I hope this counts as my second post, so I can go back and try to find the fellow who previously posted photos of the innards of a Transponder-Key.
I have an old Mazda MPV with only one transponder key, & the dealer wants $270 for a second key, programmed. I'm planning to cut the key part off my only good key, and tape the chip-part to my steering column so I can use a plain key in the future.
But before I cut my key up, I want to be POSITIVE that it won't disable the transponder somehow. Like, maybe the key acts as the antenna or something else which sounds equally unlikely until it's too late...
I already tried using a "plain" ignition key while holding the Xponder key next to the ign switch, and if I hold it in the right spot it works fine. Neat-O-Matic!