Intermittent Rumble When Braking

Hi All,

I have recently purchased a 2017 Demo with 1500km on the clock. Occasionally when braking, there is a rumble noise (Bit like the Lane Departure Warning) The next time I brake there is no noise at all! Could this be the ABS coming on unnecessarily? The fact that it's intermittent makes me think it won't be a bearing, pad or rotor problem.

TIA
Shane