My model S has been making a Honda Civic with a can sound, I went into the service center (Rocklin CA) and drove around with a tech who confirmed the sound was not normal, it literally sounds like an exhaust, rumbling when I accelerate. I was told a new drive unit will be ordered and they'll schedule me in for a replacement, will take a week or two for the drive unit to arrive. Ok no problem, one week later I email the service center for an update and they tell me they ordered the new drive unit and it'll arrive within a week or two. It's been five weeks since they said they will order a new DU, I hate to be a bother and constantly nag them, so I haven't contacted the service center about it. This will be the second DU since July, and last time they were very quick with replacing it. Normally I wouldn't care that it's taking this long, but the problem is I let my coworkers use the car when they go out to pick up lunch for the office, and just this week I got a few comments about the car making a weird noise, they thought electric cars were "silent" I agreed that my car has issues and they respond with a "should have gotten a normal car" At this point I doubt they'll contact me about replacing the DU, and that's fine I'm at a point where I just say "**** it" whenever someone mentions the noise I love tesla, I really do, and I love my car.. just had to vent a bit. Also I know the whole, squeaky wheel gets the grease saying, but I'm not that type of person, I went in for service, I was told they're on it, I followed up and was told they're on it Thats all I'm going to do, I will not nag to get my car fixed.