hey guys, I have Vitz 2009 and facing the same exact problem. Since, I got this car few days ago so I have already changed Engine Oil, Air Filter, Oil Filter and Throttle cleaned. But the vibration was still there. I have replaced both Engine mounts as well since they were in a very bad shape and the vibration was gone. Now, today when I was driving and got stuck in the traffic, it started vibrating a lot like very much annoying. I know a little vibration is common in 3 Cylinder Vitz but it was really heavy. By the way, my AC and Lights were on. It doesn't happen when AC is off. Anyway, after attending an event when I was returning home after the rest of around 2 hours the vibration was gone even tho my AC and lights were on but didn't notice vibration like that. This only happened in Drive mode, Reverse Mode and brakes pressed. Otherwise the drive is smooth. No vibration while driving. Any one can guide please?