Recently Elon stated they were working towards a million mile drive train. This is a worthy goal and I personally would like to see them succeed (although I probably won't live long enough to drive my car a million miles). We know that Tesla had some problems with drive trains (inadequate lubrication, slack parts) and it seems that it is very easy to replace the drive unit so rather than trying to diagnose and repair the drive train in the field, they just replace it and send it for factory reconditioning. Hopefully their efforts are bearing fruit and newer cars have fewer drive unit problems. This poll is intended to try to see if we can find a trend in drive unit problems. I'd like people who have had one (or more) drive unit replacements to enter the production date of their car (by quarter). The gory details of failure mode, number of replacements, mileage, odd sounds, etc. can go in individual comments to the thread. Of course, like all polls here, we don't have denominators and newer cars will have fewer miles, etc. but we might find out something interesting.