[MaximusB]

Check your alignment. It is rare but they can cause vibration if alignment is out.

How’s the tire wear? Try switching the tires side to side and see if that change anything.

Try switching the tires side to side. Do the front wheels first and drive it to see if that changes anything and then switch the back around. If you’re feeling vibration (left/right steering shake) then chances are it has nothing to do with the back wheels. While swapping the wheels around take a look at the brake discs. If that fix the vibration then something is wrong with your tires. If it doesn’t then check the wheel alignment. Have the shop check for worn steering/suspension components while they have your car on the alignment rack.

Recently I had vibrations at highway as well. Ended getting my wheels balanced twice by two different shops and an alignment done to get rid of it.