I got some airbag trouble on my E34. Common troublemaker the slip ring has already been replaced with a NEW dealer item a few months back. I replaced it properly and put it in the "middle" position with the wheel also in the middle position. The steering wheel was able to do a full left and right turn without the feeling you are snapping wires.

The universal ADS interface I am using (not a BMW computer) says "driver airbag firing circuit fault".

Assuming the slipring is ok (I will see if i can measure it), what other common airbag issues are known for the E34?

I have both a driver and passenger airbag.