This problem started about Two(2) month ago, consisting of surging and hesitation when pushing the gas pedal about 40 to 60%. This problem is very annoying when driving, because the problem consisting of surging and hesitation when pushing the gas pedal about 40 to 60%. This problem is very annoying when driving, because the car hesitates and surges making me very nervous to jump out into traffic. Cars at the dealer now, and I'm very surprised that my Lexus is in the shop unexpectedly. I have always purchased Lexus and I've never had a problem or a unexpected trip to the service department. I'm starting to wonder if I made a mistake by purchasing the four-cylinder turbo charged engine. I'm totally hoping not, and I hope this is my only problem throughout the remainder of the lease.