Lexus RX300 2003, Owner'S Manual

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KEYS
11R105
1 Master keys (black) – These keys work in every lock.
For your Lexus dealer to make you a new key with
built–in transponder chip, your dealer will need it.
2 Sub key (gray) – This key will not open the glove box.
3 Key number plate – Keep the plate in a safe place
such as your wallet, not in the vehicle.
A transponder chip for engine immobiliser system has been
placed in the head of the master and sub keys. These chips
are needed to enable the system to function correctly, 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 items locked in the glove box when using valet
parking, leave the sub key with the attendant.
Since the doors 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.
We recommend writing down the key number and storing it in
a safe place.