As mentioned recently, I read about an Automatic Brakes Initiated Annunciator kit and ordered it. It came quickly and included good install instructions. The module is installed behind the third brake light and wired so that when you press the brake pedal, the light flashes a few times. The module is designed so that the light does not flash every time you brake, but only after some time with the brakes not pressed.
So I removed the third brake light (easy – three torx screws at the top of the boot lid) and wired the module (quite easy, but there is not much space to fit the module behind the third brake light):
I tested the module and wiring before refitting, then had a friend press, release and press the brake pedal while I video’ed: for the not terribly exciting (and silent) video result:
I am not sure if this is really a good mod – I have not been behind my MINI while driving it to know if the flashing has much effect, or if it is annoying. I can hear the clicking of the module when I brake, if the stereo is not too loud (not annoying, but noticeable). But at $15, I cannot argue with the price – if I made my own module it would be a similar cost!
UPDATE (September 29, 2004): This mod is no longer in GBMINI – the click-click-click every time I braked was driving me crazy; the claims about it not re-flashing if you brake again in a short time is also not true for me.