Kia K900 steering wheel and front seat vibration between 58-72 mph despite tire and alignment replacements on Kia K900

Some Kia K900 owners report experiencing steering wheel and front seat vibrations between 58-72 mph, even after replacing tires and performing alignments. These vibrations may be attributed to unbalanced wheels, which are a common issue at high speeds. Additionally, misaligned wheels can contribute to the problem and should be addressed to prevent further vibration. Some owners have also noted that bad wheel bearings can lead to shaking in the steering wheel and body vibration. In cases where oscillating vibrations occur at high speeds, damaged driveshafts may be the underlying cause. Given the persistent nature of these issues, it is advisable for owners to seek a professional inspection to identify any less obvious problems that may be contributing to the vibrations.