The contact owned a 2013 BMW 550I. The contact stated while driving 15 MPH, the vehicle lost motive power and stalled without warning. The contact was able to coast into the driveway. The contact attempted to restart the vehicle and there was an abnormal sound coming from the engine. No warning lights were illuminated prior to the failure; however, several unknown warning lights illuminated when the vehicle failed to restart. The contact’s husband checked the vehicle and became aware of smoke coming from the vehicle. The vehicle was towed to the dealer where it was diagnosed and determined that the battery had failed and needed to be replaced. The battery was replaced. The contact insisted that the dealer check the vehicle again, and it was diagnosed and determined that there were metal fragments found in the oil pan. The contact was informed that the engine needed to be replaced. The vehicle was not repaired due to the cost. The vehicle remained with the dealer. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 126,000.