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 Universal Transmitter - Description and Operation
On early build vehicles, the universal transmitter can be identified by the Homelink® symbol and one red indicator light. On late build vehicles, the universal transmitter uses the Lear Car2U® System. It is identified by the lack of a symbol, but with 3 red indicator lights. Each of the 3 ...