The Ford Mustang has been around since 1960. Earlier models, of course, did not come with factory keyless entry, so one cannot program a factory remote. Keyless entry began appearing in Mustangs in the mid-1990s.
The programming procedure is basically the same for 1996 to 2004 Mustangs. Models made after 2005 require a different process (also included below).
1995 to 2004 Mustang Instructions
Up to four transmitters can be programmed for the 1995 to 2004 Ford Mustang. To start, insert the Mustang’s key into the ignition. Leave it in the “Off” position.
Quickly move the key from “Off” to “On” eight times. The maximum time frame for this is 10 seconds, so do it quickly or it will not work. If done correctly, the Mustang’s doors will lock and unlock in succession. This tells you the Mustang is ready to accept the new remote.
Push either the “Lock” or “Unlock” button on the remote you wish to program. The Mustang’s doors will again lock and unlock to signal the remote has been synced to the car. Remote for any additional remotes, and then turn the key to “Off” and remove it.
2005 to 2013 Mustang Instructions
The 2005 to 2013 Ford Mustang uses can integrated key/remote fob. To program it, you must have a working key/remote combo. To begin, insert the currently working key. Turn the key from the “1” to the “3” position. Leave it in the “3” position for five seconds, and then turn it back to “1.”
Now remove the key and insert the one you are programming. Turn it from “1” to “3.” Keep it in the “3” position for six seconds, and then remove it.
The new key/remote is now programmed. Up to eight keys can be programmed to the 2005 to 2013 Mustang, but only four can use the keyless remote feature.