I have recently bought a 1.8 a6 avant on a t plate. Many faults have been sorted inc shocks on the rear electrics in the aircon and a new abs unit costing a fortune however the last problem is a knock from the front left corner when going over speed bumps pot holes anything uneven. I took it to the garage and they said they couldnt find anything and to just wait until its more obvious Anyway haveing now replaced many of the suspension arms the noise is more pronounced and has led me to believe that it is the antiroll bar bush.

Having a look at the bush it seems quite solid i have given it a good shake with the wheels off the ground and nothing moves. Is it the case that these bushes can be very worn but not show it when inspecting it?

Could the problem be something else? steering rack, engine mounts mabe?

I am going to replace the antiroll bar bushes anyway so if that sorts it I will post the result.

Anybody else having this problem?