HAD REQUIRED RECALL (#178) FOR A PRA TO BE REPLACED PERFORMED 4/6/19, UPON DRIVING IT NOTICED ELECTRONIC, ACID SMELL THAT WENT AWAY. TODAY (4/7/19), UPON DRIVING IT, THE CAR'S CABIN FILLED WITH SMOKE THAT WAS COMING FROM THE REAR SEAT. I IMMEDIATELY PULLED OVER, SHUT THE CAR OFF, REMOVED AS MUCH ITEMS FROM THE CAR AS POSSIBLE AND CALLED MY WIFE, 2 MILES DOWN THE ROAD AT HOME TO BRING A FIRE EXTINGUISHER. UPON HER ARRIVING ROUGHLY 5 MINS LATER, FLAMES BEGAN EMERGING FROM THE BACKSEAT, WHICH I QUICKLY EXTINGUISHED AND PROCEEDED TO CALL 9-1-1. UPON THE POLICE AND FIRE DEPARTMENT ARRIVING, FLAMES WERE STILL EMERGING AND STILL SMOKING UNTIL THEY WERE ABLE TO DOUSE IT WITH WATER, FLAME RETARDANT, AND ALSO DISCONNECT THE BATTERIES TO PREVENT FUTURE DAMAGE. THE CAR WAS EVENTUALLY TOWED TO THE DEALERSHIP AND NOW AWAITING.