This has been happening intermittently over the past year or so and I finally got around to taking it into the dealer today. Of course in my infinite wisdom, I waited until after the vehicle was out of warranty to do so. I'm not that bright sometimes.
To their credit the dealer immediately diagnosed it correctly based on what I've seen in this thread. They're wanting $888 to replace the shifter assembly. A few questions:
1.) I've shown them the TSB and the service advisor is investigating. What are the chances they'll cover it out of warranty?
2.) Is it even worth fixing? It's happening about once every week or two, with an occasional stint where it will happen a few days apart. Seems a few people have had the issue reappear even after the repair though, so I'm concerned its just going to come back again after it is replaced.
3.) I'm not opposed to trying to do this myself. How difficult is the repair if they end up not covering it? Anyone know exactly what part(s) needs to be ordered?