I have an 2000 Audi A3 1.8TQ, when I bought the car, the rear diff was broken. Nobody cand say what was the cause. Here is some pics.
Recently I have changed the diff, but now it seems like the Haldex is always locked, I can hear when I do slow cornering. You feel and hear the tires rubbing the road. When driving in a strait line, there's no strange noise. The Haldex, ABS or engine has no DTC's.When I disconnect the haldex connector, the problem is gone.
Tryed to replace the electrical control module from my old haldex, but problem remains.
Anyone an idea what can be the problem? Maybe that was the problem crashing the last diff.
Here you can see the new diff (left) and old one (right).