We had the X for a week and the driver's side falcon wing door failed. It wouldn't open or acknowledge that it was shut. This was challenging as I had to get my toddler from her car seat from the opposite side - at 9 months pregnant. I was able to contact roadside assistance who made an appointment for service at my local service centre. On the way to the appointment (after about 45 minutes of driving) the FWD suddenly popped open about 4-5" and after pulling over I was now able to open the FWD all the way, but it still wouldn't latch shut (toddler was not in the car!) Nothing appeared out of the ordinary; there was nothing blocking the latch or the doors. The car had been garaged all night so there wasn't any ice build-up. It was very cold out, but again, no visible moisture on the car. I made it to the service centre without further issue. I don't believe they even took a look at the car yesterday. I did get a rental car, and that part was seamless. I asked for an update at the end of the day yesterday and was told they needed to keep it overnight to "replicate the problem and diagnose it." I was a little frustrated that they had it all day but had not yet even taken it in. It's not a complex problem to replicate it: the door won't shut! LOL I offered to drive down there and replicate it a dozen times for them in the space of a minute. They didn't appreciate the sarcasm. I believe the issue to be the locking mechanism, as I can hear the motors working to open the door, and when it was trying to open originally, there was slight movement up top, but none at the bottom where it latches. And that fits with the door suddenly opening, as if the stuck latch finally released. The car signalled that there was an obstacle in the way when the door wouldn't open, and no solution to open the door through other means worked. The car seat was in the way of the manual latch by the speaker, and that wasn't tried as I couldn't unlatch the car seat with the door stuck shut, and especially so at my very pregnant state. I drove for over an hour with the blasted "do not drive" chime going - and was mightily irritated by the time I got to Tesla for service from the incessant chiming. So after ordering the car in October, having it delayed until January, and finally getting it Jan 31, we had it 8 days before it needed to be turned in for a major malfunction, and huge safety issue. Let's see what today brings.