At 28,000 miles, the vehicle emitted black smoke from the exhaust. Despite the mechanicâs efforts to identify the issue, no diagnostic codes were detected. Currently, the vehicle has accumulated 100,000 miles. The engine suddenly lost the ability to accelerate beyond 20 miles per hour. After several months of repairs involving multiple turbo replacements, it was determined that the engine was severely damaged and should have been replaced over 50,000 miles ago. The engine was subsequently replaced, but only a year later, it failed again. After replacing the first engine, the vehicleâs performance deteriorated significantly. The vehicle required another visit to the shop for several months, resulting in another engine replacement. Over the course of several months, the vehicle lost all power and exhibited difficulty shifting into reverse. Consequently, it failed to reverse and was involved in an accident.