On and off vibration while driving.

My IS200 started vibrating.....sometimes when I am driving. The vibration seems to start somewhere at the front and spreads to the rear. It gets very bad at times. Other times there is no sign of it. I have changed two bushings at the front which were busted but the problem remains. Any ideas?

Check your tires for out-of-round. One may have slipped a belt and could be very dangerous. Get it fixed no matter what it is.

Thanks Brian but I checked that too......it had happened to my 525i before. What I did do was tighten any and everything on the front suspension......now I just get a minor viberation. I need to shave the front rotors though. After that I hope it goes away.

Good luck