I've been having a problem with my 855 T5R wagon ever since i bought the car. Basically, above 40mph the steering wheel seems to vibrate a lot. As speed increases to 55-75, the vibration can be felt throughout the entire car. Its most noticeable on the highway.

It sounds and feels similar to when wheels are out of balance, but i don't think thats it as i just had my alignment done and wheels balanced yesterday. I was hoping that this would be the fix for it, but it really didn't improve the vibration at all.

When i did the suspension last week i replaced almost everything...struts, springs, spring seats, strut mounts, sway bar links, outer tie rods.

Anyone ever heard of this or something similar before?

 

Maybe its the belts in the tires? Have you tried rotating the tires and see if the problem persists?

 

Might also be a bad rim.