No they are not. They do as they are told by the central locking module and that's the end of it.

Your best bet though is actually to buy one from Ford - they are about £70 (and then a fiddly pain in the arse to fit - I cut my hands to ribbons doing mine on a 3 door) but they are notorious for failing so you may very well find yourself paying £25 - £30 for one and getting anywhere between 6 days and 6 years usage out of it. At least a brand spanekrs one you can guarantee a decent amount of life out of it.