Not sure whether to post this here or not, however, seeing as you are very nice bunch of people, and very knowledgable too, I thought I would. Please tell me off if it's not allowed (especially as it's BMW). My Z3 has an alarm fob but the battery was dead and I replaced it today. The red light is constantly on and it does not unlock the car with the buttons. Does the fob have to be reprogrammed or reset? Thanks. PS. I have posted this on a BMW forum however the replies do not seem to be as forthcoming or as quick as here!