yeah mate i had the same problem, u might think theres enough brake fluid, but when u go round a corner the fluid moves away from the sensor and the light comes on. u might wanna get the seals checked cos the brake master cylinder is linked to the hydraulic clutch and if u let it go too long (like i did) then your clutch will stop workin in the middle of a damn roundabout and youll have to push ur car off the road!!