Flat Keys - Lexus 2004 LS430 Owner's Manual

A transponder chip for the engine immobilizer system has
been placed in the master and sub keys. These chips are
required for 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 trunk or glove box when using
valet parking, leave the sub key with the attendant.
Since the doors and the 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.
We recommend writing down the key number and storing it in
a safe place.
KEYS AND DOORS

Flat keys

11L250
" 1 Mechanical flat key 2 Engine start flat key
A mechanical flat key and an engine start flat key are
included in the key case. Both flat keys are not equipped
with smart key system.
The mechanical flat key works in every lock, but cannot
be used to start the engine.
As a transponder chip is built in the engine start flat key,
you can start the engine only with this key.
A transponder chip for the engine immobilizer system has
been placed in the engine start flat key. This chip is required
for the system to function correctly, so be careful not to lose this
key. If you make your own duplicate key, you will not be able
to cancel the system or start the engine.
Insert your flat key plates in its key case as shown. We
recommend that you always carry this with you for emergency
use. Do not leave it in your vehicle.
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