apparently this is a problem with this car. I purchased my 2005 ls430 in Dec, Approx 92,000 miles. I have the exact same slight pull to the right. I drive three different models and brands of cars down the same road and only my Lexus has that pull. In the left lane it seems to be less aggravating. I have had the vehicle 4 wheel aligned. If you casually drive the car you may not notice it but that pull is certainly there. If anyone has a solution or advice please post it. The pull is the only thing that keeps me from living this car. I also find the steering takes a lot of attention to keep it tracking straight.