Engine misfire, bringing vehicle to low speed. Safety was a main concern, while I was on a highway and could not maintain a flowable speed with other vehicles. The problem was confirmed by the dealer on 4/25/25 milage 77681, repaired. Then happen again on 5/9/15 milage 79091, repaired and confirmed again by a different dealer. There were no pre-warnings, once it happen all warnings went on.