I have a Tesla Model 3 Performance (delivered October 2018) and I'm also nearing 50,000 miles (currently at 44,685.79 Miles). I've had multiple autopilot cameras replaced due to failure, backup camera replaced 3 times (1 was from a rear-end accident which included rebuliding the back-end and replacing the trunk and rear side panels and sensors), autopilot computer replaced due to failure (unfortunately not the version 3 one, though I'll get it at some point as I purchased FSD), replacement of the entire back window due to failure of the defroster, replacement of the dash pad due to bubbling issues. I have the same questions. Awesome car, would buy again in a second but want to make sure everything is perfect once the odometer rolls over to 50k. I did have a smelly AC at one point but it seemed to fix itself, should I have Tesla proactively replace the filters? The manual says to lubricate the brake calipers in winter areas that salt roads, have never done this, and I live in the north-east (Pennsylvania), does Tesla do that for free? I religiously was bugs off the car and do an underwash in winter time to remove the salt and sand/gravel.
Side Note: has anyone heard a loud pop from the front speakers, the bar under the extreme front windshield, which then suddenly goes out with no sound from the speakers? It's fixed with rebooting the computer, but not sure if it is a defect that needs fixed or a software bug. It's happened twice, just earlier today.