Lost Zed keys whilst moving house. Looked everywhere but they are gone gone gone. So I wrote down the key codes on the sticker located inside the glovebox. Local Nissan dealer is useless.....a waste of space!!! Local locksmith is a goodin. He looked up his computer and cut the ignition key from just the number I supplied him. Door key is a different matter. The code is 4 digits long. He says that it should start with a letter. It sure doesn't. Do all S30's have 4 digit lock codes?