The contact owns a 2018 BMW X5. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull to the shoulder of the roadway, where the vehicle was able to restart. After restarting the vehicle, the contact observed white smoke and embers coming from the EGR cooler and intake manifold. No warning lights were illuminated. The vehicle was taken to the dealer but was not diagnosed. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V907000 (Fuel System, Diesel); the VIN was included, but the vehicle was already repaired in 2022. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 66,000.