Recently bought an 02 Lexus LX470. Got two keys, one with a remote and one without. Both are cut the same. I think this means both are valet keys or both are master keys. I tried to get a new master key made at Ace Hardware today and while their computer said the new key was programmed it wouldn't start the vehicle. I am now wondering if that is because both are valet keys since you need a master key to program a new key. I've read here that you should be able to identify a master key by how the security light behaves when the key is inserted in the ignition. However, I can see no security light anywhere in the vehicle. Can anyone give any advice in how to determine if I have master keys or valet keys? I simply assumed the key with the remote was a master but I now realize that was an assumption I should not have made. Ace did ask for the master key while attempting to program the new key and the fob key is what I gave them.