Two problems related to suspension have been reported for the 1999 Lexus GS300. The most recently reported issues are listed below.
When exceeding 60mph, the GS 300's steering wheel shakes and vibrates quite noticeably. The faster you accelerate, the more noticeable the steering wheel vibrates. This causes the the car to become more difficult to handle, brake in a straight line, switch lanes and control while driving in a curve, over bumps and at highway speeds. Even after the tires were balanced and aligned, the noticeable steering wheel vibrations continued. This is a serious safety issue since it makes the care more difficult to handle during emergency procedures and when driving at highway speeds, when the the vehicle is becomes more difficult to control.
There is excessive vibration when driving from 55 to 75mph. Dealer has seen vehicle 5 times, and still no solution.