Ford Focus Owners Manual: Keys and remote controls

Disabling the passenger airbag

WARNING: Make sure that the passenger airbag is disabled when using a rearward facing child restraint on the front passenger seat. Fitting the passenger airbag deactivation switch WARNING: ...

General information on radio frequencies

CAUTION: The radio frequency used by your remote control can also be used by other short distance radio transmissions (e.g. amateur radios, medical equipment, wireless headphones, remote contr ...

More about Ford Focus:

Ford Focus Spare Key Programming - Unlimited Key Mode - General Procedures
Special Tool(s) Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool Enabling Unlimited Key Mode NOTE: Unlimited key mode is intended for use by those customers who need more tha ...