At highway speeds (typically between 70’80 mph), the drivers side door of my Tesla Cybertruck begins to visibly vibrate and emit wind noise. The vibration is strong enough that I can see the door flexing from inside the cabin. It is not subtle ‘ it shakes to the point that Ive become genuinely concerned for my safety. At times, it feels unstable enough that I worry the door could detach, which could lead to a serious accident or even death. It is scary, and no vehicle should behave this way at normal highway speeds. I have returned to the Tesla service center seven times for this issue. During my most recent visit, a technician was finally able to reproduce and confirm the problem. I greatly appreciate that the local manager is now taking it seriously, but up until this point, Ive repeatedly been told its normal, which it absolutely is not. From what Ive gathered online, many other Cybertruck owners have reported similar experiences. Some mention a service bulletin and a bracket fix, but I have not received a definitive solution despite the repeated visits. No warning lights or system messages appear when this happens, and the issue only occurs at high speeds. This vehicle has been inspected numerous times by Tesla technicians, but the vibration remains unresolved. Im reporting this because I believe it reflects a design or manufacturing defect, and Im deeply concerned about the safety implications if this issue is not addressed.