I was on the highway today and I noticed the front end of the car shaking. At first I thought it was a flat tire but then I slowed down to about 45 mph and the vibration was gone. Then I accelerated and noticed the vibration coming back at around 55 mph. This was on a smooth road BTW.

Could this vibration be related to engine or suspension?

 

was this vibration felt through your steering wheel? if so, the vibration is being transferred from your wheels, to your rack and pinion, which is connected to your steering linkage and steering wheel. simply put, you need a rotation and balance of the wheels. when was this service last performed? if this is not the case, could you tell where the vibration seemed to be coming from? was it just the front wheels? all 4 wheels? driver side or pass side? maybe i can help you out. hope this helps a little.

 

I had new tires a month ago. The whole front end of the car shakes. As for the steering wheel, it was fine.