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 Remote Keyless Entry (RKE) Transmitter Programming - General Procedures
NOTE: A maximum of 4 Remote Keyless Entry (RKE) transmitters can be programmed to the vehicle. Programming must be done at the same time for all the RKE transmitters. NOTE: Programming (or reprogramming) of the RKE transmitters can be accomplished using a scan tool or by carrying out the fol ...