I just got my 2005 Saab 92x Aero (2.0L Turbo WRX Wagon). I just got the car from the dealer and its got around 80,000kms on the odometer. I have been noticing that sometimes when im in the low rpms around 1700 - 2000 rpms and im in 1st or 2nd gear when I lightly press the throttle to accelerate there is a hard jerk in acceleration and then it smooths out, sometimes its smooth as it should be. Does anyone know what this can be caused by? anyone have similar problems?