2002 Lexus ES300, car lunges and jerks during acceleration and deceleration. Car drove fine until Lexus upgraded software, and then 100% noticeable difference in performance. Car was brought to jm Lexus approx 4-5 times for problem, and once to palm beach Lexus. Car jerked during test drive with mechanic. I was told it was a "characteristic" of the car, and there was nothing that can be done to fix it. Mechanic stated he has seen the same problem on other cars. Problem has been getting worse.

- Boca Raton, FL, USA

I have a 2002 Lexus ES300. If you stomp on the gas while driving in order to merge or pass the engin reves but the car does not pick up speed I.e there is a big dead spot. I took it to the dealor and was told that was how the care was designed to work. I feel that the hesitation is a big safty problem that could lead to a accident. What can be done to get Lexus to fix this problem?

- Silver Spring, MD, USA