My 2007 Suzuki swift ABS light keeps coming on?

For a few months now my ABS light has been coming on and off. I have taken the car to the garage for a diagnosis; they plugged it into a computer and everything is fine. So this now means that when I call Suzuki they're more than likely going to try and get me to replace the driveshaft, which I have been reliably informed is not necessary. Can anybody shed some light on whether new ABS cogs will resolve this problem? Had so many problems with this car and this is the final straw. Seriously debating whether to just buy a new one with a long warranty!.