I was taking a left turn from [XXX] onto [XXX] in the outer (right) lane. As I was exiting the turn, the AEB went off suddenly without warning -- the car came to a sudden and complete stop. There were no cars or obstacles in the road ahead of us in either lane and so it is unclear what would cause the braking event. Due to the sudden stop, a man driving a moped was not able to stop in time--he was able to swerve to avoid a head on collision, but he collided with our rear passenger bumper. While, fortunately, there were no injuries, both vehicles sustained minor damage. This is the second incident of "phantom braking" I have experienced with this car. The first incident was within the first year of owning it driving on a 35 MPH road when it mistakenly thought a car was veering into our lane (oncoming traffic) -- in this case the phantom braking was brief and did not bring the vehicle to a stop. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)