NHTSA Complaint #11022827 — 2016 CHEVROLET SPARK EV SERVICE BRAKES

Complaint Details

ODI Number	11022827
Vehicle	2016 CHEVROLET SPARK EV
Component	SERVICE BRAKES
Date of Incident	September 1, 2017
Date Filed	September 12, 2017
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

SUDDEN AND STRONG BRAKE PEDAL APPLICATIONS OCCASIONALLY RESULTED IN SIGNIFICANTLY MORE PEDAL TRAVEL, SIGNIFICANTLY LESS BRAKING FORCE, AND SIGNIFICANTLY LONGER STOPPING DISTANCES THAN TYPICALLY EXPERIENCED DURING SIMILAR BRAKE PEDAL APPLICATIONS. EACH EVENT OCCURRED ON WARM, DRY SOUTHERN CALIFORNIA STREETS DURING DAYLIGHT HOURS, TRAVELING BETWEEN 30-40 MPH. ON EACH OCCASION, THE BRAKES -- INCLUDING REGENERATION -- FUNCTIONED AS EXPECTED JUST PRIOR TO AND JUST AFTER THE EVENT, AND THE BATTERY WAS IN A STATE OF PARTIAL DISCHARGE, BUT DURING EACH EVENT THE PEDAL FEEL WAS SIMILAR TO THE FEEL EXPERIENCED JUST AFTER CHARGING TO 100% (WHEN REGENERATIVE BRAKING IS NOT YET AVAILABLE.) I SUSPECT THAT ON EACH OF THESE OCCASIONS, THE CAR'S REGENERATIVE BRAKING WAS UNEXPECTEDLY DEACTIVATED FOR REASONS UNKNOWN, AND THE SUBSEQUENT MECHANICAL-ONLY BRAKE APPLICATION (ON COLD PADS) RESULTED IN THE PEDAL FEEL/BRAKING FORCE/STOPPING DISTANCE CHANGES. NOTE THAT I NEVER EXPERIENCED THIS IN TWO YEARS OF DRIVING A FIAT 500E ON THE SAME ROUTE, IN THE SAME WAY, YET THIS HAS OCCURRED WITH MY CHEVROLET SPARK EV ON AT LEAST THREE OCCASIONS AS OF SEPTEMBER 1ST 2017.

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