I have a 97 legacy gt, and sometimes while driving the key reminder buzzer comes on for a few seconds. I have already checked the drivers door switch, and it seems to working okay. There was no corrosion on the ground screw for the door switchs. I was maybe wondering if it had something to do with the ignition switch. Its the noise you would here if you left the keys in the ignition and left the door open. Any comments would be a help./

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On the older models there is a 2 wire plug that runs to the ignition switch for the key chimer noise, so your ignition switch suspect isnt a bad idea here.