Engine breakdown in middle of the road. Lifter valves failed and had to be taken in for complete Engine repair/replacement. Dealership is currently repairing. Vehicle is available to inspect after repair if requested. Lifter valves Engine failure confirmed by dealership. Safety was serious concern as Engine failed in middle road with family in vehicle during heavy traffic. Could have lost control of vehicle as Engine went haywire. 45,997 miles. No warnings signs before complete failure. Just completed a road trip day prior with no issues.