NHTSA Complaint #11193769 — 2014 HYUNDAI SONATA

THE SOFTWARE UPDATE PER HYUNDAIS "953" SERVICE CAMPAIGN, WHEN ACTIVATED, REDUCES ENGINE PERFORMANCE WHICH COULD LEAD TO ACCIDENTS (DUE TO INSUFFICIENT ACCELERATION, ETC.). I HAD THE RECENT ENGINE SOFTWARE UPDATE PER HYUNDAI'S 953 CAMPAIGN. ON 3/22/19, I EXITED A HIGHWAY AND SLOWED DOWN PRIOR TO MERGING ONTO THE NEXT ROAD. I NEEDED TO ACCELERATE, HOWEVER MY ENGINE BOGGED AND HESITATED SIGNIFICANTLY. AS SUCH, ANOTHER CAR QUICKLY APPROACHING HAD TO BREAK HEAVILY TO AVOID A COLLISION WITH MY CAR. I LOOKED DOWN AND OBSERVED MY ENGINE LIGHT FLASHING. I TOOK THE CAR IN TO ACTION HYUNDAI (MILLVILLE, NJ), AND THEY STATED THAT THE NEWLY INSTALLED SOFTWARE HAD DETECTED ISSUES WITH MY ENGINE AND AUTOMATICALLY PLACED MY ENGINE IN THIS LOW-POWER MODE. I HAVE SINCE LEARNED THAT I WILL BE RECEIVING A WARRANTY ENGINE REPLACEMENT.