CR said the problems involve "smaller details that caused some minor issues, such as wind noise, squeaks and rattles, and body hardware (including the sunroof, doors, and locks)."
Tesla Model S Recommended | Car Reliability - Consumer Reports News
I have a late November build, and have encountered pretty much all of these problems.
Wind noise: pretty intense after 65mph. Even more than my other sedan, which is shaped like a brick, has huge dumbo-sized side mirrors, and was designed by a dying auto maker. If I were used to Mercedes or BMW levels of quiet, I'd probably be upset. I expected quieter, but it's not bad enough to worry or complain about.
Squeaks and Rattles: driver's seat squeaks like crazy. Is being replaced as soon as they can get a spare seat, which supposedly have a 4+ week wait. Tons of squeaking in the dash and somewhere in the trunk area, but come and go so I haven't been able to track them down.
Body hardware (sunroof): Painful pressure buffeting since new, such that the windscreen would bounce up and down violently. Maybe rectified by service, still keeping an eye on it.
Body hardware (doors): Hey! They work!
Body hardware (locks): These don't, unfortunately. Weird behavior when charging that sometimes leaves me locked out until I can dig out and press buttons on the key. Behavior when away for >24h inconsistent, not always matching the described behavior for this case in the manual.
Plus, condensation in tail light trim.
So, in summary, those low ratings are probably deserved.
To be perfectly honest, I've had more "problems" with my Model S than probably my last 5 or 6 cars combined. A lot minor and some serious (if you consider a drive unit replacement serious, which I do, because I'd hate to think what that would cost out of warranty). Having said that, Tesla has fixed all the problems and I've barely had to ask. No fights or struggles like you might have with an ICE car dealer trying to get things fixed. Unfortunately, these specific CR ratings are pretty binary: you had problems or you didn't.
Same. I had exactly one issue each with two Civics I owned (over a total of 11 years), and my Evo had three issues (over 6 years). 5 issues in two months with the Model S, one unresolved with no known resolution available (for the door locks). All relatively minor, sure, but still annoying.
Tesla's been pleasant to deal with, and in general willing to track down issues, but for the past 4-5 weeks I've been getting the "Someone will look at it (ignore him and he'll go away)" for the issue regarding my door locks, so I'll have to see how that plays out. I've been toying with the idea of involving a different service center. I'm not sure this one's on top of things.