Just did this job today, on '16 3.8.
Thanks to Joegr; very helpful.
Takeaways:
Not a bad job at all if your're one of those comfortable with the fiddle factor required on new cars. Took me 1 hr 30 minutes going very slow.
Don't worry about exactly 4mm diameter tool to push springs aside; I used a Phillips screwdriver at 3.8mm; anything that fits in there will do. On bottom hole you push straight in and help the pad release with your free hand. On the side holes, pry the spring towards the center and help the pad release with the free hand.
To remove the connectors on the air bag, first pry up the yellow rectangular pads; then the connector comes right off.
*** Important: after removing the big bolt, mark the position of the
wheel to the shaft with a Sharpie before removing it.
The factory manual forgets about the wires attached to the back cover. You have to remove and un-wire the haptic controller box, plus get the multipin connectors off the R and L remote control pads, to get the back cover off. I never figured out how to get the connector off the LH Stereo pad, but cover was free enough to let me replace the RH pad easily.
Use Loctite, and 29-36 ft lbs on the big bolt going back.
I didn't lose any pre-sets, satellite favorites, seat memory, NAV history; CD even remembered correct chapter and verse of my audio book.
Had to manually close the trunk to reset the power opener.
It was worth it! That broken rubber nub was unsightly and uncomfortable.