I had to reset the light by diconnecting the battery for a length of time then reconnecting it. Remember not to close the boot after you have disconnected the battery as the boot lock is electrically operated - I did this and had to remove the child seats and the rear seat to find the emergency release cable.
This will only work if the sensor has been replaced.
on the back of this, at what stage should the brake pad warning light come on?? I got new pads and discs on as dealers told me they were down to the last recommended mm before they need changed? Warning light hadn't come on by then
Not sure about MINI prices, but I know these are now available aftermarket from a good Motor factors, I recently managed to get one for my 06 Beemer - about £7
Cant imagine the sensor being much more than a tenner. If your fitting your own brake pads, you can fit the sensor - it just clips into the edge of the pad, and theres a plastic plug on the other end, which plug into the loom.
What year is the car?
The latest model has condition based servicing which means that the pad sensor wears down with the pad. I changed my front pads and my service light said 1100 miles since!
It still has the wear-through warning light at the end of the pad life, but when I renew the pads, I'll be fastening this sensor up away from the wheels.
It doesn't take much to look inside the wheel to realise your pads are shot.
[I've got one from the dealer when I went in for a service. It was about £15.]