I got this info from a lock smith company, not used it yet as I need a reliable source for a new key with transponder at a sensible price. For ACR30 Key removed from the ignition Drivers door open, all other doors closed Insert key into ignition then remove it - do this twice Close and Open drivers door twice Insert the key into the Ignition then remove it Close and Open drivers door twice Close the door and Insert key into the ignition Turn ignition from o to on and back to o - once to add a new remote while retaining the original remotes, and twice to erase original remotes Remove the key from the ignition cylinder (Locks will cycle once for adding remote, and twice if erase mode was selected) Press the Lock and Unlock Buttons on the remote at the same time for 1 second Press any button on the remote (Door locks will cycle once if programming is correct, and twice if unsuccessful) HTHPS anyone know where to get a reliable key with chip in Sydney?