I have decided to pro-actively refurbish my window regulator assembly with the clips above, purchased from
RegulatorFix.com for $14 delivered, per front window. Also 2 new black plastic window clips.
This weekend I will loosen the window bolts holding the glass, slide it up manually and tape in place, and remove the regulator itself from the vehicle, and I will clean and lubricate the cables with DuPont Teflon spray, and clean/lubricate the tracks with the same. Then I will install the RegulatorFix clips on the regulator itself, and depending on how beefed up/updated the attachment point is, I may add the infamous "zip tie repair" to further reinforce the connection, then I will bolt the regulator back in place, lower the window manually, and install the new window clips in place.
Will take my time to snap a few pics as well how my regulator looks, its original as far as I know on my 2003, 80k mile X5. I haven't heard any forum members trying the RegulatorFix clips on their existing regulators either so I may as well be the forum guinea pig. If my passenger window goes well, I will do the same on my drivers window in the coming weeks.