More likely it is controlled by an accelerometer. Did you test it out whilst stationary or actual heavy braking with someone watching from behind?Forgot to check! Did it just now and of course the brightness does not vary with respect to pedal pressure. On/off just like any other car that doesn't have that aftermarket module that makes the brakelights flash with varying frequency (very popular with motorcyclists). I would have been truly amazed if this ABS feature were actually present.