> >My car came with that from the factory -- embedded in the key. It's even > >got a provision for learning new transponder codes, as long as you have a > >working key to do it. > > My understanding of these systems is that it will only learn a new key if > you have the master key supplied with the car when you start the programming > process. You cannot use any existing working key to start the programming, > only the master. Nope - mine will allow programming for a new key using any existing valid key. There was no designation of a "master" or anything else with the two keys supplied bythe factory,and I just checked the manual again to be sure. It's a '98 Ford Mustang, by the way, not some fancy-schmancy Euro-thingie. 8-) Dale -- A train stops at a train station. A bus stops at a bus station. On my desk I have a workstation... -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads