There are sensors for the ETS system that help keep the car under control. If those sensors fail they may cause the car to apply the brakes and do some strange things at different times. Also the car has a sensor for the steering wheel, if that is not working properly you will have the same problem. You will need a factory type scan tool to test the ETS system to find out what is wrong. More than likley the lateral acceleration sensor has failed. It is located just behind the shifter in the center console