NHTSA Complaint #11018752 — 2015 MAZDA MAZDA3

HOT WEATHER ACCELERATION AND BLIND SPOT MONITORING SYSTEM (BSM) ISSUE: IN EXTREMELY HOT WEATHER BSM OFF LIGHT TURNS ON REPEATEDLY WHILE THE VEHICLE IS IN MOTION OR STARTING FROM COMPLETE STOP. AT THE SAME TIME THE INFOTAINMENT SYSTEM DISPLAY FLICKERS IN SYNC WITH THE BSM OFF LIGHT APPEARANCE. WHEN THIS OCCURS THERE IS A CLICKING SOUND COMING FROM THE FRONT OF THE CAR/WHERE THE ENGINE IS LOCATED. THE SOUND IS ACCOMPANIED BY TEMPORARY LOSS OF ACCELERATION WHEN IN MOTION OR STARTING TO MOVE FROM A COMPLETE STOP. WHEN THIS OCCURS WHILE STARTING FROM A COMPLETE STOP, THE ENGINE REVOLUTIONS (REV) DROPS BELOW 1K RPM DESPITE GAS PEDAL INPUT THUS THE CAR WOULD NOT MOVE/ACCELERATE FOR ABOUT 5 SECONDS. WHEN IT OCCURS WHEN THE CAR IS IN MOTION SUCH AS ON THE HIGHWAY OR MERGING ONRAMP INTO THE HIGHWAY THE CAR UNSAFELY SLOWS DOWN DESPITE GAS PEDAL INPUT. AGAIN THIS ISSUE IS OBSERVED DURING UNUSUALLY HOT DAYS EG. JULY 22, 2017 IN ST. LOUIS, MISSOURI.