I actually did call in to the BMW dealership and talked to the parts department that sold me the window regulator. I asked them if it was possible that this bolt was reverse threaded... they told me no.... Maybe I should have asked to talk to someone who was certified to work on a 135i....
I did not know about the TIS guide - I was actually looking for exactly this... that may have also helped me greatly...
But anyways, I'm leaving all these messages since I was unable to find any information regarding this DIY with any google-fu. And now when I'm searching for these same problems, I'm getting the top search result to this thread. So hopefully at least I relieve another 135i owner's headache when it comes to replacing replacing their window regulator.
Thanks for the info though. I wonder how much of that information I can download if I sign up for a one-day pass.
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