NHTSA Complaint #11076657 — 2015 CHEVROLET SPARK EV

WHILE DRIVING NORMALLY, THE "SERVICE STABILITRAC" WARNING APPEARS FOLLOWED IMMEDIATELY BY A "SERVICE BRAKE ASSIST" WARNING. THEN THE BRAKE PEDAL REQUIRES EXTREME EFFORT TO SLOW OR STOP THE CAR. THE REGENERATIVE BRAKING IS ALSO DISABLED. AFTER STOPPING THE CAR, THE CAR CAN BE TURNED OFF AND THEN BACK ON WHEREUPON THE BRAKES WILL BE WORKING NORMALLY. THE WARNINGS AND LOSS OF BRAKING ASSIST MAY STAY AWAY FOR A PERIOD OF 1 MINUTE OR UP TO 1 WEEK OR MORE. IT APPEARS TO BE VERY RANDOM. FORTUNATELY, NONE OF THE OCCURRENCES HAVE RESULTED IN A CRASH, BUT THERE HAVE BEEN SCARED DRIVERS AND PASSENGERS. THIS IS THE SECOND TIME THIS PART (THE DEALER BLAMES THE BPMV AND IS NOW PUTTING THE FOURTH ONE ON MY CAR) HAS BEEN AT THE DEALER. THE SECOND ONE WAS APPARENTLY LEAKING WHEN INSTALLED. THIS WORK WAS PERFORMED AT MOMENTUM CHEVROLET IN SAN JOSE, CA. THE PROBLEM OCCURS WHEN THE CAR IS IN MOTION, TYPICALLY AT 20-50 MPH, AS THAT IS WHAT MOST OF MY DRIVING CONSISTS OF. THERE IS A FORUM THREAD ON THIS SUBJECT AT CHEVY SPARK EV FORUM. OTHER DRIVERS HAVE DESCRIBED MULTIPLE EVENTS IDENTICAL TO MINE. [XXX] PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).*CC