The contact owns a 2015 Hyundai Elantra. The contact stated while driving approximately 35 MPH, she heard a knocking sound coming from the engine compartment. The contact stated no warning light was illuminated. The contact stated that the noise was intermittent at first but had become almost constant and would occur at various speeds. The contact stated that she recently saw white smoke coming from the exhaust pipe. Additionally, the engine was revving high when started in the morning. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle had not been repaired. The contact researched online and related the failure to NHTSA Campaign Number: 17V226000 (Engine and Engine Cooling). The manufacturer had not been informed of the failure. The failure mileage was approximately 112,000.

- Blue Springs, MO, USA