We just received an proposal from a non-Tesla shop (okay, Electrified Garage) about a potential catastrophic failure of the drive unit and an offer to replace it for about $4k. I don't see a lot of talk on any forum about this being a problem. My wife's 2012 S has 149,000 miles and has had a whine from the rear end since about 35,000 miles in 2016 or so, when Tesla was saying that this wasn't a problem and wouldn't cover it under warranty. EG is selling a less expensive fix than Tesla for a problem that we don't know we have and that may be caused by a bad bearing in the motor. Before committing to this, I'd like to hear from other owners. Thanks for your input.