for the technically minded and the smart a**es it is NOT KEY RELATED BUT a OBD and software issue as I thought