The contact owns a 2012 Kia Forte Koup. The contact stated that while the vehicle was being serviced, white smoke was coming from under the hood. While the independent mechanic was starting the vehicle, there was smoke coming from the vehicle. The mechanic turned off the vehicle. The contact stated that prior to the smoke on a separate occasion, while the contact’s daughter was driving 30 MPH, the check engine warning light illuminated. The vehicle was towed to an independent mechanic who diagnosed that the engine had caused the battery, starter, and knock sensor to fail. The vehicle was repaired for the prior failures. The contact stated that after the most recent failure, the independent mechanic diagnosed that the engine had failed and damaged the battery, starter, and knock sensor. The independent mechanic replaced the battery, starter, and knock sensor. Additionally, the engine needed to be replaced. The contact related the failure to NHTSA Campaign Number: 20V750000 (Engine); but the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was unknown.