One problem related to tire has been reported for the 2002 Lexus SC430. The most recently reported issues are listed below.
I own an "02 Lexus SC 430. . With run flat tires. The tires pull badly when running on uneven ground. . Sometimes the pull is so bad you must hold the wheel firmly or you can lose control of the car. It is not safe. My wife is afraid to drive this car. The service advisor at 2 dealerships told me that is normal for run flat tires. I went to a tire dealer. . He told me the same thing. These tires are not safe. . And should be investigated by your agency.