Ford Focus 2004 Owner's Manual page 85

Locks (security)
ENGINE IMMOBILISATION
SYSTEM
The engine immobilisation system
is a theft protection feature which
prevents the engine from being
started with an incorrectly coded
key.
Coded keys
Your vehicle is supplied with coded
keys.
Only keys with the correct
electronic code can be used to start
the engine.
Two coded keys are needed to code
a new key. Should you lose one key,
take all your keys to your Ford
Dealer who will replace the lost key
at your own cost and reprogramme
it together with the remaining keys.
Automatic arming
The system is armed five seconds
after switching off the ignition. The
indicator light will flash every
two seconds.
The vehicle is now electronically
protected against vehicle theft.
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