My Gs300 started hesitating about two weeks ago. The car would lose power , or not accelerate if the gas pedal is pressed. No CEL. I asked a Lexus service advisor and told me that the car probably needs a new throttle body ( $800). Service advisor asked the Lexus master technician for a cheaper solution. Tech said to clean the MAF sensor. I bought the CRC MAF sensor cleaner from Autozone. Removed the MAF sensor, then sprayed the platinum wire sensors. Drove the car after reinstalling the MAF sensor. Problem solved. No more hesistation.

shoulda asked here, i woulda told you to clean the MAF sensor

its a semi common problem

I bought my car with a hesitation nothing really bad just something that made it difficult to ease into throttle after reading this I literally too the sensor out and blew into it and it solved the problem lol