my car is 07 A3 2.0T, Manual. When i drive on highway, the car start shaking after 100 km, even the steering wheel is shaking too. I can hardly feel the vibration. It's so terrible!! Anyone know what's the problem is?? btw, my car is chipped by GIAC half yr ago, is it because i chip the car and something goes wrong with it?? thanks for any reply!!!!

 

The first thing I would check is the wheel balance.

 

Coudlnt agree more it usually ends up being a wheel balance

 

Wheel balance?? well, i didn't lower my car, i just change a set of 17" winter tires on the oem wheels. i guess it shouldn't be the wheel balance problem...

 

You just had new tires installed, and now you have a vibration problem. It is most definitely a wheel balance problem. Bring your car back to the shop that installed your tires, and have them rebalanced. Since they didn't do it right the first time, they should not charge you.

Koz.

 

do you have snow in the wheels?? we have got a lot of snow...or did you wash it?? ice will do the same thing, this can cause a balance problem! i would wash the wheels out before you go back and get mad!

 

I agree. I had the same problem as the OP. I could even feel the floor vibrating once I hit 100km/hr. When I checked there was a ton of snow ice buildup in the rims