I have a 2004 Audi A4 quattro. The problem I am having is it is destroying the window regulator. It only does this on the front passenger door. So far I have replaced two regulators in the last 8 months. I just had another one go out two days ago. I have looked over the motor, everything test good and the splines on the drive shaft are in ok shape. I do not see any unwanted movement in the drive shaft. Also I have not been putting cheapo parts in. It got the correct OEM part last time thinking cheap parts may have been the problem. If any of you guys have seen this and know what the cause is I would greatly appreciate it.