While driving at highway speeds (approximately 70 mph), my 2013 Hyundai Santa Fe Sport suddenly lost power and began shaking violently. I was forced to quickly maneuver across multiple lanes of traffic to exit the freeway and avoid a potential collision. The vehicle became barely drivable and extremely unsafe, especially at high speed. Hyundai later diagnosed the issue as a complete engine failure due to zero compression in cylinder 2. This catastrophic failure happened without warning lights, abnormal noises, or prior symptoms, making it a severe and unexpected safety hazard. Had this occurred while merging, on a curve, or in heavy traffic, it could have easily led to an accident, injuries, or worse. This type of failure — sudden loss of propulsion at freeway speed — puts both the driver and others on the road at serious risk. I am submitting this report because I believe this engine failure reflects a critical mechanical defect that warrants investigation.