The vehicle periodically will not brake. I have fortunately avoided 3 separate accidents by crossing the center lane and avoiding the vehicle in front. One time pumping the breaks worked to stop the vehicle, and the other times it took a large distance to nearly coast to a stop. The master cylinder was replaced and the brakes, the brakes were bled, etc. and the cost of repairs is adding up with no results. I read that it may be the (hecu) unit??? It's fairly dangerous - sometimes it stops, sometimes it does not.