1998 Lexus LS 400 Owners Manual - Page 8

KEYS AND DOORS 1 Master key (black) - The master key works in every lock. For your Lexus dealer to make you a new key with built-in transponder chip, your dealer will need it. Subkey (gray) - The subkey will not open the trunk, trunk main switch and the glovebox. Key number plate - Keep the plate in a safe place such as your wallet, not in the vehicle. Since the doors and trunk lid can be locked without a key, you should always carry a spare master key in case you accidentally lock your keys inside the vehicle. If you should lose your keys or if you need additional keys, duplicates can be made by a Lexus dealer using the key number. You should also put a copy of the key number with your important papers. 2 3 The master key and subkey each have a transponder chip in their key head which is very important for the immobiliser system function, so be careful not to lose these keys. If you make your own duplicate key, you will not be able to cancel the system or start the engine. To protect things locked in the trunk or glovebox when you have your vehicle parked, leave the subkey with the attendant. 8