One problem related to brake master cylinder has been reported for the 2015 Buick Encore. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Buick Encore based on all problems reported for the 2015 Encore.
Brakes. In town I have to let off the gas for half a block and gradually apply the brakes or double brake to make it stiffen up and come to a complete stop. I've had it serviced. The master cylinder was replaced and it seemed fine for a month but then I began to have the same issues again. By that time though it was used it only had 36000 miles and is still giving the same issues. When applying the brakes the pedal goes down with maybe an inch or two inches from touching the floor.