I have a 2001 S4 6speed with 150k and when a pass 85km an hour I feel a shimmy/vibration in the front end. The wheels and tires are new and balanced with the proper hubcentric ring. I just had an alignment done after getting a new front outer tie-rod. Anything below that speed is fine but above 85 I can really feel it in the foot wells, although the steering wheel has no noticeable movement and the car drives straight as I push it above 160 the vibration seems to lesson. My question is what should I look at first, bearings, motor mounts, drive shaft etc.?

Thanks

 

How are the CV's

 

I just had both outer CV boots done and a tie rod end other than that the shop said she looked good. I brought it back today to tell them the vibration wasn't present until they worked on it, so here's hoping they'll fix it.

Thanks

 

are you using budget tires ?

 

No, brand new Hankook V12's but I think they may have found the issue. One of the weights came of the front tire so it was off balance plus the belly pan was loose. It's not perfect now but much better.

Thanks

 

Check the CV shaft. usually they get worn out and you get that vibration, it might even be as bad as if your in a hurricane. And since you said you changed the boot, this means that dirt and water enterd the universal and damaged it before that.