This thread has given me nightmares. I own a 2013 MS85 since new. My warrantees are all expiring this summer (aug 4th). I have 54K mile and I’m still in the original DU (makes zero noise). Because of this thread, I asked Tesla if they could perform a preemptive bearing replacement and what the cost would be, they said no (they only do DU swaps). The also said that a new DU would be $8k out of warrantee. I don’t drive aggressively, so I’ll baby my car for as long as I can. Also, hopefully, by the time something bad happens, we will have an Electric Garage in Ohio (or nearby) that can help. One thing is for sure, I’m not selling my car for what the market appears to be (teens). As far as the battery (also original), I still get 225 at 90% in the winter and 228 in the summer.